AI Trajectory

null

{
  "EnableConfigs": [
    "MAC80211_MESH"
  ],
  "FocusSymbols": [
    "nl80211_join_mesh",
    "nl80211_parse_mesh_setup",
    "ieee80211_join_mesh",
    "copy_mesh_setup"
  ],
  "Reasoning": "The patch changes the type of `ie_len` in `struct mesh_setup` from `u8` to `size_t`. This prevents truncation of the IE length when parsing the `NL80211_MESH_SETUP_IE` attribute in `nl80211_parse_mesh_setup()`, which uses `nla_len()` (returning an `int`). The `mesh_setup` struct is then passed to the `join_mesh` callback, which is implemented by `mac80211` (`ieee80211_join_mesh()`). In `copy_mesh_setup()`, `kmemdup()` is called with `setup-\u003eie_len`. Previously, the length was truncated to `u8` (max 255), but now it can be up to 65535 bytes, changing the amount of memory allocated. This is a functional change in reachable core kernel logic (mac80211 mesh networking) and should be fuzzed.",
  "WorthFuzzing": true
}

null

{
  "PatchDiff": "commit afb4e4b6eaad7cd19d5f136099db30989f5d3064\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jul 24 14:59:32 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/net/cfg80211.h b/include/net/cfg80211.h\nindex f5abf1db7558bc..c9af5abdec1f33 100644\n--- a/include/net/cfg80211.h\n+++ b/include/net/cfg80211.h\n@@ -2803,7 +2803,7 @@ struct mesh_setup {\n \tu8 path_metric;\n \tu8 auth_id;\n \tconst u8 *ie;\n-\tu8 ie_len;\n+\tsize_t ie_len;\n \tbool is_authenticated;\n \tbool is_secure;\n \tbool user_mpm;\n"
}

best-expensive

null

{
  "EnableConfigs": [
    "MAC80211_MESH"
  ],
  "FocusSymbols": [
    "nl80211_join_mesh",
    "nl80211_parse_mesh_setup",
    "ieee80211_join_mesh",
    "copy_mesh_setup"
  ],
  "Reasoning": "The patch changes the type of `ie_len` in `struct mesh_setup` from `u8` to `size_t`. This prevents truncation of the IE length when parsing the `NL80211_MESH_SETUP_IE` attribute in `nl80211_parse_mesh_setup()`, which uses `nla_len()` (returning an `int`). The `mesh_setup` struct is then passed to the `join_mesh` callback, which is implemented by `mac80211` (`ieee80211_join_mesh()`). In `copy_mesh_setup()`, `kmemdup()` is called with `setup-\u003eie_len`. Previously, the length was truncated to `u8` (max 255), but now it can be up to 65535 bytes, changing the amount of memory allocated. This is a functional change in reachable core kernel logic (mac80211 mesh networking) and should be fuzzed.",
  "WorthFuzzing": true
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. List them in the EnableConfigs output array,
   and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit afb4e4b6eaad7cd19d5f136099db30989f5d3064
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jul 24 14:59:32 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index f5abf1db7558bc..c9af5abdec1f33 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2803,7 +2803,7 @@ struct mesh_setup {
 	u8 path_metric;
 	u8 auth_id;
 	const u8 *ie;
-	u8 ie_len;
+	size_t ie_len;
 	bool is_authenticated;
 	bool is_secure;
 	bool user_mpm;

gemini-3.1-pro-preview

null

null

							input: 1873
							output: 27
							thoughts: 70
						

Here's my summary, as though I'm thinking through this myself:

**Analyzing the `ie_len` Type Change**

Okay, so there's a patch floating around, and it's making a significant change: it's changing the data type of `ie_len` within the `struct mesh_setup` structure. Specifically, we're going from a fixed-size `u8` to the potentially much larger `size_t`. The file in question is `include/net/cfg80211.h`. This has some serious implications, obviously. My first move is to understand the scope. I need to figure out *everywhere* that `ie_len` is used within that struct. That's the key to understanding the ripple effect of this change. Is this a simple size increase, or does it demand other changes in the code that touches this structure? I need to think about potential buffer overflows, how this impacts memory allocation, and the overall compatibility implications with existing code. Let's dig in and see what we're looking at.

{
  "Expression": "ie_len",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 573 lines.\nUse more precise expression if possible.\n\nnet/wireless/core.c=1500=void cfg80211_leave_locked(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/core.c-1527-\t\twdev-\u003ewext.ie = NULL;\nnet/wireless/core.c:1528:\t\twdev-\u003ewext.ie_len = 0;\nnet/wireless/core.c-1529-\t\twdev-\u003ewext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;\n--\nnet/wireless/core.h=269=struct cfg80211_event {\n--\nnet/wireless/core.h-277-\t\t\tconst u8 *ie;\nnet/wireless/core.h:278:\t\t\tsize_t ie_len;\nnet/wireless/core.h-279-\t\t\tu16 reason;\n--\nnet/wireless/core.h=385=int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,\nnet/wireless/core.h-386-\t\t\t struct net_device *dev, const u8 *bssid,\nnet/wireless/core.h:387:\t\t\t const u8 *ie, int ie_len, u16 reason,\nnet/wireless/core.h-388-\t\t\t bool local_state_change);\nnet/wireless/core.h=389=int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,\nnet/wireless/core.h-390-\t\t\t   struct net_device *dev, const u8 *ap_addr,\nnet/wireless/core.h:391:\t\t\t   const u8 *ie, int ie_len, u16 reason,\nnet/wireless/core.h-392-\t\t\t   bool local_state_change);\n--\nnet/wireless/core.h=420=void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,\nnet/wireless/core.h:421:\t\t\t     size_t ie_len, u16 reason, bool from_ap);\nnet/wireless/core.h-422-int cfg80211_disconnect(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/core.h=648=size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,\nnet/wireless/core.h:649:\t\t\t   const u8 *subie, size_t subie_len,\nnet/wireless/core.h:650:\t\t\t   u8 *new_ie, size_t new_ie_len);\nnet/wireless/core.h-651-#else\n--\nnet/wireless/mesh.c=88=const struct mesh_setup default_mesh_setup = {\n--\nnet/wireless/mesh.c-94-\t.ie = NULL,\nnet/wireless/mesh.c:95:\t.ie_len = 0,\nnet/wireless/mesh.c-96-\t.is_secure = false,\n--\nnet/wireless/mlme.c=24=void cfg80211_rx_assoc_resp(struct net_device *dev,\n--\nnet/wireless/mlme.c-33-\t\t.req_ie = data-\u003ereq_ies,\nnet/wireless/mlme.c:34:\t\t.req_ie_len = data-\u003ereq_ies_len,\nnet/wireless/mlme.c-35-\t\t.ap_mld_addr = data-\u003eap_mld_addr,\n--\nnet/wireless/mlme.c-71-\t\tcr.resp_ie = (u8 *)\u0026mgmt-\u003eu.s1g_assoc_resp.variable;\nnet/wireless/mlme.c:72:\t\tcr.resp_ie_len = data-\u003elen -\nnet/wireless/mlme.c-73-\t\t\t\t offsetof(struct ieee80211_mgmt,\n--\nnet/wireless/mlme.c-79-\t\tcr.resp_ie = mgmt-\u003eu.assoc_resp.variable;\nnet/wireless/mlme.c:80:\t\tcr.resp_ie_len = data-\u003elen -\nnet/wireless/mlme.c-81-\t\t\t\t offsetof(struct ieee80211_mgmt,\n--\nnet/wireless/mlme.c=555=int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,\nnet/wireless/mlme.c-556-\t\t\t struct net_device *dev, const u8 *bssid,\nnet/wireless/mlme.c:557:\t\t\t const u8 *ie, int ie_len, u16 reason,\nnet/wireless/mlme.c-558-\t\t\t bool local_state_change)\n--\nnet/wireless/mlme.c-564-\t\t.ie = ie,\nnet/wireless/mlme.c:565:\t\t.ie_len = ie_len,\nnet/wireless/mlme.c-566-\t\t.local_state_change = local_state_change,\n--\nnet/wireless/mlme.c=584=int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,\nnet/wireless/mlme.c-585-\t\t\t   struct net_device *dev, const u8 *ap_addr,\nnet/wireless/mlme.c:586:\t\t\t   const u8 *ie, int ie_len, u16 reason,\nnet/wireless/mlme.c-587-\t\t\t   bool local_state_change)\n--\nnet/wireless/mlme.c-593-\t\t.ie = ie,\nnet/wireless/mlme.c:594:\t\t.ie_len = ie_len,\nnet/wireless/mlme.c-595-\t\t.ap_addr = ap_addr,\n--\nnet/wireless/nl80211.c=3056=static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/nl80211.c-3105-\t\t    nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,\nnet/wireless/nl80211.c:3106:\t\t\t\trdev-\u003ewiphy.max_scan_ie_len) ||\nnet/wireless/nl80211.c-3107-\t\t    nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,\nnet/wireless/nl80211.c:3108:\t\t\t\trdev-\u003ewiphy.max_sched_scan_ie_len) ||\nnet/wireless/nl80211.c-3109-\t\t    nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,\n--\nnet/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\n--\nnet/wireless/nl80211.c-10421-\t\tsetup-\u003eie = nla_data(ieattr);\nnet/wireless/nl80211.c:10422:\t\tsetup-\u003eie_len = nla_len(ieattr);\nnet/wireless/nl80211.c-10423-\t}\n--\nnet/wireless/nl80211.c=11105=static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-11114-\tint err, tmp, n_ssids = 0, n_channels, i;\nnet/wireless/nl80211.c:11115:\tsize_t ie_len, size;\nnet/wireless/nl80211.c-11116-\tsize_t ssids_offset, ie_offset;\n--\nnet/wireless/nl80211.c-11154-\tif (info-\u003eattrs[NL80211_ATTR_IE])\nnet/wireless/nl80211.c:11155:\t\tie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-11156-\telse\nnet/wireless/nl80211.c:11157:\t\tie_len = 0;\nnet/wireless/nl80211.c-11158-\nnet/wireless/nl80211.c:11159:\tif (ie_len \u003e wiphy-\u003emax_scan_ie_len)\nnet/wireless/nl80211.c-11160-\t\treturn -EINVAL;\n--\nnet/wireless/nl80211.c-11165-\tie_offset = size;\nnet/wireless/nl80211.c:11166:\tsize = size_add(size, ie_len);\nnet/wireless/nl80211.c-11167-\trequest = kzalloc(size, GFP_KERNEL);\n--\nnet/wireless/nl80211.c-11173-\trequest-\u003ereq.n_ssids = n_ssids;\nnet/wireless/nl80211.c:11174:\tif (ie_len)\nnet/wireless/nl80211.c-11175-\t\trequest-\u003ereq.ie = (void *)request + ie_offset;\n--\nnet/wireless/nl80211.c-11262-\tif (info-\u003eattrs[NL80211_ATTR_IE]) {\nnet/wireless/nl80211.c:11263:\t\trequest-\u003ereq.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-11264-\t\tmemcpy((void *)request-\u003ereq.ie,\nnet/wireless/nl80211.c-11265-\t\t       nla_data(info-\u003eattrs[NL80211_ATTR_IE]),\nnet/wireless/nl80211.c:11266:\t\t       request-\u003ereq.ie_len);\nnet/wireless/nl80211.c-11267-\t}\n--\nnet/wireless/nl80211.c=11459=nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,\n--\nnet/wireless/nl80211.c-11465-\tenum nl80211_band band;\nnet/wireless/nl80211.c:11466:\tsize_t ie_len, size;\nnet/wireless/nl80211.c-11467-\tstruct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];\n--\nnet/wireless/nl80211.c-11534-\tif (attrs[NL80211_ATTR_IE])\nnet/wireless/nl80211.c:11535:\t\tie_len = nla_len(attrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-11536-\telse\nnet/wireless/nl80211.c:11537:\t\tie_len = 0;\nnet/wireless/nl80211.c-11538-\nnet/wireless/nl80211.c:11539:\tif (ie_len \u003e wiphy-\u003emax_sched_scan_ie_len)\nnet/wireless/nl80211.c-11540-\t\treturn ERR_PTR(-EINVAL);\n--\nnet/wireless/nl80211.c-11580-\t\t\t\t\t n_plans));\nnet/wireless/nl80211.c:11581:\tsize = size_add(size, ie_len);\nnet/wireless/nl80211.c-11582-\trequest = kzalloc(size, GFP_KERNEL);\n--\nnet/wireless/nl80211.c-11590-\trequest-\u003en_ssids = n_ssids;\nnet/wireless/nl80211.c:11591:\tif (ie_len) {\nnet/wireless/nl80211.c-11592-\t\tif (n_ssids)\n--\nnet/wireless/nl80211.c-11599-\t\tif (request-\u003eie)\nnet/wireless/nl80211.c:11600:\t\t\trequest-\u003ematch_sets = (void *)(request-\u003eie + ie_len);\nnet/wireless/nl80211.c-11601-\t\telse if (n_ssids)\n--\nnet/wireless/nl80211.c-11613-\telse if (request-\u003eie)\nnet/wireless/nl80211.c:11614:\t\trequest-\u003escan_plans = (void *)(request-\u003eie + ie_len);\nnet/wireless/nl80211.c-11615-\telse if (n_ssids)\n--\nnet/wireless/nl80211.c-11749-\nnet/wireless/nl80211.c:11750:\tif (ie_len) {\nnet/wireless/nl80211.c:11751:\t\trequest-\u003eie_len = ie_len;\nnet/wireless/nl80211.c-11752-\t\tmemcpy((void *)request-\u003eie,\nnet/wireless/nl80211.c-11753-\t\t       nla_data(attrs[NL80211_ATTR_IE]),\nnet/wireless/nl80211.c:11754:\t\t       request-\u003eie_len);\nnet/wireless/nl80211.c-11755-\t}\n--\nnet/wireless/nl80211.c=12610=static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-12691-\t\treq.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:12692:\t\treq.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-12693-\t}\n--\nnet/wireless/nl80211.c=13006=static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-13033-\t\treq.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:13034:\t\treq.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-13035-\nnet/wireless/nl80211.c-13036-\t\tif (cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,\nnet/wireless/nl80211.c:13037:\t\t\t\t\t   req.ie, req.ie_len)) {\nnet/wireless/nl80211.c-13038-\t\t\tNL_SET_ERR_MSG_ATTR(info-\u003eextack,\n--\nnet/wireless/nl80211.c=13252=static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-13256-\tconst u8 *ie = NULL, *bssid;\nnet/wireless/nl80211.c:13257:\tint ie_len = 0;\nnet/wireless/nl80211.c-13258-\tu16 reason_code;\n--\nnet/wireless/nl80211.c-13287-\t\tie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:13288:\t\tie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-13289-\t}\n--\nnet/wireless/nl80211.c-13292-\nnet/wireless/nl80211.c:13293:\treturn cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,\nnet/wireless/nl80211.c-13294-\t\t\t\t    local_state_change);\n--\nnet/wireless/nl80211.c=13297=static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-13301-\tconst u8 *ie = NULL, *bssid;\nnet/wireless/nl80211.c:13302:\tint ie_len = 0;\nnet/wireless/nl80211.c-13303-\tu16 reason_code;\n--\nnet/wireless/nl80211.c-13332-\t\tie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:13333:\t\tie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-13334-\t}\n--\nnet/wireless/nl80211.c-13337-\nnet/wireless/nl80211.c:13338:\treturn cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,\nnet/wireless/nl80211.c-13339-\t\t\t\t      local_state_change);\n--\nnet/wireless/nl80211.c=13370=static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-13414-\t\tibss.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:13415:\t\tibss.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-13416-\t}\n--\nnet/wireless/nl80211.c=13834=static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-13894-\t\tconnect.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:13895:\t\tconnect.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-13896-\t}\n--\nnet/wireless/nl80211.c=14084=static int nl80211_update_connect_params(struct sk_buff *skb,\n--\nnet/wireless/nl80211.c-14099-\t\tconnect.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:14100:\t\tconnect.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-14101-\t\tchanged |= UPDATE_ASSOC_IES;\n--\nnet/wireless/nl80211.c=17603=static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-17618-\tft_params.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:17619:\tft_params.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-17620-\n--\nnet/wireless/nl80211.c=18496=static int nl80211_update_owe_info(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-18514-\t\towe_info.ie = nla_data(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c:18515:\t\towe_info.ie_len = nla_len(info-\u003eattrs[NL80211_ATTR_IE]);\nnet/wireless/nl80211.c-18516-\t}\n--\nnet/wireless/nl80211.c=20495=static int nl80211_add_scan_req(struct sk_buff *msg,\n--\nnet/wireless/nl80211.c-20539-\tif (req-\u003ereq.ie \u0026\u0026\nnet/wireless/nl80211.c:20540:\t    nla_put(msg, NL80211_ATTR_IE, req-\u003ereq.ie_len, req-\u003ereq.ie))\nnet/wireless/nl80211.c-20541-\t\tgoto nla_put_failure;\n--\nnet/wireless/nl80211.c=20968=void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/nl80211.c-20994-\nnet/wireless/nl80211.c:20995:\tmsg = nlmsg_new(100 + cr-\u003ereq_ie_len + cr-\u003eresp_ie_len +\nnet/wireless/nl80211.c-20996-\t\t\tcr-\u003efils.kek_len + cr-\u003efils.pmk_len +\n--\nnet/wireless/nl80211.c-21019-\t    (cr-\u003ereq_ie \u0026\u0026\nnet/wireless/nl80211.c:21020:\t     nla_put(msg, NL80211_ATTR_REQ_IE, cr-\u003ereq_ie_len, cr-\u003ereq_ie)) ||\nnet/wireless/nl80211.c-21021-\t    (cr-\u003eresp_ie \u0026\u0026\nnet/wireless/nl80211.c:21022:\t     nla_put(msg, NL80211_ATTR_RESP_IE, cr-\u003eresp_ie_len,\nnet/wireless/nl80211.c-21023-\t\t     cr-\u003eresp_ie)) ||\n--\nnet/wireless/nl80211.c=21083=void nl80211_send_roamed(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/nl80211.c-21110-\nnet/wireless/nl80211.c:21111:\tmsg = nlmsg_new(100 + info-\u003ereq_ie_len + info-\u003eresp_ie_len +\nnet/wireless/nl80211.c-21112-\t\t\tinfo-\u003efils.kek_len + info-\u003efils.pmk_len +\n--\nnet/wireless/nl80211.c-21127-\t    (info-\u003ereq_ie \u0026\u0026\nnet/wireless/nl80211.c:21128:\t     nla_put(msg, NL80211_ATTR_REQ_IE, info-\u003ereq_ie_len,\nnet/wireless/nl80211.c-21129-\t\t     info-\u003ereq_ie)) ||\nnet/wireless/nl80211.c-21130-\t    (info-\u003eresp_ie \u0026\u0026\nnet/wireless/nl80211.c:21131:\t     nla_put(msg, NL80211_ATTR_RESP_IE, info-\u003eresp_ie_len,\nnet/wireless/nl80211.c-21132-\t\t     info-\u003eresp_ie)) ||\n--\nnet/wireless/nl80211.c=21223=void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,\nnet/wireless/nl80211.c-21224-\t\t\t       struct net_device *netdev, u16 reason,\nnet/wireless/nl80211.c:21225:\t\t\t       const u8 *ie, size_t ie_len, bool from_ap)\nnet/wireless/nl80211.c-21226-{\n--\nnet/wireless/nl80211.c-21229-\nnet/wireless/nl80211.c:21230:\tmsg = nlmsg_new(100 + ie_len, GFP_KERNEL);\nnet/wireless/nl80211.c-21231-\tif (!msg)\n--\nnet/wireless/nl80211.c-21245-\t     nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||\nnet/wireless/nl80211.c:21246:\t    (ie \u0026\u0026 nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))\nnet/wireless/nl80211.c-21247-\t\tgoto nla_put_failure;\n--\nnet/wireless/nl80211.c=21378=void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,\nnet/wireless/nl80211.c:21379:\t\t\t\t\tconst u8 *ie, size_t ie_len,\nnet/wireless/nl80211.c-21380-\t\t\t\t\tint sig_dbm, gfp_t gfp)\n--\nnet/wireless/nl80211.c-21391-\nnet/wireless/nl80211.c:21392:\tmsg = nlmsg_new(100 + ie_len, gfp);\nnet/wireless/nl80211.c-21393-\tif (!msg)\n--\nnet/wireless/nl80211.c-21404-\t    nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||\nnet/wireless/nl80211.c:21405:\t    (ie_len \u0026\u0026 ie \u0026\u0026\nnet/wireless/nl80211.c:21406:\t     nla_put(msg, NL80211_ATTR_IE, ie_len, ie)) ||\nnet/wireless/nl80211.c-21407-\t    (sig_dbm \u0026\u0026\n--\nnet/wireless/nl80211.c=23164=void cfg80211_update_owe_info_event(struct net_device *netdev,\n--\nnet/wireless/nl80211.c-23187-\nnet/wireless/nl80211.c:23188:\tif (!owe_info-\u003eie_len ||\nnet/wireless/nl80211.c:23189:\t    nla_put(msg, NL80211_ATTR_IE, owe_info-\u003eie_len, owe_info-\u003eie))\nnet/wireless/nl80211.c-23190-\t\tgoto nla_put_failure;\n--\nnet/wireless/nl80211.h=93=void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,\nnet/wireless/nl80211.h-94-\t\t\t       struct net_device *netdev, u16 reason,\nnet/wireless/nl80211.h:95:\t\t\t       const u8 *ie, size_t ie_len, bool from_ap);\nnet/wireless/nl80211.h-96-\n--\nnet/wireless/reg.c=3347=void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,\nnet/wireless/reg.c:3348:\t\t\t\tconst u8 *country_ie, u8 country_ie_len)\nnet/wireless/reg.c-3349-{\n--\nnet/wireless/reg.c-3354-\t/* IE len must be evenly divisible by 2 */\nnet/wireless/reg.c:3355:\tif (country_ie_len \u0026 0x01)\nnet/wireless/reg.c-3356-\t\treturn;\nnet/wireless/reg.c-3357-\nnet/wireless/reg.c:3358:\tif (country_ie_len \u003c IEEE80211_COUNTRY_IE_MIN_LEN)\nnet/wireless/reg.c-3359-\t\treturn;\n--\nnet/wireless/reg.h=74=void regulatory_hint_found_beacon(struct wiphy *wiphy,\n--\nnet/wireless/reg.h-84- * @country_ie: pointer to the country IE\nnet/wireless/reg.h:85: * @country_ie_len: length of the country IE\nnet/wireless/reg.h-86- *\n--\nnet/wireless/reg.h=99=void regulatory_hint_country_ie(struct wiphy *wiphy,\n--\nnet/wireless/reg.h-101-\t\t\t const u8 *country_ie,\nnet/wireless/reg.h:102:\t\t\t u8 country_ie_len);\nnet/wireless/reg.h-103-\n--\nnet/wireless/scan.c=230=static size_t cfg80211_copy_elem_with_frags(const struct element *elem,\nnet/wireless/scan.c:231:\t\t\t\t\t    const u8 *ie, size_t ie_len,\nnet/wireless/scan.c-232-\t\t\t\t\t    u8 **pos, u8 *buf, size_t buf_len)\nnet/wireless/scan.c-233-{\nnet/wireless/scan.c:234:\tif (WARN_ON((u8 *)elem \u003c ie || elem-\u003edata \u003e ie + ie_len ||\nnet/wireless/scan.c:235:\t\t    elem-\u003edata + elem-\u003edatalen \u003e ie + ie_len))\nnet/wireless/scan.c-236-\t\treturn 0;\n--\nnet/wireless/scan.c-247-\nnet/wireless/scan.c:248:\tie_len = ie + ie_len - elem-\u003edata - elem-\u003edatalen;\nnet/wireless/scan.c-249-\tie = (const u8 *)elem-\u003edata + elem-\u003edatalen;\nnet/wireless/scan.c-250-\nnet/wireless/scan.c:251:\tfor_each_element(elem, ie, ie_len) {\nnet/wireless/scan.c-252-\t\tif (elem-\u003eid != WLAN_EID_FRAGMENT)\n--\nnet/wireless/scan.c=269=cfg80211_gen_new_ie(const u8 *ie, size_t ielen,\nnet/wireless/scan.c:270:\t\t    const u8 *subie, size_t subie_len,\nnet/wireless/scan.c:271:\t\t    u8 *new_ie, size_t new_ie_len)\nnet/wireless/scan.c-272-{\n--\nnet/wireless/scan.c-279-\tnon_inherit_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,\nnet/wireless/scan.c:280:\t\t\t\t\t\t  subie, subie_len);\nnet/wireless/scan.c-281-\nnet/wireless/scan.c-282-\tmbssid_index_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, subie,\nnet/wireless/scan.c:283:\t\t\t\t\t   subie_len);\nnet/wireless/scan.c-284-\tif (mbssid_index_ie \u0026\u0026 mbssid_index_ie[1] \u003e 0 \u0026\u0026\n--\nnet/wireless/scan.c-310-\t\t/* Find first occurrence in subie */\nnet/wireless/scan.c:311:\t\tsub = cfg80211_find_elem_match(id, subie, subie_len,\nnet/wireless/scan.c-312-\t\t\t\t\t       \u0026ext_id, match_len, 0);\n--\nnet/wireless/scan.c-319-\t\t\t\t\t\t\t   \u0026pos, new_ie,\nnet/wireless/scan.c:320:\t\t\t\t\t\t\t   new_ie_len))\nnet/wireless/scan.c-321-\t\t\t\treturn 0;\n--\nnet/wireless/scan.c-337-\t\t\t\t\t\t\t   \u0026pos, new_ie,\nnet/wireless/scan.c:338:\t\t\t\t\t\t\t   new_ie_len))\nnet/wireless/scan.c-339-\t\t\t\treturn 0;\n--\nnet/wireless/scan.c-354-\t\t\tif (!cfg80211_copy_elem_with_frags(sub,\nnet/wireless/scan.c:355:\t\t\t\t\t\t\t   subie, subie_len,\nnet/wireless/scan.c-356-\t\t\t\t\t\t\t   \u0026pos, new_ie,\nnet/wireless/scan.c:357:\t\t\t\t\t\t\t   new_ie_len))\nnet/wireless/scan.c-358-\t\t\t\treturn 0;\n--\nnet/wireless/scan.c-361-\t\t\t\t\t\t       sub-\u003edata + sub-\u003edatalen,\nnet/wireless/scan.c:362:\t\t\t\t\t\t       subie_len + subie -\nnet/wireless/scan.c-363-\t\t\t\t\t\t       (sub-\u003edata +\n--\nnet/wireless/scan.c-372-\t */\nnet/wireless/scan.c:373:\tfor_each_element(sub, subie, subie_len) {\nnet/wireless/scan.c-374-\t\tif (sub-\u003eid == WLAN_EID_NON_TX_BSSID_CAP)\n--\nnet/wireless/scan.c-399-\nnet/wireless/scan.c:400:\t\tif (!cfg80211_copy_elem_with_frags(sub, subie, subie_len,\nnet/wireless/scan.c:401:\t\t\t\t\t\t   \u0026pos, new_ie, new_ie_len))\nnet/wireless/scan.c-402-\t\t\treturn 0;\n--\nnet/wireless/scan.c=844=static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/scan.c-924-\toffs_ies = size;\nnet/wireless/scan.c:925:\tsize += rdev_req-\u003ereq.ie_len;\nnet/wireless/scan.c-926-\n--\nnet/wireless/scan.c-948-\nnet/wireless/scan.c:949:\tif (rdev_req-\u003ereq.ie_len) {\nnet/wireless/scan.c-950-\t\tvoid *ie = (void *)request + offs_ies;\nnet/wireless/scan.c-951-\nnet/wireless/scan.c:952:\t\tmemcpy(ie, rdev_req-\u003ereq.ie, rdev_req-\u003ereq.ie_len);\nnet/wireless/scan.c-953-\t\trequest-\u003ereq.ie = ie;\n--\nnet/wireless/sme.c=31=struct cfg80211_conn {\n--\nnet/wireless/sme.c-49-\tconst u8 *ie;\nnet/wireless/sme.c:50:\tsize_t ie_len;\nnet/wireless/sme.c-51-\tbool auto_auth, prev_bssid_valid;\n--\nnet/wireless/sme.c=146=static int cfg80211_conn_do_work(struct wireless_dev *wdev,\n--\nnet/wireless/sme.c-194-\t\treq.ie = params-\u003eie;\nnet/wireless/sme.c:195:\t\treq.ie_len = params-\u003eie_len;\nnet/wireless/sme.c-196-\t\treq.use_mfp = params-\u003emfp != NL80211_MFP_NO;\n--\nnet/wireless/sme.c=552=static int cfg80211_sme_connect(struct wireless_dev *wdev,\n--\nnet/wireless/sme.c-585-\nnet/wireless/sme.c:586:\tif (cfg80211_sme_get_conn_ies(wdev, connect-\u003eie, connect-\u003eie_len,\nnet/wireless/sme.c-587-\t\t\t\t      \u0026wdev-\u003econn-\u003eie,\nnet/wireless/sme.c:588:\t\t\t\t      \u0026wdev-\u003econn-\u003eparams.ie_len)) {\nnet/wireless/sme.c-589-\t\tkfree(wdev-\u003econn);\n--\nnet/wireless/sme.c=735=void __cfg80211_connect_result(struct net_device *dev,\n--\nnet/wireless/sme.c-778-\t\t\tmemset(\u0026wrqu, 0, sizeof(wrqu));\nnet/wireless/sme.c:779:\t\t\twrqu.data.length = cr-\u003ereq_ie_len;\nnet/wireless/sme.c-780-\t\t\twireless_send_event(dev, IWEVASSOCREQIE, \u0026wrqu,\n--\nnet/wireless/sme.c-785-\t\t\tmemset(\u0026wrqu, 0, sizeof(wrqu));\nnet/wireless/sme.c:786:\t\t\twrqu.data.length = cr-\u003eresp_ie_len;\nnet/wireless/sme.c-787-\t\t\twireless_send_event(dev, IWEVASSOCRESPIE, \u0026wrqu,\n--\nnet/wireless/sme.c=968=void cfg80211_connect_done(struct net_device *dev,\n--\nnet/wireless/sme.c-986-\tev = kzalloc(sizeof(*ev) + (params-\u003eap_mld_addr ? ETH_ALEN : 0) +\nnet/wireless/sme.c:987:\t\t     params-\u003ereq_ie_len + params-\u003eresp_ie_len +\nnet/wireless/sme.c-988-\t\t     params-\u003efils.kek_len + params-\u003efils.pmk_len +\n--\nnet/wireless/sme.c-1006-\t}\nnet/wireless/sme.c:1007:\tif (params-\u003ereq_ie_len) {\nnet/wireless/sme.c-1008-\t\tev-\u003ecr.req_ie = next;\nnet/wireless/sme.c:1009:\t\tev-\u003ecr.req_ie_len = params-\u003ereq_ie_len;\nnet/wireless/sme.c-1010-\t\tmemcpy((void *)ev-\u003ecr.req_ie, params-\u003ereq_ie,\nnet/wireless/sme.c:1011:\t\t       params-\u003ereq_ie_len);\nnet/wireless/sme.c:1012:\t\tnext += params-\u003ereq_ie_len;\nnet/wireless/sme.c-1013-\t}\nnet/wireless/sme.c:1014:\tif (params-\u003eresp_ie_len) {\nnet/wireless/sme.c-1015-\t\tev-\u003ecr.resp_ie = next;\nnet/wireless/sme.c:1016:\t\tev-\u003ecr.resp_ie_len = params-\u003eresp_ie_len;\nnet/wireless/sme.c-1017-\t\tmemcpy((void *)ev-\u003ecr.resp_ie, params-\u003eresp_ie,\nnet/wireless/sme.c:1018:\t\t       params-\u003eresp_ie_len);\nnet/wireless/sme.c:1019:\t\tnext += params-\u003eresp_ie_len;\nnet/wireless/sme.c-1020-\t}\n--\nnet/wireless/sme.c=1079=void __cfg80211_roamed(struct wireless_dev *wdev,\n--\nnet/wireless/sme.c-1138-\t\t\tmemset(\u0026wrqu, 0, sizeof(wrqu));\nnet/wireless/sme.c:1139:\t\t\twrqu.data.length = info-\u003ereq_ie_len;\nnet/wireless/sme.c-1140-\t\t\twireless_send_event(wdev-\u003enetdev, IWEVASSOCREQIE,\n--\nnet/wireless/sme.c-1145-\t\t\tmemset(\u0026wrqu, 0, sizeof(wrqu));\nnet/wireless/sme.c:1146:\t\t\twrqu.data.length = info-\u003eresp_ie_len;\nnet/wireless/sme.c-1147-\t\t\twireless_send_event(wdev-\u003enetdev, IWEVASSOCRESPIE,\n--\nnet/wireless/sme.c=1167=void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,\n--\nnet/wireless/sme.c-1203-\nnet/wireless/sme.c:1204:\tev = kzalloc(sizeof(*ev) + info-\u003ereq_ie_len + info-\u003eresp_ie_len +\nnet/wireless/sme.c-1205-\t\t     info-\u003efils.kek_len + info-\u003efils.pmk_len +\n--\nnet/wireless/sme.c-1212-\tnext = ((u8 *)ev) + sizeof(*ev);\nnet/wireless/sme.c:1213:\tif (info-\u003ereq_ie_len) {\nnet/wireless/sme.c-1214-\t\tev-\u003erm.req_ie = next;\nnet/wireless/sme.c:1215:\t\tev-\u003erm.req_ie_len = info-\u003ereq_ie_len;\nnet/wireless/sme.c:1216:\t\tmemcpy((void *)ev-\u003erm.req_ie, info-\u003ereq_ie, info-\u003ereq_ie_len);\nnet/wireless/sme.c:1217:\t\tnext += info-\u003ereq_ie_len;\nnet/wireless/sme.c-1218-\t}\nnet/wireless/sme.c:1219:\tif (info-\u003eresp_ie_len) {\nnet/wireless/sme.c-1220-\t\tev-\u003erm.resp_ie = next;\nnet/wireless/sme.c:1221:\t\tev-\u003erm.resp_ie_len = info-\u003eresp_ie_len;\nnet/wireless/sme.c-1222-\t\tmemcpy((void *)ev-\u003erm.resp_ie, info-\u003eresp_ie,\nnet/wireless/sme.c:1223:\t\t       info-\u003eresp_ie_len);\nnet/wireless/sme.c:1224:\t\tnext += info-\u003eresp_ie_len;\nnet/wireless/sme.c-1225-\t}\n--\nnet/wireless/sme.c=1343=void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,\nnet/wireless/sme.c:1344:\t\t\t     size_t ie_len, u16 reason, bool from_ap)\nnet/wireless/sme.c-1345-{\n--\nnet/wireless/sme.c-1366-\nnet/wireless/sme.c:1367:\tnl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);\nnet/wireless/sme.c-1368-\n--\nnet/wireless/sme.c=1407=void cfg80211_disconnected(struct net_device *dev, u16 reason,\nnet/wireless/sme.c:1408:\t\t\t   const u8 *ie, size_t ie_len,\nnet/wireless/sme.c-1409-\t\t\t   bool locally_generated, gfp_t gfp)\n--\nnet/wireless/sme.c-1415-\nnet/wireless/sme.c:1416:\tev = kzalloc(sizeof(*ev) + ie_len, gfp);\nnet/wireless/sme.c-1417-\tif (!ev)\n--\nnet/wireless/sme.c-1421-\tev-\u003edc.ie = ((u8 *)ev) + sizeof(*ev);\nnet/wireless/sme.c:1422:\tev-\u003edc.ie_len = ie_len;\nnet/wireless/sme.c:1423:\tmemcpy((void *)ev-\u003edc.ie, ie, ie_len);\nnet/wireless/sme.c-1424-\tev-\u003edc.reason = reason;\n--\nnet/wireless/trace.h=1421=TRACE_EVENT(rdev_assoc,\n--\nnet/wireless/trace.h-1431-\t\t__field(u32, flags)\nnet/wireless/trace.h:1432:\t\t__dynamic_array(u8, elements, req-\u003eie_len)\nnet/wireless/trace.h-1433-\t\t__array(u8, ht_capa, sizeof(struct ieee80211_ht_cap))\n--\nnet/wireless/trace.h-1453-\t\t\tmemcpy(__get_dynamic_array(elements),\nnet/wireless/trace.h:1454:\t\t\t       req-\u003eie, req-\u003eie_len);\nnet/wireless/trace.h-1455-\t\tmemcpy(__entry-\u003eht_capa, \u0026req-\u003eht_capa, sizeof(req-\u003eht_capa));\n--\nnet/wireless/trace.h=2504=TRACE_EVENT(rdev_update_ft_ies,\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 14358
							output: 28
							thoughts: 60
						

**Analyzing the Change to `mesh_setup`**

Okay, so this patch is changing `ie_len` within the `struct mesh_setup`. It looks like they're bumping it from a `u8` to a `size_t`. That's interesting; it's definitely a size increase, so I need to understand why. The struct itself is defined in `include/net/cfg80211.h`. Right, that's the wireless configuration and control interface – makes sense. Now, the key is understanding the implications of that change. I need to figure out where `mesh_setup` is actually *used*. That's the next step; understanding the context of that field will clarify the motivation behind the patch. Let's start looking for those usages to see what's going on.

{
  "Expression": "struct mesh_setup",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/core.c=1704=static int cfg80211_netdev_notifier_call(struct notifier_block *nb,\n--\nnet/wireless/core.c-1790-\t\t\t\t/* backward compat code... */\nnet/wireless/core.c:1791:\t\t\t\tstruct mesh_setup setup;\nnet/wireless/core.c-1792-\t\t\t\tmemcpy(\u0026setup, \u0026default_mesh_setup,\n--\nnet/wireless/core.h=353=extern const struct mesh_config default_mesh_config;\nnet/wireless/core.h:354:extern const struct mesh_setup default_mesh_setup;\nnet/wireless/core.h-355-int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,\nnet/wireless/core.h-356-\t\t\t struct net_device *dev,\nnet/wireless/core.h:357:\t\t\t struct mesh_setup *setup,\nnet/wireless/core.h-358-\t\t\t const struct mesh_config *conf);\n--\nnet/wireless/mesh.c=57=const struct mesh_config default_mesh_config = {\n--\nnet/wireless/mesh.c-87-\nnet/wireless/mesh.c:88:const struct mesh_setup default_mesh_setup = {\nnet/wireless/mesh.c-89-\t/* cfg80211_join_mesh() will pick a channel if needed */\n--\nnet/wireless/mesh.c=102=int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,\nnet/wireless/mesh.c-103-\t\t\t struct net_device *dev,\nnet/wireless/mesh.c:104:\t\t\t struct mesh_setup *setup,\nnet/wireless/mesh.c-105-\t\t\t const struct mesh_config *conf)\n--\nnet/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\nnet/wireless/nl80211.c:10390:\t\t\t\t     struct mesh_setup *setup)\nnet/wireless/nl80211.c-10391-{\n--\nnet/wireless/nl80211.c=15102=static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-15106-\tstruct mesh_config cfg;\nnet/wireless/nl80211.c:15107:\tstruct mesh_setup setup;\nnet/wireless/nl80211.c-15108-\tint err;\n--\nnet/wireless/rdev-ops.h=354=static inline int rdev_join_mesh(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/rdev-ops.h-356-\t\t\t\t const struct mesh_config *conf,\nnet/wireless/rdev-ops.h:357:\t\t\t\t const struct mesh_setup *setup)\nnet/wireless/rdev-ops.h-358-{\n--\nnet/wireless/trace.h=1268=TRACE_EVENT(rdev_join_mesh,\n--\nnet/wireless/trace.h-1270-\t\t const struct mesh_config *conf,\nnet/wireless/trace.h:1271:\t\t const struct mesh_setup *setup),\nnet/wireless/trace.h-1272-\tTP_ARGS(wiphy, netdev, conf, setup),\n"
}

gemini-3.1-pro-preview

null

null

							input: 15539
							output: 36
							thoughts: 18
						

Okay, let's dive into this. Here's my understanding, presented as my own mental processing:

**Analyzing `nl80211_parse_mesh_setup`**

Alright, time to get to it. Let's see what's going on with this `nl80211_parse_mesh_setup` function. I need to understand what it's responsible for. My immediate assumption is that it's handling the parsing of some sort of configuration setup related to mesh networking, likely within the context of the nl80211 wireless subsystem. The name is pretty descriptive, so that's a good start. I'll need to look closely at its input parameters - what information is being passed to it, and how is it structured? I'm expecting this will involve some sort of netlink message, since we're dealing with nl80211. And from there, it's a matter of deconstructing the code; seeing how the data is extracted, validated, and translated into internal mesh setup parameters. I want to see how robust the error handling is. Are there sanity checks in place? What kinds of data structures are being used to store the parsed mesh setup information, and how are they linked to the rest of the wireless stack? This is crucial for evaluating its integration and potential impact on other components. Any flags, options or other specific details on how this function behaves, especially with different combinations of parameters, is going to be important to note. Let's dig in.

{
  "Expression": "nl80211_parse_mesh_setup",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/nl80211.c=10250=do {\t\t\t\t\t\t\t\t\t\\\n--\nnet/wireless/nl80211.c-10388-\nnet/wireless/nl80211.c:10389:static int nl80211_parse_mesh_setup(struct genl_info *info,\nnet/wireless/nl80211.c-10390-\t\t\t\t     struct mesh_setup *setup)\n--\nnet/wireless/nl80211.c=15102=static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-15152-\t\t/* parse additional setup parameters if given */\nnet/wireless/nl80211.c:15153:\t\terr = nl80211_parse_mesh_setup(info, \u0026setup);\nnet/wireless/nl80211.c-15154-\t\tif (err)\n"
}

gemini-3.1-pro-preview

null

null

							input: 16191
							output: 42
							thoughts: 33
						

Okay, let's dive into this. Here's my take on those thoughts, as though they were my own:

**Analyzing the nl80211 Mesh Setup Parsing Function**

Right, let's take a look at `nl80211_parse_mesh_setup`. I need to understand how the kernel handles the configuration of mesh networks, particularly how it parses the setup data. This likely involves handling various attributes within the Netlink messages that define the mesh parameters. I'll be focused on how the data structures are defined, how the validation is performed, and ultimately, how the mesh setup information gets translated into actionable kernel configurations. I anticipate there'll be a need to check things like security settings, routing protocols, and channel assignments. I also wonder about how error handling is implemented if the parsing fails or the configuration is invalid. Basically, I want to trace the flow from the user space configuration down to the actual system state, focusing on this specific function as the linchpin.

{
  "File": "net/wireless/nl80211.c",
  "FirstLine": 10389,
  "LineCount": 50
}

{
  "Contents": "10389:\tstatic int nl80211_parse_mesh_setup(struct genl_info *info,\n10390:\t\t\t\t\t     struct mesh_setup *setup)\n10391:\t{\n10392:\t\tstruct cfg80211_registered_device *rdev = info-\u003euser_ptr[0];\n10393:\t\tstruct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];\n10394:\t\n10395:\t\tif (!info-\u003eattrs[NL80211_ATTR_MESH_SETUP])\n10396:\t\t\treturn -EINVAL;\n10397:\t\tif (nla_parse_nested_deprecated(tb, NL80211_MESH_SETUP_ATTR_MAX, info-\u003eattrs[NL80211_ATTR_MESH_SETUP], nl80211_mesh_setup_params_policy, info-\u003eextack))\n10398:\t\t\treturn -EINVAL;\n10399:\t\n10400:\t\tif (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])\n10401:\t\t\tsetup-\u003esync_method =\n10402:\t\t\t(nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?\n10403:\t\t\t IEEE80211_SYNC_METHOD_VENDOR :\n10404:\t\t\t IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;\n10405:\t\n10406:\t\tif (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])\n10407:\t\t\tsetup-\u003epath_sel_proto =\n10408:\t\t\t(nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?\n10409:\t\t\t IEEE80211_PATH_PROTOCOL_VENDOR :\n10410:\t\t\t IEEE80211_PATH_PROTOCOL_HWMP;\n10411:\t\n10412:\t\tif (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])\n10413:\t\t\tsetup-\u003epath_metric =\n10414:\t\t\t(nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?\n10415:\t\t\t IEEE80211_PATH_METRIC_VENDOR :\n10416:\t\t\t IEEE80211_PATH_METRIC_AIRTIME;\n10417:\t\n10418:\t\tif (tb[NL80211_MESH_SETUP_IE]) {\n10419:\t\t\tstruct nlattr *ieattr =\n10420:\t\t\t\ttb[NL80211_MESH_SETUP_IE];\n10421:\t\t\tsetup-\u003eie = nla_data(ieattr);\n10422:\t\t\tsetup-\u003eie_len = nla_len(ieattr);\n10423:\t\t}\n10424:\t\tif (tb[NL80211_MESH_SETUP_USERSPACE_MPM] \u0026\u0026\n10425:\t\t    !(rdev-\u003ewiphy.features \u0026 NL80211_FEATURE_USERSPACE_MPM))\n10426:\t\t\treturn -EINVAL;\n10427:\t\tsetup-\u003euser_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);\n10428:\t\tsetup-\u003eis_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);\n10429:\t\tsetup-\u003eis_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);\n10430:\t\tif (setup-\u003eis_secure)\n10431:\t\t\tsetup-\u003euser_mpm = true;\n10432:\t\n10433:\t\tif (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {\n10434:\t\t\tif (!setup-\u003euser_mpm)\n10435:\t\t\t\treturn -EINVAL;\n10436:\t\t\tsetup-\u003eauth_id =\n10437:\t\t\t\tnla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);\n10438:\t\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 17622
							output: 29
							thoughts: 122
						

**Analyzing the Implications of the `ie_len` Patch**

Okay, so this patch is switching `ie_len` from a `u8` to `size_t`. That's a pretty significant shift functionally, because `nla_len(ieattr)` – which is what's providing the length – is returning an `int`, and previously, that `int` was getting chopped down to just a byte (0-255). Now, with `size_t`, we can accommodate much larger lengths.

My initial thought is, "fuzzing potential!" This immediately flags for me the possibility of triggering overflows or out-of-bounds read/write scenarios, especially given the increased length now allowed. If we can craft inputs that exploit this, it's a ripe area for vulnerability discovery. The next logical step is to track down all the places where `setup->ie_len` is used. We need to follow the data flow and see where this larger value is being processed. Time to dig in and see where this change could introduce some fun, or some potential problems.

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\n--\nnet/wireless/nl80211.c-10421-\t\tsetup-\u003eie = nla_data(ieattr);\nnet/wireless/nl80211.c:10422:\t\tsetup-\u003eie_len = nla_len(ieattr);\nnet/wireless/nl80211.c-10423-\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 18149
							output: 34
							thoughts: 48
						

Okay, let's see... I'm looking at this `net/wireless/mesh.c` file and specifically at `__cfg80211_join_mesh`. I'm curious about how it's being used. The code shows that the `setup` argument is passed into `__cfg80211_join_mesh`. That's interesting, so I think I should check the implementation of that function to understand how it's using that `setup` parameter. Let's dig deeper into that function.

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/mac80211/"
}

{
  "Output": "net/mac80211/cfg.c=3119=static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,\n--\nnet/mac80211/cfg.c-3129-\nnet/mac80211/cfg.c:3130:\tif (setup-\u003eie_len) {\nnet/mac80211/cfg.c:3131:\t\tnew_ie = kmemdup(setup-\u003eie, setup-\u003eie_len,\nnet/mac80211/cfg.c-3132-\t\t\t\tGFP_KERNEL);\n--\nnet/mac80211/cfg.c-3135-\t}\nnet/mac80211/cfg.c:3136:\tifmsh-\u003eie_len = setup-\u003eie_len;\nnet/mac80211/cfg.c-3137-\tifmsh-\u003eie = new_ie;\n"
}

gemini-3.1-pro-preview

null

null

							input: 18601
							output: 32
							thoughts: 48
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Digging into the IE Lengths in mac80211**

Right, so I see `net/mac80211/cfg.c` is using `setup->ie_len`. That immediately triggers a mental cross-reference. I need to understand how *that* relates to the other places we manage Information Element (IE) lengths within mac80211. Specifically, I should check the context of `ifmsh->ie_len`. I'm already anticipating potential synchronization issues or perhaps nuanced differences in how we're tracking IE lengths in the Mesh point setup versus a more general station context. I want to see if this is consistent, if we have a central definition, or if there's a good reason for a separate variable in that structure. I'll need to trace the usage of both of these variables and ensure there aren't conflicting definitions or unexpected interpretations. The interaction with the mesh point setup is always a source of careful analysis, as it can often introduce complexities that the general setup avoids.

{
  "Expression": "ie_len",
  "PathPrefix": "net/mac80211/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 611 lines.\nUse more precise expression if possible.\n\nnet/mac80211/cfg.c=3119=static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,\n--\nnet/mac80211/cfg.c-3129-\nnet/mac80211/cfg.c:3130:\tif (setup-\u003eie_len) {\nnet/mac80211/cfg.c:3131:\t\tnew_ie = kmemdup(setup-\u003eie, setup-\u003eie_len,\nnet/mac80211/cfg.c-3132-\t\t\t\tGFP_KERNEL);\n--\nnet/mac80211/cfg.c-3135-\t}\nnet/mac80211/cfg.c:3136:\tifmsh-\u003eie_len = setup-\u003eie_len;\nnet/mac80211/cfg.c-3137-\tifmsh-\u003eie = new_ie;\n--\nnet/mac80211/ibss.c=38=ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/ibss.c-67-\t\t    2 + sizeof(struct ieee80211_vht_operation) +\nnet/mac80211/ibss.c:68:\t\t    ifibss-\u003eie_len;\nnet/mac80211/ibss.c-69-\tpresp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL);\n--\nnet/mac80211/ibss.c-162-\nnet/mac80211/ibss.c:163:\tif (ifibss-\u003eie_len) {\nnet/mac80211/ibss.c:164:\t\tmemcpy(pos, ifibss-\u003eie, ifibss-\u003eie_len);\nnet/mac80211/ibss.c:165:\t\tpos += ifibss-\u003eie_len;\nnet/mac80211/ibss.c-166-\t}\n--\nnet/mac80211/ibss.c=1681=int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/ibss.c-1738-\tif (params-\u003eie) {\nnet/mac80211/ibss.c:1739:\t\tsdata-\u003eu.ibss.ie = kmemdup(params-\u003eie, params-\u003eie_len,\nnet/mac80211/ibss.c-1740-\t\t\t\t\t   GFP_KERNEL);\nnet/mac80211/ibss.c-1741-\t\tif (sdata-\u003eu.ibss.ie)\nnet/mac80211/ibss.c:1742:\t\t\tsdata-\u003eu.ibss.ie_len = params-\u003eie_len;\nnet/mac80211/ibss.c-1743-\t}\n--\nnet/mac80211/ibss.c=1782=int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)\n--\nnet/mac80211/ibss.c-1792-\tsdata-\u003eu.ibss.ie = NULL;\nnet/mac80211/ibss.c:1793:\tsdata-\u003eu.ibss.ie_len = 0;\nnet/mac80211/ibss.c-1794-\n--\nnet/mac80211/ieee80211_i.h=443=struct ieee80211_mgd_assoc_data {\n--\nnet/mac80211/ieee80211_i.h-488-\nnet/mac80211/ieee80211_i.h:489:\tsize_t ie_len;\nnet/mac80211/ieee80211_i.h-490-\tu8 *ie_pos; /* used to fill ie[] with link[].elems */\n--\nnet/mac80211/ieee80211_i.h=655=struct ieee80211_if_ibss {\n--\nnet/mac80211/ieee80211_i.h-671-\tu8 ssid[IEEE80211_MAX_SSID_LEN];\nnet/mac80211/ieee80211_i.h:672:\tu8 ssid_len, ie_len;\nnet/mac80211/ieee80211_i.h-673-\tu8 *ie;\n--\nnet/mac80211/ieee80211_i.h=770=struct ieee80211_if_mesh {\n--\nnet/mac80211/ieee80211_i.h-814-\tconst u8 *ie;\nnet/mac80211/ieee80211_i.h:815:\tu8 ie_len;\nnet/mac80211/ieee80211_i.h-816-\tenum {\n--\nnet/mac80211/ieee80211_i.h=2704=int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,\n--\nnet/mac80211/ieee80211_i.h-2706-\t\t\t     struct ieee80211_scan_ies *ie_desc,\nnet/mac80211/ieee80211_i.h:2707:\t\t\t     const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2708-\t\t\t     u8 bands_used, u32 *rate_masks,\n--\nnet/mac80211/ieee80211_i.h=2711=struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/ieee80211_i.h-2715-\t\t\t\t\t  const u8 *ssid, size_t ssid_len,\nnet/mac80211/ieee80211_i.h:2716:\t\t\t\t\t  const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2717-\t\t\t\t\t  u32 flags);\n--\nnet/mac80211/ieee80211_i.h=2739=u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,\nnet/mac80211/ieee80211_i.h-2740-\t\t\t\tconst struct cfg80211_chan_def *chandef);\nnet/mac80211/ieee80211_i.h:2741:u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2742-u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef);\n--\nnet/mac80211/ieee80211_i.h=2953=void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);\nnet/mac80211/ieee80211_i.h-2954-\nnet/mac80211/ieee80211_i.h:2955:u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2956-\n--\nnet/mac80211/main.c=1138=int ieee80211_register_hw(struct ieee80211_hw *hw)\n--\nnet/mac80211/main.c-1470-\t\tlocal-\u003ehw.wiphy-\u003emax_scan_ssids = 4;\nnet/mac80211/main.c:1471:\t\tlocal-\u003ehw.wiphy-\u003emax_scan_ie_len = IEEE80211_MAX_DATA_LEN;\nnet/mac80211/main.c-1472-\t}\n--\nnet/mac80211/main.c-1480-\t */\nnet/mac80211/main.c:1481:\tif (local-\u003ehw.wiphy-\u003emax_scan_ie_len)\nnet/mac80211/main.c:1482:\t\tlocal-\u003ehw.wiphy-\u003emax_scan_ie_len -= local-\u003escan_ies_len;\nnet/mac80211/main.c-1483-\n--\nnet/mac80211/mesh.c=353=int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh.c-359-\nnet/mac80211/mesh.c:360:\tif (!ifmsh-\u003eie || !ifmsh-\u003eie_len)\nnet/mac80211/mesh.c-361-\t\treturn 0;\n--\nnet/mac80211/mesh.c-363-\t/* fast-forward to vendor IEs */\nnet/mac80211/mesh.c:364:\toffset = ieee80211_ie_split_vendor(ifmsh-\u003eie, ifmsh-\u003eie_len, 0);\nnet/mac80211/mesh.c-365-\nnet/mac80211/mesh.c:366:\tif (offset \u003c ifmsh-\u003eie_len) {\nnet/mac80211/mesh.c:367:\t\tlen = ifmsh-\u003eie_len - offset;\nnet/mac80211/mesh.c-368-\t\tdata = ifmsh-\u003eie + offset;\n--\nnet/mac80211/mesh.c=377=int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)\n--\nnet/mac80211/mesh.c-382-\nnet/mac80211/mesh.c:383:\tif (!ifmsh-\u003eie || !ifmsh-\u003eie_len)\nnet/mac80211/mesh.c-384-\t\treturn 0;\n--\nnet/mac80211/mesh.c-386-\t/* find RSN IE */\nnet/mac80211/mesh.c:387:\tdata = cfg80211_find_ie(WLAN_EID_RSN, ifmsh-\u003eie, ifmsh-\u003eie_len);\nnet/mac80211/mesh.c-388-\tif (!data)\n--\nnet/mac80211/mesh.c=562=int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,\nnet/mac80211/mesh.c:563:\t\t       struct sk_buff *skb, u8 ie_len)\nnet/mac80211/mesh.c-564-{\n--\nnet/mac80211/mesh.c=630=int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,\nnet/mac80211/mesh.c:631:\t\t\tstruct sk_buff *skb, u8 ie_len)\nnet/mac80211/mesh.c-632-{\n--\nnet/mac80211/mesh.c=704=ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata,\nnet/mac80211/mesh.c:705:\t\t\t\t u8 *ie, u8 ie_len)\nnet/mac80211/mesh.c-706-{\n--\nnet/mac80211/mesh.c-720-\nnet/mac80211/mesh.c:721:\tcap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len);\nnet/mac80211/mesh.c-722-\tif (cap \u0026\u0026 cap-\u003edatalen \u003e= 1 + sizeof(*he_oper) \u0026\u0026\n--\nnet/mac80211/mesh.c=935=ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)\n--\nnet/mac80211/mesh.c-942-\tconst struct ieee80211_supported_band *sband;\nnet/mac80211/mesh.c:943:\tu8 ie_len_he_cap, ie_len_eht_cap;\nnet/mac80211/mesh.c-944-\tu8 *pos;\n--\nnet/mac80211/mesh.c-951-\nnet/mac80211/mesh.c:952:\tie_len_he_cap = ieee80211_ie_len_he_cap(sdata);\nnet/mac80211/mesh.c:953:\tie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata);\nnet/mac80211/mesh.c-954-\thead_len = hdr_len +\n--\nnet/mac80211/mesh.c-972-\t\t   2 + sizeof(struct ieee80211_vht_operation) +\nnet/mac80211/mesh.c:973:\t\t   ie_len_he_cap +\nnet/mac80211/mesh.c-974-\t\t   2 + 1 + sizeof(struct ieee80211_he_operation) +\n--\nnet/mac80211/mesh.c-976-\t\t   2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +\nnet/mac80211/mesh.c:977:\t\t   ie_len_eht_cap +\nnet/mac80211/mesh.c-978-\t\t   2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +\nnet/mac80211/mesh.c-979-\t\t\t   offsetof(struct ieee80211_eht_operation_info, optional) +\nnet/mac80211/mesh.c:980:\t\t   ifmsh-\u003eie_len;\nnet/mac80211/mesh.c-981-\n--\nnet/mac80211/mesh.c-1016-\t\tstruct cfg80211_chan_def *chandef;\nnet/mac80211/mesh.c:1017:\t\tint ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +\nnet/mac80211/mesh.c-1018-\t\t\t     2 + sizeof(struct ieee80211_mesh_chansw_params_ie);\nnet/mac80211/mesh.c-1019-\nnet/mac80211/mesh.c:1020:\t\tpos = skb_put_zero(skb, ie_len);\nnet/mac80211/mesh.c-1021-\t\t*pos++ = WLAN_EID_CHANNEL_SWITCH;\n--\nnet/mac80211/mesh.c-1045-\t\tcase NL80211_CHAN_WIDTH_40:\nnet/mac80211/mesh.c:1046:\t\t\tie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);\nnet/mac80211/mesh.c:1047:\t\t\tpos = skb_put_zero(skb, ie_len);\nnet/mac80211/mesh.c-1048-\n--\nnet/mac80211/mesh.c-1060-\t\t\t/* Channel Switch Wrapper + Wide Bandwidth CSA IE */\nnet/mac80211/mesh.c:1061:\t\t\tie_len = 2 + 2 +\nnet/mac80211/mesh.c-1062-\t\t\t\t sizeof(struct ieee80211_wide_bw_chansw_ie);\nnet/mac80211/mesh.c:1063:\t\t\tpos = skb_put_zero(skb, ie_len);\nnet/mac80211/mesh.c-1064-\n--\nnet/mac80211/mesh.c-1100-\t    mesh_add_vht_oper_ie(sdata, skb) ||\nnet/mac80211/mesh.c:1101:\t    mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||\nnet/mac80211/mesh.c-1102-\t    mesh_add_he_oper_ie(sdata, skb) ||\nnet/mac80211/mesh.c-1103-\t    mesh_add_he_6ghz_cap_ie(sdata, skb) ||\nnet/mac80211/mesh.c:1104:\t    mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) ||\nnet/mac80211/mesh.c-1105-\t    mesh_add_eht_oper_ie(sdata, skb) ||\n--\nnet/mac80211/mesh.h=261=int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,\nnet/mac80211/mesh.h:262:\t\t       struct sk_buff *skb, u8 ie_len);\nnet/mac80211/mesh.h-263-int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh.h=267=int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,\nnet/mac80211/mesh.h:268:\t\t\tstruct sk_buff *skb, u8 ie_len);\nnet/mac80211/mesh.h-269-int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh_hwmp.c=55=static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,\n--\nnet/mac80211/mesh_hwmp.c-66-\tstruct ieee80211_mgmt *mgmt;\nnet/mac80211/mesh_hwmp.c:67:\tu8 *pos, ie_len;\nnet/mac80211/mesh_hwmp.c-68-\n--\nnet/mac80211/mesh_hwmp.c-88-\t\tmhwmp_dbg(sdata, \"sending PREQ to %pM\\n\", target);\nnet/mac80211/mesh_hwmp.c:89:\t\tie_len = 37;\nnet/mac80211/mesh_hwmp.c:90:\t\tpos = skb_put(skb, 2 + ie_len);\nnet/mac80211/mesh_hwmp.c-91-\t\t*pos++ = WLAN_EID_PREQ;\n--\nnet/mac80211/mesh_hwmp.c-94-\t\tmhwmp_dbg(sdata, \"sending PREP to %pM\\n\", orig_addr);\nnet/mac80211/mesh_hwmp.c:95:\t\tie_len = 31;\nnet/mac80211/mesh_hwmp.c:96:\t\tpos = skb_put(skb, 2 + ie_len);\nnet/mac80211/mesh_hwmp.c-97-\t\t*pos++ = WLAN_EID_PREP;\n--\nnet/mac80211/mesh_hwmp.c-100-\t\tmhwmp_dbg(sdata, \"sending RANN from %pM\\n\", orig_addr);\nnet/mac80211/mesh_hwmp.c:101:\t\tie_len = sizeof(struct ieee80211_rann_ie);\nnet/mac80211/mesh_hwmp.c:102:\t\tpos = skb_put(skb, 2 + ie_len);\nnet/mac80211/mesh_hwmp.c-103-\t\t*pos++ = WLAN_EID_RANN;\n--\nnet/mac80211/mesh_hwmp.c-108-\t}\nnet/mac80211/mesh_hwmp.c:109:\t*pos++ = ie_len;\nnet/mac80211/mesh_hwmp.c-110-\t*pos++ = flags;\n--\nnet/mac80211/mesh_hwmp.c=189=int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh_hwmp.c-197-\tstruct ieee80211_mgmt *mgmt;\nnet/mac80211/mesh_hwmp.c:198:\tu8 *pos, ie_len;\nnet/mac80211/mesh_hwmp.c-199-\n--\nnet/mac80211/mesh_hwmp.c-220-\tmgmt-\u003eu.action.action_code = WLAN_MESH_ACTION_HWMP_PATH_SELECTION;\nnet/mac80211/mesh_hwmp.c:221:\tie_len = 15;\nnet/mac80211/mesh_hwmp.c:222:\tpos = skb_put(skb, 2 + ie_len);\nnet/mac80211/mesh_hwmp.c-223-\t*pos++ = WLAN_EID_PERR;\nnet/mac80211/mesh_hwmp.c:224:\t*pos++ = ie_len;\nnet/mac80211/mesh_hwmp.c-225-\t/* ttl */\n--\nnet/mac80211/mesh_plink.c=211=static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh_plink.c-222-\tu16 peering_proto = 0;\nnet/mac80211/mesh_plink.c:223:\tu8 *pos, ie_len = 4;\nnet/mac80211/mesh_plink.c:224:\tu8 ie_len_he_cap, ie_len_eht_cap;\nnet/mac80211/mesh_plink.c-225-\tint err = -ENOMEM;\nnet/mac80211/mesh_plink.c-226-\nnet/mac80211/mesh_plink.c:227:\tie_len_he_cap = ieee80211_ie_len_he_cap(sdata);\nnet/mac80211/mesh_plink.c:228:\tie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata);\nnet/mac80211/mesh_plink.c-229-\tskb = dev_alloc_skb(local-\u003etx_headroom +\n--\nnet/mac80211/mesh_plink.c-240-\t\t\t    2 + sizeof(struct ieee80211_vht_operation) +\nnet/mac80211/mesh_plink.c:241:\t\t\t    ie_len_he_cap +\nnet/mac80211/mesh_plink.c-242-\t\t\t    2 + 1 + sizeof(struct ieee80211_he_operation) +\n--\nnet/mac80211/mesh_plink.c-244-\t\t\t    2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +\nnet/mac80211/mesh_plink.c:245:\t\t\t    ie_len_eht_cap +\nnet/mac80211/mesh_plink.c-246-\t\t\t    2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +\n--\nnet/mac80211/mesh_plink.c-248-\t\t\t    2 + 8 + /* peering IE */\nnet/mac80211/mesh_plink.c:249:\t\t\t    sdata-\u003eu.mesh.ie_len);\nnet/mac80211/mesh_plink.c-250-\tif (!skb)\n--\nnet/mac80211/mesh_plink.c-301-\tcase WLAN_SP_MESH_PEERING_CONFIRM:\nnet/mac80211/mesh_plink.c:302:\t\tie_len += 2;\nnet/mac80211/mesh_plink.c-303-\t\tinclude_plid = true;\n--\nnet/mac80211/mesh_plink.c-306-\t\tif (plid) {\nnet/mac80211/mesh_plink.c:307:\t\t\tie_len += 2;\nnet/mac80211/mesh_plink.c-308-\t\t\tinclude_plid = true;\nnet/mac80211/mesh_plink.c-309-\t\t}\nnet/mac80211/mesh_plink.c:310:\t\tie_len += 2;\t/* reason code */\nnet/mac80211/mesh_plink.c-311-\t\tbreak;\n--\nnet/mac80211/mesh_plink.c-316-\nnet/mac80211/mesh_plink.c:317:\tif (WARN_ON(skb_tailroom(skb) \u003c 2 + ie_len))\nnet/mac80211/mesh_plink.c-318-\t\tgoto free;\nnet/mac80211/mesh_plink.c-319-\nnet/mac80211/mesh_plink.c:320:\tpos = skb_put(skb, 2 + ie_len);\nnet/mac80211/mesh_plink.c-321-\t*pos++ = WLAN_EID_PEER_MGMT;\nnet/mac80211/mesh_plink.c:322:\t*pos++ = ie_len;\nnet/mac80211/mesh_plink.c-323-\tmemcpy(pos, \u0026peering_proto, 2);\n--\nnet/mac80211/mesh_plink.c-340-\t\t    mesh_add_vht_oper_ie(sdata, skb) ||\nnet/mac80211/mesh_plink.c:341:\t\t    mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||\nnet/mac80211/mesh_plink.c-342-\t\t    mesh_add_he_oper_ie(sdata, skb) ||\nnet/mac80211/mesh_plink.c-343-\t\t    mesh_add_he_6ghz_cap_ie(sdata, skb) ||\nnet/mac80211/mesh_plink.c:344:\t\t    mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) ||\nnet/mac80211/mesh_plink.c-345-\t\t    mesh_add_eht_oper_ie(sdata, skb))\n--\nnet/mac80211/mesh_plink.c=1029=mesh_plink_get_event(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh_plink.c-1035-\tenum plink_event event = PLINK_UNDEFINED;\nnet/mac80211/mesh_plink.c:1036:\tu8 ie_len = elems-\u003epeering_len;\nnet/mac80211/mesh_plink.c-1037-\tbool matches_local;\n--\nnet/mac80211/mesh_plink.c-1104-\t\t\tevent = CLS_IGNR;\nnet/mac80211/mesh_plink.c:1105:\t\telse if (ie_len == 8 \u0026\u0026 sta-\u003emesh-\u003ellid != llid)\nnet/mac80211/mesh_plink.c-1106-\t\t\tevent = CLS_IGNR;\n--\nnet/mac80211/mesh_plink.c=1120=mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mesh_plink.c-1129-\tu64 changed = 0;\nnet/mac80211/mesh_plink.c:1130:\tu8 ie_len = elems-\u003epeering_len;\nnet/mac80211/mesh_plink.c-1131-\tu16 plid, llid = 0;\n--\nnet/mac80211/mesh_plink.c-1146-\tftype = mgmt-\u003eu.action.action_code;\nnet/mac80211/mesh_plink.c:1147:\tif ((ftype == WLAN_SP_MESH_PEERING_OPEN \u0026\u0026 ie_len != 4) ||\nnet/mac80211/mesh_plink.c:1148:\t    (ftype == WLAN_SP_MESH_PEERING_CONFIRM \u0026\u0026 ie_len != 6) ||\nnet/mac80211/mesh_plink.c:1149:\t    (ftype == WLAN_SP_MESH_PEERING_CLOSE \u0026\u0026 ie_len != 6\nnet/mac80211/mesh_plink.c:1150:\t\t\t\t\t\t\t\u0026\u0026 ie_len != 8)) {\nnet/mac80211/mesh_plink.c-1151-\t\tmpl_dbg(sdata,\nnet/mac80211/mesh_plink.c-1152-\t\t\t\"Mesh plink: incorrect plink ie length %d %d\\n\",\nnet/mac80211/mesh_plink.c:1153:\t\t\tftype, ie_len);\nnet/mac80211/mesh_plink.c-1154-\t\treturn;\n--\nnet/mac80211/mesh_plink.c-1166-\tif (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||\nnet/mac80211/mesh_plink.c:1167:\t    (ftype == WLAN_SP_MESH_PEERING_CLOSE \u0026\u0026 ie_len == 8))\nnet/mac80211/mesh_plink.c-1168-\t\tllid = get_unaligned_le16(PLINK_GET_PLID(elems-\u003epeering));\n--\nnet/mac80211/mlme.c=2582=static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)\n--\nnet/mac80211/mlme.c-2605-\t/* we know it's writable, cast away the const */\nnet/mac80211/mlme.c:2606:\tif (assoc_data-\u003eie_len)\nnet/mac80211/mlme.c-2607-\t\text_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY,\nnet/mac80211/mlme.c-2608-\t\t\t\t\t\t      assoc_data-\u003eie,\nnet/mac80211/mlme.c:2609:\t\t\t\t\t\t      assoc_data-\u003eie_len);\nnet/mac80211/mlme.c-2610-\n--\nnet/mac80211/mlme.c-2615-\t       2 + assoc_data-\u003essid_len + /* SSID */\nnet/mac80211/mlme.c:2616:\t       assoc_data-\u003eie_len + /* extra IEs */\nnet/mac80211/mlme.c-2617-\t       (assoc_data-\u003efils_kek_len ? 16 /* AES-SIV */ : 0) +\n--\nnet/mac80211/mlme.c-2727-\t\t\t\t\t  assoc_data-\u003eie,\nnet/mac80211/mlme.c:2728:\t\t\t\t\t  assoc_data-\u003eie_len,\nnet/mac80211/mlme.c-2729-\t\t\t\t\t  assoc_data-\u003eassoc_link_id, link,\n--\nnet/mac80211/mlme.c-2733-\t/* if present, add any custom non-vendor IEs */\nnet/mac80211/mlme.c:2734:\tif (assoc_data-\u003eie_len) {\nnet/mac80211/mlme.c-2735-\t\tnoffset = ieee80211_ie_split_vendor(assoc_data-\u003eie,\nnet/mac80211/mlme.c:2736:\t\t\t\t\t\t    assoc_data-\u003eie_len,\nnet/mac80211/mlme.c-2737-\t\t\t\t\t\t    offset);\n--\nnet/mac80211/mlme.c-2754-\t/* add any remaining custom (i.e. vendor specific here) IEs */\nnet/mac80211/mlme.c:2755:\tif (assoc_data-\u003eie_len) {\nnet/mac80211/mlme.c:2756:\t\tnoffset = assoc_data-\u003eie_len;\nnet/mac80211/mlme.c-2757-\t\tskb_put_data(skb, assoc_data-\u003eie + offset, noffset - offset);\n--\nnet/mac80211/mlme.c=3596=ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel,\nnet/mac80211/mlme.c:3597:\t\t\t\t const u8 *country_ie, u8 country_ie_len,\nnet/mac80211/mlme.c-3598-\t\t\t\t const u8 *pwr_constr_elem,\n--\nnet/mac80211/mlme.c-3606-\t/* Invalid IE */\nnet/mac80211/mlme.c:3607:\tif (country_ie_len % 2 || country_ie_len \u003c IEEE80211_COUNTRY_IE_MIN_LEN)\nnet/mac80211/mlme.c-3608-\t\treturn false;\n--\nnet/mac80211/mlme.c-3610-\ttriplet = (void *)(country_ie + 3);\nnet/mac80211/mlme.c:3611:\tcountry_ie_len -= 3;\nnet/mac80211/mlme.c-3612-\n--\nnet/mac80211/mlme.c-3636-\t/* find channel */\nnet/mac80211/mlme.c:3637:\twhile (country_ie_len \u003e= 3) {\nnet/mac80211/mlme.c-3638-\t\tu8 first_channel = triplet-\u003echans.first_channel;\n--\nnet/mac80211/mlme.c-3654-\t\ttriplet++;\nnet/mac80211/mlme.c:3655:\t\tcountry_ie_len -= 3;\nnet/mac80211/mlme.c-3656-\t}\n--\nnet/mac80211/mlme.c=3679=static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link,\n--\nnet/mac80211/mlme.c-3681-\t\t\t\t       struct ieee80211_mgmt *mgmt,\nnet/mac80211/mlme.c:3682:\t\t\t\t       const u8 *country_ie, u8 country_ie_len,\nnet/mac80211/mlme.c-3683-\t\t\t\t       const u8 *pwr_constr_ie,\n--\nnet/mac80211/mlme.c-3699-\t\thas_80211h_pwr = ieee80211_find_80211h_pwr_constr(\nnet/mac80211/mlme.c:3700:\t\t\tchannel, country_ie, country_ie_len,\nnet/mac80211/mlme.c-3701-\t\t\tpwr_constr_ie, \u0026chan_pwr, \u0026pwr_reduction_80211h);\n--\nnet/mac80211/mlme.c=9846=int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mlme.c-9909-\tauth_data = kzalloc(sizeof(*auth_data) + req-\u003eauth_data_len +\nnet/mac80211/mlme.c:9910:\t\t\t    req-\u003eie_len, GFP_KERNEL);\nnet/mac80211/mlme.c-9911-\tif (!auth_data)\n--\nnet/mac80211/mlme.c-9942-\nnet/mac80211/mlme.c:9943:\tif (req-\u003eie \u0026\u0026 req-\u003eie_len) {\nnet/mac80211/mlme.c-9944-\t\tmemcpy(\u0026auth_data-\u003edata[auth_data-\u003edata_len],\nnet/mac80211/mlme.c:9945:\t\t       req-\u003eie, req-\u003eie_len);\nnet/mac80211/mlme.c:9946:\t\tauth_data-\u003edata_len += req-\u003eie_len;\nnet/mac80211/mlme.c-9947-\t}\n--\nnet/mac80211/mlme.c=10269=int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/mlme.c-10284-\tint i, err;\nnet/mac80211/mlme.c:10285:\tsize_t size = sizeof(*assoc_data) + req-\u003eie_len;\nnet/mac80211/mlme.c-10286-\n--\nnet/mac80211/mlme.c-10503-\nnet/mac80211/mlme.c:10504:\tif (req-\u003eie \u0026\u0026 req-\u003eie_len) {\nnet/mac80211/mlme.c:10505:\t\tmemcpy(assoc_data-\u003eie, req-\u003eie, req-\u003eie_len);\nnet/mac80211/mlme.c:10506:\t\tassoc_data-\u003eie_len = req-\u003eie_len;\nnet/mac80211/mlme.c:10507:\t\tassoc_data-\u003eie_pos = assoc_data-\u003eie + assoc_data-\u003eie_len;\nnet/mac80211/mlme.c-10508-\t} else {\n--\nnet/mac80211/scan.c=379=static bool ieee80211_prep_hw_scan(struct ieee80211_sub_if_data *sdata)\n--\nnet/mac80211/scan.c-432-\t\t\t\t\t \u0026local-\u003ehw_scan_req-\u003eies,\nnet/mac80211/scan.c:433:\t\t\t\t\t req-\u003eie, req-\u003eie_len,\nnet/mac80211/scan.c-434-\t\t\t\t\t bands_used, req-\u003erates, \u0026chandef,\n--\nnet/mac80211/scan.c-437-\t\treturn false;\nnet/mac80211/scan.c:438:\tlocal-\u003ehw_scan_req-\u003ereq.ie_len = ielen;\nnet/mac80211/scan.c-439-\tlocal-\u003ehw_scan_req-\u003ereq.no_cck = req-\u003eno_cck;\n--\nnet/mac80211/scan.c=660=static void ieee80211_send_scan_probe_req(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/scan.c-662-\t\t\t\t\t  const u8 *ssid, size_t ssid_len,\nnet/mac80211/scan.c:663:\t\t\t\t\t  const u8 *ie, size_t ie_len,\nnet/mac80211/scan.c-664-\t\t\t\t\t  u32 ratemask, u32 flags, u32 tx_flags,\n--\nnet/mac80211/scan.c-670-\t\t\t\t\tssid, ssid_len,\nnet/mac80211/scan.c:671:\t\t\t\t\tie, ie_len, flags);\nnet/mac80211/scan.c-672-\n--\nnet/mac80211/scan.c=689=static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,\n--\nnet/mac80211/scan.c-715-\t\t\tscan_req-\u003essids[i].ssid, scan_req-\u003essids[i].ssid_len,\nnet/mac80211/scan.c:716:\t\t\tscan_req-\u003eie, scan_req-\u003eie_len,\nnet/mac80211/scan.c-717-\t\t\tscan_req-\u003erates[band], flags,\n--\nnet/mac80211/scan.c=731=static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/scan.c-763-\nnet/mac80211/scan.c:764:\t\tlocal-\u003ehw_scan_ies_bufsize = local-\u003escan_ies_len + req-\u003eie_len;\nnet/mac80211/scan.c-765-\n--\nnet/mac80211/scan.c=1331=int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/scan.c-1344-\nnet/mac80211/scan.c:1345:\tiebufsz = local-\u003escan_ies_len + req-\u003eie_len;\nnet/mac80211/scan.c-1346-\n--\nnet/mac80211/scan.c-1370-\t\t\t\t       \u0026sched_scan_ies, req-\u003eie,\nnet/mac80211/scan.c:1371:\t\t\t\t       req-\u003eie_len, bands_used, rate_masks,\nnet/mac80211/scan.c-1372-\t\t\t\t       \u0026chandef, flags);\n--\nnet/mac80211/tdls.c=203=static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,\n--\nnet/mac80211/tdls.c-221-\tlnkid-\u003eie_type = WLAN_EID_LINK_ID;\nnet/mac80211/tdls.c:222:\tlnkid-\u003eie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;\nnet/mac80211/tdls.c-223-\n--\nnet/mac80211/util.c=1261=static int ieee80211_put_preq_ies_band(struct sk_buff *skb,\nnet/mac80211/util.c-1262-\t\t\t\t       struct ieee80211_sub_if_data *sdata,\nnet/mac80211/util.c:1263:\t\t\t\t       const u8 *ie, size_t ie_len,\nnet/mac80211/util.c-1264-\t\t\t\t       size_t *offset,\n--\nnet/mac80211/util.c-1291-\t/* insert \"request information\" if in custom IEs */\nnet/mac80211/util.c:1292:\tif (ie \u0026\u0026 ie_len) {\nnet/mac80211/util.c-1293-\t\tstatic const u8 before_extrates[] = {\n--\nnet/mac80211/util.c-1297-\t\t};\nnet/mac80211/util.c:1298:\t\tnoffset = ieee80211_ie_split(ie, ie_len,\nnet/mac80211/util.c-1299-\t\t\t\t\t     before_extrates,\n--\nnet/mac80211/util.c-1325-\t/* insert custom IEs that go before HT */\nnet/mac80211/util.c:1326:\tif (ie \u0026\u0026 ie_len) {\nnet/mac80211/util.c-1327-\t\tstatic const u8 before_ht[] = {\n--\nnet/mac80211/util.c-1334-\t\t};\nnet/mac80211/util.c:1335:\t\tnoffset = ieee80211_ie_split(ie, ie_len,\nnet/mac80211/util.c-1336-\t\t\t\t\t     before_ht, ARRAY_SIZE(before_ht),\n--\nnet/mac80211/util.c-1355-\t/* insert custom IEs that go before VHT */\nnet/mac80211/util.c:1356:\tif (ie \u0026\u0026 ie_len) {\nnet/mac80211/util.c-1357-\t\tstatic const u8 before_vht[] = {\n--\nnet/mac80211/util.c-1369-\t\t};\nnet/mac80211/util.c:1370:\t\tnoffset = ieee80211_ie_split(ie, ie_len,\nnet/mac80211/util.c-1371-\t\t\t\t\t     before_vht, ARRAY_SIZE(before_vht),\n--\nnet/mac80211/util.c-1400-\t/* insert custom IEs that go before HE */\nnet/mac80211/util.c:1401:\tif (ie \u0026\u0026 ie_len) {\nnet/mac80211/util.c-1402-\t\tstatic const u8 before_he[] = {\n--\nnet/mac80211/util.c-1410-\t\t};\nnet/mac80211/util.c:1411:\t\tnoffset = ieee80211_ie_split(ie, ie_len,\nnet/mac80211/util.c-1412-\t\t\t\t\t     before_he, ARRAY_SIZE(before_he),\n--\nnet/mac80211/util.c=1454=static int ieee80211_put_preq_ies(struct sk_buff *skb,\n--\nnet/mac80211/util.c-1456-\t\t\t\t  struct ieee80211_scan_ies *ie_desc,\nnet/mac80211/util.c:1457:\t\t\t\t  const u8 *ie, size_t ie_len,\nnet/mac80211/util.c-1458-\t\t\t\t  u8 bands_used, u32 *rate_masks,\n--\nnet/mac80211/util.c-1470-\t\t\terr = ieee80211_put_preq_ies_band(skb, sdata,\nnet/mac80211/util.c:1471:\t\t\t\t\t\t\t  ie, ie_len,\nnet/mac80211/util.c-1472-\t\t\t\t\t\t\t  \u0026custom_ie_offset,\n--\nnet/mac80211/util.c-1482-\t/* add any remaining custom IEs */\nnet/mac80211/util.c:1483:\tif (ie \u0026\u0026 ie_len) {\nnet/mac80211/util.c:1484:\t\tif (WARN_ONCE(skb_tailroom(skb) \u003c ie_len - custom_ie_offset,\nnet/mac80211/util.c-1485-\t\t\t      \"not enough space for preq custom IEs\\n\"))\n--\nnet/mac80211/util.c-1488-\t\tskb_put_data(skb, ie + custom_ie_offset,\nnet/mac80211/util.c:1489:\t\t\t     ie_len - custom_ie_offset);\nnet/mac80211/util.c:1490:\t\tie_desc-\u003ecommon_ie_len = skb_tail_pointer(skb) -\nnet/mac80211/util.c-1491-\t\t\t\t\t ie_desc-\u003ecommon_ies;\n--\nnet/mac80211/util.c=1497=int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,\n--\nnet/mac80211/util.c-1499-\t\t\t     struct ieee80211_scan_ies *ie_desc,\nnet/mac80211/util.c:1500:\t\t\t     const u8 *ie, size_t ie_len,\nnet/mac80211/util.c-1501-\t\t\t     u8 bands_used, u32 *rate_masks,\n--\nnet/mac80211/util.c-1514-\tmemset(start, 0, skb_tailroom(skb));\nnet/mac80211/util.c:1515:\tret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,\nnet/mac80211/util.c-1516-\t\t\t\t     bands_used, rate_masks, chandef,\n--\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 32586
							output: 48
							thoughts: 145
						

**Analyzing Potential Data Truncation in Mesh Network Configuration**

Okay, so I'm looking at this `ie_len` field within the `ieee80211_if_mesh` structure. It's defined as a `u8` – an 8-bit unsigned integer – at line 815 of `net/mac80211/ieee80211_i.h`. That's the key piece of information. Now, the potential issue pops up in `copy_mesh_setup`, specifically when we see `ifmsh->ie_len = setup->ie_len;`. Since `ifmsh->ie_len` is a `u8`, any assignment from `setup->ie_len` is going to automatically truncate `setup->ie_len` down to 8 bits. We're effectively losing data, potentially. I need to confirm this assumption. Let me double-check the definition of `ieee80211_i.h`.

{
  "File": "net/mac80211/ieee80211_i.h",
  "FirstLine": 800,
  "LineCount": 30
}

{
  "Contents": " 800:\t\tunsigned long next_perr;\n 801:\t\t/* Timestamp of last PREQ sent */\n 802:\t\tunsigned long last_preq;\n 803:\t\tstruct mesh_rmc *rmc;\n 804:\t\tspinlock_t mesh_preq_queue_lock;\n 805:\t\tstruct mesh_preq_queue preq_queue;\n 806:\t\tint preq_queue_len;\n 807:\t\tstruct mesh_stats mshstats;\n 808:\t\tstruct mesh_config mshcfg;\n 809:\t\tatomic_t estab_plinks;\n 810:\t\tatomic_t mesh_seqnum;\n 811:\t\tbool accepting_plinks;\n 812:\t\tint num_gates;\n 813:\t\tstruct beacon_data __rcu *beacon;\n 814:\t\tconst u8 *ie;\n 815:\t\tu8 ie_len;\n 816:\t\tenum {\n 817:\t\t\tIEEE80211_MESH_SEC_NONE = 0x0,\n 818:\t\t\tIEEE80211_MESH_SEC_AUTHED = 0x1,\n 819:\t\t\tIEEE80211_MESH_SEC_SECURED = 0x2,\n 820:\t\t} security;\n 821:\t\tbool user_mpm;\n 822:\t\t/* Extensible Synchronization Framework */\n 823:\t\tconst struct ieee80211_mesh_sync_ops *sync_ops;\n 824:\t\ts64 sync_offset_clockdrift_max;\n 825:\t\tspinlock_t sync_offset_lock;\n 826:\t\t/* mesh power save */\n 827:\t\tenum nl80211_mesh_power_mode nonpeer_pm;\n 828:\t\tint ps_peers_light_sleep;\n 829:\t\tint ps_peers_deep_sleep;\n"
}

gemini-3.1-pro-preview

null

null

							input: 33504
							output: 41
							thoughts: 254
						

**Truncation Alert: Mesh IE Length!**

Okay, so I'm looking at this `ieee80211_if_mesh` struct, and something's bugging me. Specifically, that `ie_len` field – it's still a `u8`! Now, I see that the `setup->ie_len` is a `size_t`. The whole thing is that `setup->ie_len` gets assigned to `ifmsh->ie_len`, which is clearly a truncation risk. If `setup->ie_len` is something significant, like a 65535, and then gets squeezed into an `u8`, we're losing data.

But hold on, let's trace this back. The code uses `setup->ie_len` here in `copy_mesh_setup`:

```c
	if (setup->ie_len) {
		new_ie = kmemdup(setup->ie, setup->ie_len,
				GFP_KERNEL);
```

So `kmemdup` is going to happily allocate whatever `setup->ie_len` says. So if `setup->ie_len` is huge, `kmemdup` allocates that many bytes. That's fine, until we get to `ifmsh->ie_len = setup->ie_len;` and bam, truncation. That's a problem.

Now, am I missing something? Does `setup->ie_len` actually matter elsewhere? I think I need to follow the use of `copy_mesh_setup` to see where `setup->ie_len` originates. Let's see... looking at `net/mac80211/cfg.c:3119` for this `copy_mesh_setup` usage. That should give me a clearer picture of the data flow and if this truncation poses a security risk.

{
  "File": "net/mac80211/cfg.c",
  "FirstLine": 3119,
  "LineCount": 30
}

{
  "Contents": "3119:\tstatic int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,\n3120:\t\t\tconst struct mesh_setup *setup)\n3121:\t{\n3122:\t\tu8 *new_ie;\n3123:\t\tstruct ieee80211_sub_if_data *sdata = container_of(ifmsh,\n3124:\t\t\t\t\t\tstruct ieee80211_sub_if_data, u.mesh);\n3125:\t\tint i;\n3126:\t\n3127:\t\t/* allocate information elements */\n3128:\t\tnew_ie = NULL;\n3129:\t\n3130:\t\tif (setup-\u003eie_len) {\n3131:\t\t\tnew_ie = kmemdup(setup-\u003eie, setup-\u003eie_len,\n3132:\t\t\t\t\tGFP_KERNEL);\n3133:\t\t\tif (!new_ie)\n3134:\t\t\t\treturn -ENOMEM;\n3135:\t\t}\n3136:\t\tifmsh-\u003eie_len = setup-\u003eie_len;\n3137:\t\tifmsh-\u003eie = new_ie;\n3138:\t\n3139:\t\t/* now copy the rest of the setup parameters */\n3140:\t\tifmsh-\u003emesh_id_len = setup-\u003emesh_id_len;\n3141:\t\tmemcpy(ifmsh-\u003emesh_id, setup-\u003emesh_id, ifmsh-\u003emesh_id_len);\n3142:\t\tifmsh-\u003emesh_sp_id = setup-\u003esync_method;\n3143:\t\tifmsh-\u003emesh_pp_id = setup-\u003epath_sel_proto;\n3144:\t\tifmsh-\u003emesh_pm_id = setup-\u003epath_metric;\n3145:\t\tifmsh-\u003euser_mpm = setup-\u003euser_mpm;\n3146:\t\tifmsh-\u003emesh_auth_id = setup-\u003eauth_id;\n3147:\t\tifmsh-\u003esecurity = IEEE80211_MESH_SEC_NONE;\n3148:\t\tifmsh-\u003euserspace_handles_dfs = setup-\u003euserspace_handles_dfs;\n"
}

gemini-3.1-pro-preview

null

null

							input: 34775
							output: 29
							thoughts: 523
						

**Analyzing a Potential Integer Overflow Bug Fix in Mesh Setup**

Okay, here's what's running through my head. I see this line: `ifmsh->ie_len = setup->ie_len;` and immediately, my spidey-sense tingles. `setup->ie_len` is now a `size_t` but `ifmsh->ie_len` is still a `u8`. This raises a red flag. If `setup->ie_len` is, say, 256 (which it very well could be), then `ifmsh->ie_len` becomes 0 due to truncation. This *feels* like a bug fix, potentially addressing an integer overflow scenario.

I need to confirm the patch itself. Ah, here's the diff: they've changed `ie_len` in `struct mesh_setup` from `u8` to `size_t`. That makes sense in principle to prevent truncation, which is good. The crux of the issue is how `ie_len` is used.

I recall `nl80211_parse_mesh_setup` and how it handles the setup information. The code grabs the IE length using `nla_len(ieattr)`. I believe this function returns an `int` – I'm pretty sure of that. If `ie_len` was a `u8` previously, there *would* have been truncation. Say `nla_len` returns 256. It would be truncated to 0 when assigned to the u8. Now that `setup->ie_len` is a `size_t`, it's not truncated, which makes sense to me.

But wait a minute! The bigger issue is *downstream*. If `setup->ie_len` is passed to the `ifmsh` struct – as the first line showed, `ifmsh->ie_len` is *still* `u8`! So, even with the change, we're back to square one. Whatever non-zero value `setup->ie_len` gets, when it's assigned to `ifmsh->ie_len`, it will still get truncated. I've missed something.

I need to understand what this `ie_len` is used for in the `ifmsh` context. Where is this copied value subsequently used? I'll need to check the entire driver for other instances of mesh setup handling and how `ifmsh->ie_len` is utilized. I'll search the `drivers/net/wireless/` directory for `mesh_setup` to see where else that structure and the `ie_len` member are involved, to determine the full scope of this change and whether this is a genuine fix or if it introduces a new problem.

no matches

{
  "Expression": "mesh_setup",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 35939
							output: 29
							thoughts: 67
						

Here's my thought process, as if I were analyzing this code:

**Checking the Scope of `setup->ie_len`**

Okay, hold on a second. I need to be sure I understand where `setup->ie_len` is being used. I initially thought it was confined to a specific area. But now I have to clarify my assumption... Is `setup->ie_len` used in `net/wireless/nl80211.c` as well? I remember seeing it during my review of `nl80211_parse_mesh_setup`, but I should verify the scope of the variable's usage.
Is it utilized in `net/wireless/mesh.c`, I need to double check that too, now.

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\n--\nnet/wireless/nl80211.c-10421-\t\tsetup-\u003eie = nla_data(ieattr);\nnet/wireless/nl80211.c:10422:\t\tsetup-\u003eie_len = nla_len(ieattr);\nnet/wireless/nl80211.c-10423-\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 36345
							output: 29
							thoughts: 51
						

Okay, let me think this through.

**Analyzing the `setup->ie_len` Usage**

Right, so I'm trying to figure out where this `setup->ie_len` value is actually *used* in this `net/mac80211` code. Initially, it looked like the only place it came into play was within `copy_mesh_setup` in `cfg.c`. That felt a little... simplistic. I mean, it's good to narrow it down, but I need to be *sure* I haven't missed anything, especially in something that seems like a fundamental setup parameter.

Let me take another look... Oh, hold on. Wait a second. What about `rdev_join_mesh`? Is *that* a potential spot where `setup->ie_len` is referenced or utilized, even indirectly? I need to check the code in there more closely. I might have jumped the gun with my initial assessment. I need to ensure I've covered all the possible paths this value might influence the mesh network setup process. I need to be thorough; overlooking that could lead to unforeseen issues.

no matches

{
  "Expression": "join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 36681
							output: 30
							thoughts: 22
						

Here's my thought process, as requested:

**Mesh Networking Function Call Location**

Okay, let's see. I'm digging into this code, specifically looking for where `rdev_join_mesh` is utilized. Hmm, where was that function defined again? Ah, right. I remember seeing a reference to it, buried in the `net/wireless` subdirectory. I'll take a look. Yep, there it is! `rdev_join_mesh` is defined and called within `net/wireless/mesh.c`. That gives me a definite starting point for analyzing its behavior within the mesh networking context. Okay, this narrows down the scope of the investigation.

{
  "Expression": "rdev_join_mesh",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/mesh.c=102=int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/mesh.c-213-\nnet/wireless/mesh.c:214:\terr = rdev_join_mesh(rdev, dev, conf, setup);\nnet/wireless/mesh.c-215-\tif (!err) {\n--\nnet/wireless/rdev-ops.h=343=rdev_update_mesh_config(struct cfg80211_registered_device *rdev,\n--\nnet/wireless/rdev-ops.h-353-\nnet/wireless/rdev-ops.h:354:static inline int rdev_join_mesh(struct cfg80211_registered_device *rdev,\nnet/wireless/rdev-ops.h-355-\t\t\t\t struct net_device *dev,\n--\nnet/wireless/rdev-ops.h-359-\tint ret;\nnet/wireless/rdev-ops.h:360:\ttrace_rdev_join_mesh(\u0026rdev-\u003ewiphy, dev, conf, setup);\nnet/wireless/rdev-ops.h-361-\tret = rdev-\u003eops-\u003ejoin_mesh(\u0026rdev-\u003ewiphy, dev, conf, setup);\n--\nnet/wireless/trace.h=1248=TRACE_EVENT(rdev_update_mesh_config,\n--\nnet/wireless/trace.h-1267-\nnet/wireless/trace.h:1268:TRACE_EVENT(rdev_join_mesh,\nnet/wireless/trace.h-1269-\tTP_PROTO(struct wiphy *wiphy, struct net_device *netdev,\n"
}

gemini-3.1-pro-preview

null

null

							input: 37325
							output: 30
							thoughts: 18
						

Okay, let's dive into this. Here's how I'd approach that particular line of thinking, presented as if it were *my* internal monologue as a networking expert:

**Investigating `join_mesh` in `drivers/net/wireless`**

Right, let's see... the code's pointing me toward `join_mesh`. Given the context, it's pretty clear this is going to be the function or module responsible for handling the connection of a device, most likely a wireless one, to a mesh network. And the path `drivers/net/wireless` confirms it's a kernel-level driver or related component.

My initial assumption is that this `join_mesh` function would be the core of the mesh network association process. It’s the entry point to handle the negotiation, authentication, and ultimately, the integration of a new node into the existing mesh infrastructure. I'd expect to find things like:

*   **Beacon Scanning/Discovery:** Code to actively scan for available mesh networks and their characteristics, possibly using specific Mesh-specific protocols like IEEE 802.11s or others implemented within the network stack.
*   **Authentication/Security:** There's bound to be code to handle the authentication exchange between the new node and the mesh root, or an intermediary node, often involving security protocols like WPA3-SAE, or other relevant security frameworks applicable to the mesh environment.
*   **Key Exchange:** Implementation for securely exchanging cryptographic keys to establish a secure link.
*   **Mesh Formation Protocols:** This function is where the node should communicate with existing mesh nodes to learn of and interact with the mesh network topology (e.g. AODV, OLSR or other relevant mesh routing protocols).
*   **Configuration:** The setup of the node with mesh network-specific parameters.
*   **Integration with the Network Stack:** Once a secure connection is formed, there'll be code to integrate the new node into the Linux network stack, probably establishing a new virtual interface or bridge configuration to direct traffic appropriately.

So my immediate goal would be to understand the high-level architecture of `join_mesh`. I'd want to quickly identify the key data structures it uses, the major functions it calls, and how it orchestrates this mesh connection procedure. The deeper dive is to determine if any subtle networking misconfigurations are present.

no matches

{
  "Expression": "\\.join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 37886
							output: 33
							thoughts: 46
						

**Investigating the Implementation of `join_mesh`**

Okay, so I need to track down how `join_mesh` is actually handled in the kernel. My immediate thought is that this is likely implemented within the mac80211 framework, given its role in 802.11 wireless networking. So, the logical place to start digging is the mac80211 source code. Specifically, I should be looking at `net/mac80211/main.c`, or anywhere else the `join_mesh` function might be registered within that directory structure. I need to understand the function definition, how it's called, and what its overall functionality entails to get a complete grasp of it. Let's see what we can find!

{
  "Expression": "\\.join_mesh",
  "PathPrefix": "net/mac80211/"
}

{
  "Output": "net/mac80211/cfg.c=5991=const struct cfg80211_ops mac80211_config_ops = {\n--\nnet/mac80211/cfg.c-6021-\t.get_mesh_config = ieee80211_get_mesh_config,\nnet/mac80211/cfg.c:6022:\t.join_mesh = ieee80211_join_mesh,\nnet/mac80211/cfg.c-6023-\t.leave_mesh = ieee80211_leave_mesh,\n"
}

gemini-3.1-pro-preview

null

null

							input: 38298
							output: 40
							thoughts: 32
						

Okay, here's my summary, presented as a stream of thought:

**Diving into the Mesh Join Function**

Alright, time to dig in. I need to understand this mesh joining process in more detail. Let's start with `ieee80211_join_mesh`. Where would that be, now? Ah, yes, it's a core function, so it's likely to be in the `net/mac80211/cfg.c` file. Makes sense – configuration and joining procedures often go hand-in-hand. This should be a good starting point for unraveling how mesh network associations are handled at this level of the stack. I want to see how the driver interacts with mac80211 for mesh join operations. Let's see what we can find.

{
  "Expression": "ieee80211_join_mesh",
  "PathPrefix": "net/mac80211/"
}

{
  "Output": "net/mac80211/cfg.c=3176=static int ieee80211_update_mesh_config(struct wiphy *wiphy,\n--\nnet/mac80211/cfg.c-3295-\nnet/mac80211/cfg.c:3296:static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,\nnet/mac80211/cfg.c-3297-\t\t\t       const struct mesh_config *conf,\n--\nnet/mac80211/cfg.c=5991=const struct cfg80211_ops mac80211_config_ops = {\n--\nnet/mac80211/cfg.c-6021-\t.get_mesh_config = ieee80211_get_mesh_config,\nnet/mac80211/cfg.c:6022:\t.join_mesh = ieee80211_join_mesh,\nnet/mac80211/cfg.c-6023-\t.leave_mesh = ieee80211_leave_mesh,\n"
}

gemini-3.1-pro-preview

null

null

							input: 38855
							output: 41
							thoughts: 32
						

Okay, here's my interpretation of that thought process, assuming I'm already deep in the weeds of wireless networking code and quite familiar with the mac80211 framework:

**Diving into the Mesh Network Join Function**

Alright, time to get my hands dirty. Let's dig into the `ieee80211_join_mesh` function. I remember seeing that one in the `net/mac80211/cfg.c` file – that's where a lot of the interface configuration and management stuff lives, so it makes sense that joining a mesh network would be handled there. I'm expecting to find the core logic for the mesh association process – the negotiation of parameters, setting up the necessary security contexts (hopefully WPA3 Mesh is supported), and generally orchestrating the exchange of management frames that get a station plugged into the network. I wonder if there are any subtle race conditions lurking in there, or maybe optimizations I could suggest based on my experience with the 802.11 stack. Let's see what they've got.

{
  "File": "net/mac80211/cfg.c",
  "FirstLine": 3296,
  "LineCount": 50
}

{
  "Contents": "3296:\tstatic int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,\n3297:\t\t\t\t       const struct mesh_config *conf,\n3298:\t\t\t\t       const struct mesh_setup *setup)\n3299:\t{\n3300:\t\tstruct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);\n3301:\t\tstruct ieee80211_chan_req chanreq = { .oper = setup-\u003echandef };\n3302:\t\tstruct ieee80211_if_mesh *ifmsh = \u0026sdata-\u003eu.mesh;\n3303:\t\tint err;\n3304:\t\n3305:\t\tlockdep_assert_wiphy(sdata-\u003elocal-\u003ehw.wiphy);\n3306:\t\n3307:\t\tmemcpy(\u0026ifmsh-\u003emshcfg, conf, sizeof(struct mesh_config));\n3308:\t\terr = copy_mesh_setup(ifmsh, setup);\n3309:\t\tif (err)\n3310:\t\t\treturn err;\n3311:\t\n3312:\t\tsdata-\u003econtrol_port_over_nl80211 = setup-\u003econtrol_port_over_nl80211;\n3313:\t\n3314:\t\t/* can mesh use other SMPS modes? */\n3315:\t\tsdata-\u003edeflink.smps_mode = IEEE80211_SMPS_OFF;\n3316:\t\tsdata-\u003edeflink.needed_rx_chains = sdata-\u003elocal-\u003erx_chains;\n3317:\t\n3318:\t\terr = ieee80211_link_use_channel(\u0026sdata-\u003edeflink, \u0026chanreq,\n3319:\t\t\t\t\t\t IEEE80211_CHANCTX_SHARED);\n3320:\t\tif (err)\n3321:\t\t\treturn err;\n3322:\t\n3323:\t\treturn ieee80211_start_mesh(sdata);\n3324:\t}\n3325:\t\n3326:\tstatic int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)\n3327:\t{\n3328:\t\tstruct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);\n3329:\t\n3330:\t\tlockdep_assert_wiphy(sdata-\u003elocal-\u003ehw.wiphy);\n3331:\t\n3332:\t\tieee80211_stop_mesh(sdata);\n3333:\t\tieee80211_link_release_channel(\u0026sdata-\u003edeflink);\n3334:\t\tkfree(sdata-\u003eu.mesh.ie);\n3335:\t\n3336:\t\treturn 0;\n3337:\t}\n3338:\t#endif\n3339:\t\n3340:\tstatic int ieee80211_change_bss(struct wiphy *wiphy,\n3341:\t\t\t\t\tstruct net_device *dev,\n3342:\t\t\t\t\tstruct bss_parameters *params)\n3343:\t{\n3344:\t\tstruct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);\n3345:\t\tstruct ieee80211_link_data *link;\n"
}

gemini-3.1-pro-preview

null

null

							input: 40083
							output: 41
							thoughts: 25
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Re-Examining the Copy Mesh Setup**

Right, `copy_mesh_setup` has been called. The architecture here relies on this function, so it's worth a second look to make sure it's operating as expected. I need to quickly refresh my memory of its internals and its potential impact on the current state. Let's run through `copy_mesh_setup` once more in my head, focusing on any potential edge cases or assumptions that might be relevant to the issue I'm currently debugging. There's probably a detail I glossed over the first time that's key to uncovering the problem. Okay, let's drill down and see if anything jumps out.

{
  "File": "net/mac80211/cfg.c",
  "FirstLine": 3119,
  "LineCount": 30
}

{
  "Contents": "3119:\tstatic int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,\n3120:\t\t\tconst struct mesh_setup *setup)\n3121:\t{\n3122:\t\tu8 *new_ie;\n3123:\t\tstruct ieee80211_sub_if_data *sdata = container_of(ifmsh,\n3124:\t\t\t\t\t\tstruct ieee80211_sub_if_data, u.mesh);\n3125:\t\tint i;\n3126:\t\n3127:\t\t/* allocate information elements */\n3128:\t\tnew_ie = NULL;\n3129:\t\n3130:\t\tif (setup-\u003eie_len) {\n3131:\t\t\tnew_ie = kmemdup(setup-\u003eie, setup-\u003eie_len,\n3132:\t\t\t\t\tGFP_KERNEL);\n3133:\t\t\tif (!new_ie)\n3134:\t\t\t\treturn -ENOMEM;\n3135:\t\t}\n3136:\t\tifmsh-\u003eie_len = setup-\u003eie_len;\n3137:\t\tifmsh-\u003eie = new_ie;\n3138:\t\n3139:\t\t/* now copy the rest of the setup parameters */\n3140:\t\tifmsh-\u003emesh_id_len = setup-\u003emesh_id_len;\n3141:\t\tmemcpy(ifmsh-\u003emesh_id, setup-\u003emesh_id, ifmsh-\u003emesh_id_len);\n3142:\t\tifmsh-\u003emesh_sp_id = setup-\u003esync_method;\n3143:\t\tifmsh-\u003emesh_pp_id = setup-\u003epath_sel_proto;\n3144:\t\tifmsh-\u003emesh_pm_id = setup-\u003epath_metric;\n3145:\t\tifmsh-\u003euser_mpm = setup-\u003euser_mpm;\n3146:\t\tifmsh-\u003emesh_auth_id = setup-\u003eauth_id;\n3147:\t\tifmsh-\u003esecurity = IEEE80211_MESH_SEC_NONE;\n3148:\t\tifmsh-\u003euserspace_handles_dfs = setup-\u003euserspace_handles_dfs;\n"
}

gemini-3.1-pro-preview

null

null

							input: 40884
							output: 29
							thoughts: 291
						

**Analyzing Potential Integer Overflow in Mesh IE Handling**

Okay, so I'm looking at this `net/mac80211/ieee80211_i.h` file, and I've noticed something. The `ifmsh->ie_len` field is defined as a `u8`, right? That means it's an 8-bit unsigned integer. Now, the assignment `ifmsh->ie_len = setup->ie_len;` is happening. My initial thought is that this is fine, but there's a problem here.

If `setup->ie_len` is greater than 255, we're going to get some truncation. If, let's say, `setup->ie_len` is 256, then `ifmsh->ie_len` becomes 0. That looks bad. But then I have to think, *wait a minute*, the `ifmsh->ie` *points* to a 256-byte buffer in this scenario. It's allocated that size. If `ifmsh->ie_len` is 0, the buffer *shouldn't* be accessed, because we're using the length field. So, maybe it's fine?

Let's think further. If `setup->ie_len` is 257, then `ifmsh->ie_len` becomes 1. So, we're using a 257-byte buffer, but the length indicates only one byte is used. Hmmm... is there any potential out-of-bounds read/write? No, wait! Because `ifmsh->ie_len` is smaller than the allocated buffer size, we will be fine!

Okay, but what else uses `setup->ie_len`? I'm going to dig into the `cfg80211` code now to see what's happening. I need to check `net/wireless/mesh.c` to see how the code is *using* this value, what could be calling it. I need to trace this more to see where the problem is.

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/wireless/"
}

{
  "Output": "net/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\n--\nnet/wireless/nl80211.c-10421-\t\tsetup-\u003eie = nla_data(ieattr);\nnet/wireless/nl80211.c:10422:\t\tsetup-\u003eie_len = nla_len(ieattr);\nnet/wireless/nl80211.c-10423-\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 41813
							output: 32
							thoughts: 61
						

Okay, let me think this through.

**Analyzing the Variable's Usage**

Alright, I'm digging into this `setup->ie_len` variable... my initial understanding was that it's exclusively employed within the `nl80211_parse_mesh_setup` and `copy_mesh_setup` functions. I need to be absolutely sure about that. The codebase is vast, and I can't rely on my memory alone. I need to double-check, but something is niggling at the back of my mind. Is it *really* only those two places? The structure in question is a part of the mesh functionality. Hmm... there's a strong possibility that `setup->ie_len` is used within the `trace_rdev_join_mesh` function as well. I need to make sure I'm accounting for all usage cases. Gotta be thorough.

no matches

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/wireless/trace.h"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 42110
							output: 36
							thoughts: 24
						

Here's my take on those thoughts, tailored for an expert audience:

**Diving into the Network Trace**

Okay, so I need to get a handle on what's happening with device joins in the mesh. Let's start with the tracepoints, specifically `trace_rdev_join_mesh`. Given the context, I'm assuming this is in the `net/wireless/` directory, which makes sense. I'll need to open `trace.h` to see exactly what's being logged with that specific point. Hopefully, the tracepoint will give me key variables like the radio device, the mesh interface, and maybe some associated identifiers or status flags. I'm hoping it's providing more than just a bare declaration of the event, and I can extract something meaningful for the analysis of the current problem.

{
  "File": "net/wireless/trace.h",
  "FirstLine": 1268,
  "LineCount": 30
}

{
  "Contents": "1268:\tTRACE_EVENT(rdev_join_mesh,\n1269:\t\tTP_PROTO(struct wiphy *wiphy, struct net_device *netdev,\n1270:\t\t\t const struct mesh_config *conf,\n1271:\t\t\t const struct mesh_setup *setup),\n1272:\t\tTP_ARGS(wiphy, netdev, conf, setup),\n1273:\t\tTP_STRUCT__entry(\n1274:\t\t\tWIPHY_ENTRY\n1275:\t\t\tNETDEV_ENTRY\n1276:\t\t\tMESH_CFG_ENTRY\n1277:\t\t),\n1278:\t\tTP_fast_assign(\n1279:\t\t\tWIPHY_ASSIGN;\n1280:\t\t\tNETDEV_ASSIGN;\n1281:\t\t\tMESH_CFG_ASSIGN;\n1282:\t\t),\n1283:\t\tTP_printk(WIPHY_PR_FMT \", \" NETDEV_PR_FMT,\n1284:\t\t\t  WIPHY_PR_ARG, NETDEV_PR_ARG)\n1285:\t);\n1286:\t\n1287:\tTRACE_EVENT(rdev_change_bss,\n1288:\t\tTP_PROTO(struct wiphy *wiphy, struct net_device *netdev,\n1289:\t\t\t struct bss_parameters *params),\n1290:\t\tTP_ARGS(wiphy, netdev, params),\n1291:\t\tTP_STRUCT__entry(\n1292:\t\t\tWIPHY_ENTRY\n1293:\t\t\tNETDEV_ENTRY\n1294:\t\t\t__field(int, use_cts_prot)\n1295:\t\t\t__field(int, use_short_preamble)\n1296:\t\t\t__field(int, use_short_slot_time)\n1297:\t\t\t__field(int, ap_isolate)\n"
}

gemini-3.1-pro-preview

null

null

							input: 42824
							output: 29
							thoughts: 39
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Debugging a Potential Data Loss Vulnerability**

Alright, so the initial concern is that we're missing a log entry for `setup->ie_len`. That's a classic debugging oversight; we need that visibility, especially when dealing with length fields. It's often the root of subtle bugs and security vulnerabilities.

But wait a minute, the absence of a log entry doesn't necessarily mean it's *unused*. There's a decent chance `setup->ie_len` is being leveraged somewhere down the line in one of the device drivers. I need to revisit the relevant drivers. A quick grep might be enough, but I want to be certain, so let's check again to make sure. I'll need to meticulously audit the code where this field is accessed and utilized, considering all potential contexts.

{
  "Expression": "ie_len",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "Output": "\nFull output is too long, showing 500 out of 3313 lines.\nUse more precise expression if possible.\n\ndrivers/net/wireless/ath/ath10k/core.c=1338=static int ath10k_core_parse_bd_ie_board(struct ath10k *ar,\n--\ndrivers/net/wireless/ath/ath10k/core.c-1345-\tint ret, board_ie_id;\ndrivers/net/wireless/ath/ath10k/core.c:1346:\tsize_t board_ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1347-\tconst void *board_ie_data;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1354-\t\tboard_ie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath10k/core.c:1355:\t\tboard_ie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath10k/core.c-1356-\t\tboard_ie_data = hdr-\u003edata;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1360-\ndrivers/net/wireless/ath/ath10k/core.c:1361:\t\tif (buf_len \u003c ALIGN(board_ie_len, 4)) {\ndrivers/net/wireless/ath/ath10k/core.c-1362-\t\t\tath10k_err(ar, \"invalid ATH10K_BD_IE_BOARD length: %zu \u003c %zu\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:1363:\t\t\t\t   buf_len, ALIGN(board_ie_len, 4));\ndrivers/net/wireless/ath/ath10k/core.c-1364-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1370-\t\t\tath10k_dbg_dump(ar, ATH10K_DBG_BOOT, \"board name\", \"\",\ndrivers/net/wireless/ath/ath10k/core.c:1371:\t\t\t\t\tboard_ie_data, board_ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-1372-\ndrivers/net/wireless/ath/ath10k/core.c:1373:\t\t\tif (board_ie_len != strlen(boardname))\ndrivers/net/wireless/ath/ath10k/core.c-1374-\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1395-\t\t\t\tar-\u003enormal_mode_fw.board_data = board_ie_data;\ndrivers/net/wireless/ath/ath10k/core.c:1396:\t\t\t\tar-\u003enormal_mode_fw.board_len = board_ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1397-\t\t\t} else if (bd_ie_type == ATH10K_BD_IE_BOARD_EXT) {\n--\ndrivers/net/wireless/ath/ath10k/core.c-1402-\t\t\t\tar-\u003enormal_mode_fw.ext_board_data = board_ie_data;\ndrivers/net/wireless/ath/ath10k/core.c:1403:\t\t\t\tar-\u003enormal_mode_fw.ext_board_len = board_ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1404-\t\t\t}\n--\ndrivers/net/wireless/ath/ath10k/core.c-1414-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath10k/core.c:1415:\t\tboard_ie_len = ALIGN(board_ie_len, 4);\ndrivers/net/wireless/ath/ath10k/core.c-1416-\ndrivers/net/wireless/ath/ath10k/core.c:1417:\t\tbuf_len -= board_ie_len;\ndrivers/net/wireless/ath/ath10k/core.c:1418:\t\tbuf += board_ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1419-\t}\n--\ndrivers/net/wireless/ath/ath10k/core.c=1428=static int ath10k_core_search_bd(struct ath10k *ar,\n--\ndrivers/net/wireless/ath/ath10k/core.c-1432-{\ndrivers/net/wireless/ath/ath10k/core.c:1433:\tsize_t ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1434-\tstruct ath10k_fw_ie *hdr;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1439-\t\tie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath10k/core.c:1440:\t\tie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath10k/core.c-1441-\n--\ndrivers/net/wireless/ath/ath10k/core.c-1444-\ndrivers/net/wireless/ath/ath10k/core.c:1445:\t\tif (len \u003c ALIGN(ie_len, 4)) {\ndrivers/net/wireless/ath/ath10k/core.c:1446:\t\t\tath10k_err(ar, \"invalid length for board ie_id %d ie_len %zu len %zu\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:1447:\t\t\t\t   ie_id, ie_len, len);\ndrivers/net/wireless/ath/ath10k/core.c-1448-\t\t\treturn -EINVAL;\n--\ndrivers/net/wireless/ath/ath10k/core.c-1452-\t\tcase ATH10K_BD_IE_BOARD:\ndrivers/net/wireless/ath/ath10k/core.c:1453:\t\t\tret = ath10k_core_parse_bd_ie_board(ar, data, ie_len,\ndrivers/net/wireless/ath/ath10k/core.c-1454-\t\t\t\t\t\t\t    boardname,\n--\ndrivers/net/wireless/ath/ath10k/core.c-1462-\t\tcase ATH10K_BD_IE_BOARD_EXT:\ndrivers/net/wireless/ath/ath10k/core.c:1463:\t\t\tret = ath10k_core_parse_bd_ie_board(ar, data, ie_len,\ndrivers/net/wireless/ath/ath10k/core.c-1464-\t\t\t\t\t\t\t    boardname,\n--\ndrivers/net/wireless/ath/ath10k/core.c-1474-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath10k/core.c:1475:\t\tie_len = ALIGN(ie_len, 4);\ndrivers/net/wireless/ath/ath10k/core.c-1476-\ndrivers/net/wireless/ath/ath10k/core.c:1477:\t\tlen -= ie_len;\ndrivers/net/wireless/ath/ath10k/core.c:1478:\t\tdata += ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-1479-\t}\n--\ndrivers/net/wireless/ath/ath10k/core.c=2009=int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,\n--\ndrivers/net/wireless/ath/ath10k/core.c-2011-{\ndrivers/net/wireless/ath/ath10k/core.c:2012:\tsize_t magic_len, len, ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-2013-\tint ie_id, i, index, bit, ret;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2053-\t\tie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath10k/core.c:2054:\t\tie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath10k/core.c-2055-\n--\ndrivers/net/wireless/ath/ath10k/core.c-2058-\ndrivers/net/wireless/ath/ath10k/core.c:2059:\t\tif (len \u003c ie_len) {\ndrivers/net/wireless/ath/ath10k/core.c-2060-\t\t\tath10k_err(ar, \"invalid length for FW IE %d (%zu \u003c %zu)\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:2061:\t\t\t\t   ie_id, len, ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-2062-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2067-\t\tcase ATH10K_FW_IE_FW_VERSION:\ndrivers/net/wireless/ath/ath10k/core.c:2068:\t\t\tif (ie_len \u003e sizeof(fw_file-\u003efw_version) - 1)\ndrivers/net/wireless/ath/ath10k/core.c-2069-\t\t\t\tbreak;\ndrivers/net/wireless/ath/ath10k/core.c-2070-\ndrivers/net/wireless/ath/ath10k/core.c:2071:\t\t\tmemcpy(fw_file-\u003efw_version, data, ie_len);\ndrivers/net/wireless/ath/ath10k/core.c:2072:\t\t\tfw_file-\u003efw_version[ie_len] = '\\0';\ndrivers/net/wireless/ath/ath10k/core.c-2073-\n--\ndrivers/net/wireless/ath/ath10k/core.c-2078-\t\tcase ATH10K_FW_IE_TIMESTAMP:\ndrivers/net/wireless/ath/ath10k/core.c:2079:\t\t\tif (ie_len != sizeof(u32))\ndrivers/net/wireless/ath/ath10k/core.c-2080-\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2089-\t\t\t\t   \"found firmware features ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:2090:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-2091-\n--\ndrivers/net/wireless/ath/ath10k/core.c-2095-\ndrivers/net/wireless/ath/ath10k/core.c:2096:\t\t\t\tif (index == ie_len)\ndrivers/net/wireless/ath/ath10k/core.c-2097-\t\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2113-\t\t\t\t   \"found fw image ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:2114:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-2115-\ndrivers/net/wireless/ath/ath10k/core.c-2116-\t\t\tfw_file-\u003efirmware_data = data;\ndrivers/net/wireless/ath/ath10k/core.c:2117:\t\t\tfw_file-\u003efirmware_len = ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-2118-\n--\ndrivers/net/wireless/ath/ath10k/core.c-2122-\t\t\t\t   \"found otp image ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:2123:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-2124-\ndrivers/net/wireless/ath/ath10k/core.c-2125-\t\t\tfw_file-\u003eotp_data = data;\ndrivers/net/wireless/ath/ath10k/core.c:2126:\t\t\tfw_file-\u003eotp_len = ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-2127-\n--\ndrivers/net/wireless/ath/ath10k/core.c-2129-\t\tcase ATH10K_FW_IE_WMI_OP_VERSION:\ndrivers/net/wireless/ath/ath10k/core.c:2130:\t\t\tif (ie_len != sizeof(u32))\ndrivers/net/wireless/ath/ath10k/core.c-2131-\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2140-\t\tcase ATH10K_FW_IE_HTT_OP_VERSION:\ndrivers/net/wireless/ath/ath10k/core.c:2141:\t\t\tif (ie_len != sizeof(u32))\ndrivers/net/wireless/ath/ath10k/core.c-2142-\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2153-\t\t\t\t   \"found fw code swap image ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath10k/core.c:2154:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath10k/core.c-2155-\t\t\tfw_file-\u003ecodeswap_data = data;\ndrivers/net/wireless/ath/ath10k/core.c:2156:\t\t\tfw_file-\u003ecodeswap_len = ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-2157-\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath10k/core.c-2164-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath10k/core.c:2165:\t\tie_len = ALIGN(ie_len, 4);\ndrivers/net/wireless/ath/ath10k/core.c-2166-\ndrivers/net/wireless/ath/ath10k/core.c:2167:\t\tlen -= ie_len;\ndrivers/net/wireless/ath/ath10k/core.c:2168:\t\tdata += ie_len;\ndrivers/net/wireless/ath/ath10k/core.c-2169-\t}\n--\ndrivers/net/wireless/ath/ath10k/mac.c=6394=static int ath10k_hw_scan(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/ath/ath10k/mac.c-6443-\ndrivers/net/wireless/ath/ath10k/mac.c:6444:\tif (req-\u003eie_len) {\ndrivers/net/wireless/ath/ath10k/mac.c:6445:\t\targ-\u003eie_len = req-\u003eie_len;\ndrivers/net/wireless/ath/ath10k/mac.c:6446:\t\tmemcpy(arg-\u003eie, req-\u003eie, arg-\u003eie_len);\ndrivers/net/wireless/ath/ath10k/mac.c-6447-\t}\n--\ndrivers/net/wireless/ath/ath10k/mac.c=9971=int ath10k_mac_register(struct ath10k *ar)\n--\ndrivers/net/wireless/ath/ath10k/mac.c-10105-\tar-\u003ehw-\u003ewiphy-\u003emax_scan_ssids = WLAN_SCAN_PARAMS_MAX_SSID;\ndrivers/net/wireless/ath/ath10k/mac.c:10106:\tar-\u003ehw-\u003ewiphy-\u003emax_scan_ie_len = WLAN_SCAN_PARAMS_MAX_IE_LEN;\ndrivers/net/wireless/ath/ath10k/mac.c-10107-\n--\ndrivers/net/wireless/ath/ath10k/mac.c-10110-\t\tar-\u003ehw-\u003ewiphy-\u003emax_match_sets = WMI_PNO_MAX_SUPP_NETWORKS;\ndrivers/net/wireless/ath/ath10k/mac.c:10111:\t\tar-\u003ehw-\u003ewiphy-\u003emax_sched_scan_ie_len = WMI_PNO_MAX_IE_LENGTH;\ndrivers/net/wireless/ath/ath10k/mac.c-10112-\t\tar-\u003ehw-\u003ewiphy-\u003emax_sched_scan_plans = WMI_PNO_MAX_SCHED_SCAN_PLANS;\n--\ndrivers/net/wireless/ath/ath10k/p2p.c=11=static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,\n--\ndrivers/net/wireless/ath/ath10k/p2p.c-53-\ndrivers/net/wireless/ath/ath10k/p2p.c:54:static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)\ndrivers/net/wireless/ath/ath10k/p2p.c-55-{\n--\ndrivers/net/wireless/ath/ath10k/p2p.c=83=static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,\n--\ndrivers/net/wireless/ath/ath10k/p2p.c-93-\ndrivers/net/wireless/ath/ath10k/p2p.c:94:\tlen = ath10k_p2p_noa_ie_len_compute(noa);\ndrivers/net/wireless/ath/ath10k/p2p.c-95-\tif (!len)\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c=1977=ath10k_wmi_tlv_op_gen_start_scan(struct ath10k *ar,\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-1982-\tstruct sk_buff *skb;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:1983:\tsize_t len, chan_len, ssid_len, bssid_len, ie_len;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-1984-\t__le32 *chans;\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-1996-\tbssid_len = arg-\u003en_bssids * sizeof(struct wmi_mac_addr);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:1997:\tie_len = roundup(arg-\u003eie_len, 4);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-1998-\tlen = (sizeof(*tlv) + sizeof(*cmd)) +\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2001-\t      sizeof(*tlv) + bssid_len +\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:2002:\t      sizeof(*tlv) + ie_len;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2003-\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2018-\tcmd-\u003enum_bssids = __cpu_to_le32(arg-\u003en_bssids);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:2019:\tcmd-\u003eie_len = __cpu_to_le32(arg-\u003eie_len);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2020-\tcmd-\u003enum_probes = __cpu_to_le32(3);\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2065-\ttlv-\u003etag = __cpu_to_le16(WMI_TLV_TAG_ARRAY_BYTE);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:2066:\ttlv-\u003elen = __cpu_to_le16(ie_len);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:2067:\tmemcpy(tlv-\u003evalue, arg-\u003eie, arg-\u003eie_len);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2068-\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2069-\tptr += sizeof(*tlv);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:2070:\tptr += ie_len;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-2071-\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c=3432=ath10k_wmi_tlv_op_gen_p2p_go_bcn_ie(struct ath10k *ar, u32 vdev_id,\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-3452-\tcmd-\u003evdev_id = __cpu_to_le32(vdev_id);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c:3453:\tcmd-\u003eie_len = __cpu_to_le32(p2p_ie[1] + 2);\ndrivers/net/wireless/ath/ath10k/wmi-tlv.c-3454-\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h=1850=struct wmi_tlv_start_scan_cmd {\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h-1855-\t__le32 num_ssids;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h:1856:\t__le32 ie_len;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h-1857-\t__le32 num_probes;\n--\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h=2057=struct wmi_tlv_p2p_go_bcn_ie {\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h-2058-\t__le32 vdev_id;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h:2059:\t__le32 ie_len;\ndrivers/net/wireless/ath/ath10k/wmi-tlv.h-2060-} __packed;\n--\ndrivers/net/wireless/ath/ath10k/wmi.c=3574=static void ath10k_wmi_update_tim(struct ath10k *ar,\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-3581-\tu8 *ies, *ie;\ndrivers/net/wireless/ath/ath10k/wmi.c:3582:\tu8 ie_len, pvm_len;\ndrivers/net/wireless/ath/ath10k/wmi.c-3583-\t__le32 t;\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-3632-\ttim = (void *)ie + 2;\ndrivers/net/wireless/ath/ath10k/wmi.c:3633:\tie_len = ie[1];\ndrivers/net/wireless/ath/ath10k/wmi.c:3634:\tpvm_len = ie_len - 3; /* exclude dtim count, dtim period, bmap ctl */\ndrivers/net/wireless/ath/ath10k/wmi.c-3635-\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-3637-\t\tint expand_size = tim_len - pvm_len;\ndrivers/net/wireless/ath/ath10k/wmi.c:3638:\t\tint move_size = skb_tail_pointer(bcn) - (ie + 2 + ie_len);\ndrivers/net/wireless/ath/ath10k/wmi.c:3639:\t\tvoid *next_ie = ie + 2 + ie_len;\ndrivers/net/wireless/ath/ath10k/wmi.c-3640-\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-3644-\t\t\tie[1] += expand_size;\ndrivers/net/wireless/ath/ath10k/wmi.c:3645:\t\t\tie_len += expand_size;\ndrivers/net/wireless/ath/ath10k/wmi.c-3646-\t\t\tpvm_len += expand_size;\n--\ndrivers/net/wireless/ath/ath10k/wmi.c=6885=int ath10k_wmi_start_scan_verify(const struct wmi_start_scan_arg *arg)\ndrivers/net/wireless/ath/ath10k/wmi.c-6886-{\ndrivers/net/wireless/ath/ath10k/wmi.c:6887:\tif (arg-\u003eie_len \u003e WLAN_SCAN_PARAMS_MAX_IE_LEN)\ndrivers/net/wireless/ath/ath10k/wmi.c-6888-\t\treturn -EINVAL;\n--\ndrivers/net/wireless/ath/ath10k/wmi.c=6900=ath10k_wmi_start_scan_tlvs_len(const struct wmi_start_scan_arg *arg)\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-6903-\ndrivers/net/wireless/ath/ath10k/wmi.c:6904:\tif (arg-\u003eie_len) {\ndrivers/net/wireless/ath/ath10k/wmi.c-6905-\t\tlen += sizeof(struct wmi_ie_data);\ndrivers/net/wireless/ath/ath10k/wmi.c:6906:\t\tlen += roundup(arg-\u003eie_len, 4);\ndrivers/net/wireless/ath/ath10k/wmi.c-6907-\t}\n--\ndrivers/net/wireless/ath/ath10k/wmi.c=6957=ath10k_wmi_put_start_scan_tlvs(u8 *tlvs,\n--\ndrivers/net/wireless/ath/ath10k/wmi.c-7009-\ndrivers/net/wireless/ath/ath10k/wmi.c:7010:\tif (arg-\u003eie_len) {\ndrivers/net/wireless/ath/ath10k/wmi.c-7011-\t\tie = ptr;\ndrivers/net/wireless/ath/ath10k/wmi.c-7012-\t\tie-\u003etag = __cpu_to_le32(WMI_IE_TAG);\ndrivers/net/wireless/ath/ath10k/wmi.c:7013:\t\tie-\u003eie_len = __cpu_to_le32(arg-\u003eie_len);\ndrivers/net/wireless/ath/ath10k/wmi.c:7014:\t\tmemcpy(ie-\u003eie_data, arg-\u003eie, arg-\u003eie_len);\ndrivers/net/wireless/ath/ath10k/wmi.c-7015-\ndrivers/net/wireless/ath/ath10k/wmi.c-7016-\t\tptr += sizeof(*ie);\ndrivers/net/wireless/ath/ath10k/wmi.c:7017:\t\tptr += roundup(arg-\u003eie_len, 4);\ndrivers/net/wireless/ath/ath10k/wmi.c-7018-\t}\n--\ndrivers/net/wireless/ath/ath10k/wmi.h=3156=struct wmi_ie_data {\ndrivers/net/wireless/ath/ath10k/wmi.h-3157-\t__le32 tag; /* WMI_IE_TAG */\ndrivers/net/wireless/ath/ath10k/wmi.h:3158:\t__le32 ie_len;\ndrivers/net/wireless/ath/ath10k/wmi.h-3159-\tu8 ie_data[];\n--\ndrivers/net/wireless/ath/ath10k/wmi.h=3280=struct wmi_start_scan_arg {\n--\ndrivers/net/wireless/ath/ath10k/wmi.h-3297-\ndrivers/net/wireless/ath/ath10k/wmi.h:3298:\tu32 ie_len;\ndrivers/net/wireless/ath/ath10k/wmi.h-3299-\tu32 n_channels;\n--\ndrivers/net/wireless/ath/ath11k/core.c=1617=static int ath11k_core_parse_bd_ie_board(struct ath11k_base *ab,\n--\ndrivers/net/wireless/ath/ath11k/core.c-1627-\tint ret, board_ie_id;\ndrivers/net/wireless/ath/ath11k/core.c:1628:\tsize_t board_ie_len;\ndrivers/net/wireless/ath/ath11k/core.c-1629-\tconst void *board_ie_data;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1636-\t\tboard_ie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath11k/core.c:1637:\t\tboard_ie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath11k/core.c-1638-\t\tboard_ie_data = hdr-\u003edata;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1642-\ndrivers/net/wireless/ath/ath11k/core.c:1643:\t\tif (buf_len \u003c ALIGN(board_ie_len, 4)) {\ndrivers/net/wireless/ath/ath11k/core.c-1644-\t\t\tath11k_err(ab, \"invalid %s length: %zu \u003c %zu\\n\",\ndrivers/net/wireless/ath/ath11k/core.c-1645-\t\t\t\t   ath11k_bd_ie_type_str(ie_id),\ndrivers/net/wireless/ath/ath11k/core.c:1646:\t\t\t\t   buf_len, ALIGN(board_ie_len, 4));\ndrivers/net/wireless/ath/ath11k/core.c-1647-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1652-\t\t\tath11k_dbg_dump(ab, ATH11K_DBG_BOOT, \"board name\", \"\",\ndrivers/net/wireless/ath/ath11k/core.c:1653:\t\t\t\t\tboard_ie_data, board_ie_len);\ndrivers/net/wireless/ath/ath11k/core.c-1654-\ndrivers/net/wireless/ath/ath11k/core.c:1655:\t\t\tif (board_ie_len != strlen(boardname))\ndrivers/net/wireless/ath/ath11k/core.c-1656-\t\t\t\tgoto next;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1677-\t\t\tbd-\u003edata = board_ie_data;\ndrivers/net/wireless/ath/ath11k/core.c:1678:\t\t\tbd-\u003elen = board_ie_len;\ndrivers/net/wireless/ath/ath11k/core.c-1679-\n--\ndrivers/net/wireless/ath/ath11k/core.c-1688-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath11k/core.c:1689:\t\tboard_ie_len = ALIGN(board_ie_len, 4);\ndrivers/net/wireless/ath/ath11k/core.c-1690-\ndrivers/net/wireless/ath/ath11k/core.c:1691:\t\tbuf_len -= board_ie_len;\ndrivers/net/wireless/ath/ath11k/core.c:1692:\t\tbuf += board_ie_len;\ndrivers/net/wireless/ath/ath11k/core.c-1693-\t}\n--\ndrivers/net/wireless/ath/ath11k/core.c=1702=static int ath11k_core_fetch_board_data_api_n(struct ath11k_base *ab,\n--\ndrivers/net/wireless/ath/ath11k/core.c-1711-\tchar *filename, filepath[100];\ndrivers/net/wireless/ath/ath11k/core.c:1712:\tsize_t ie_len;\ndrivers/net/wireless/ath/ath11k/core.c-1713-\tstruct ath11k_fw_ie *hdr;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1759-\t\tie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath11k/core.c:1760:\t\tie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath11k/core.c-1761-\n--\ndrivers/net/wireless/ath/ath11k/core.c-1764-\ndrivers/net/wireless/ath/ath11k/core.c:1765:\t\tif (len \u003c ALIGN(ie_len, 4)) {\ndrivers/net/wireless/ath/ath11k/core.c:1766:\t\t\tath11k_err(ab, \"invalid length for board ie_id %d ie_len %zu len %zu\\n\",\ndrivers/net/wireless/ath/ath11k/core.c:1767:\t\t\t\t   ie_id, ie_len, len);\ndrivers/net/wireless/ath/ath11k/core.c-1768-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath11k/core.c-1773-\t\t\tret = ath11k_core_parse_bd_ie_board(ab, bd, data,\ndrivers/net/wireless/ath/ath11k/core.c:1774:\t\t\t\t\t\t\t    ie_len,\ndrivers/net/wireless/ath/ath11k/core.c-1775-\t\t\t\t\t\t\t    boardname,\n--\ndrivers/net/wireless/ath/ath11k/core.c-1789-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath11k/core.c:1790:\t\tie_len = ALIGN(ie_len, 4);\ndrivers/net/wireless/ath/ath11k/core.c-1791-\ndrivers/net/wireless/ath/ath11k/core.c:1792:\t\tlen -= ie_len;\ndrivers/net/wireless/ath/ath11k/core.c:1793:\t\tdata += ie_len;\ndrivers/net/wireless/ath/ath11k/core.c-1794-\t}\n--\ndrivers/net/wireless/ath/ath11k/fw.c=11=static int ath11k_fw_request_firmware_api_n(struct ath11k_base *ab,\n--\ndrivers/net/wireless/ath/ath11k/fw.c-13-{\ndrivers/net/wireless/ath/ath11k/fw.c:14:\tsize_t magic_len, len, ie_len;\ndrivers/net/wireless/ath/ath11k/fw.c-15-\tint ie_id, i, index, bit, ret;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-64-\t\tie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath11k/fw.c:65:\t\tie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath11k/fw.c-66-\n--\ndrivers/net/wireless/ath/ath11k/fw.c-69-\ndrivers/net/wireless/ath/ath11k/fw.c:70:\t\tif (len \u003c ie_len) {\ndrivers/net/wireless/ath/ath11k/fw.c-71-\t\t\tath11k_err(ab, \"Invalid length for FW IE %d (%zu \u003c %zu)\\n\",\ndrivers/net/wireless/ath/ath11k/fw.c:72:\t\t\t\t   ie_id, len, ie_len);\ndrivers/net/wireless/ath/ath11k/fw.c-73-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-78-\t\tcase ATH11K_FW_IE_TIMESTAMP:\ndrivers/net/wireless/ath/ath11k/fw.c:79:\t\t\tif (ie_len != sizeof(u32))\ndrivers/net/wireless/ath/ath11k/fw.c-80-\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-89-\t\t\t\t   \"found firmware features ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath11k/fw.c:90:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath11k/fw.c-91-\n--\ndrivers/net/wireless/ath/ath11k/fw.c-95-\ndrivers/net/wireless/ath/ath11k/fw.c:96:\t\t\t\tif (index == ie_len)\ndrivers/net/wireless/ath/ath11k/fw.c-97-\t\t\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-109-\t\t\t\t   \"found fw image ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath11k/fw.c:110:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath11k/fw.c-111-\ndrivers/net/wireless/ath/ath11k/fw.c-112-\t\t\tab-\u003efw.amss_data = data;\ndrivers/net/wireless/ath/ath11k/fw.c:113:\t\t\tab-\u003efw.amss_len = ie_len;\ndrivers/net/wireless/ath/ath11k/fw.c-114-\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-117-\t\t\t\t   \"found m3 image ie (%zd B)\\n\",\ndrivers/net/wireless/ath/ath11k/fw.c:118:\t\t\t\t   ie_len);\ndrivers/net/wireless/ath/ath11k/fw.c-119-\ndrivers/net/wireless/ath/ath11k/fw.c-120-\t\t\tab-\u003efw.m3_data = data;\ndrivers/net/wireless/ath/ath11k/fw.c:121:\t\t\tab-\u003efw.m3_len = ie_len;\ndrivers/net/wireless/ath/ath11k/fw.c-122-\t\t\tbreak;\n--\ndrivers/net/wireless/ath/ath11k/fw.c-128-\t\t/* jump over the padding */\ndrivers/net/wireless/ath/ath11k/fw.c:129:\t\tie_len = ALIGN(ie_len, 4);\ndrivers/net/wireless/ath/ath11k/fw.c-130-\ndrivers/net/wireless/ath/ath11k/fw.c-131-\t\t/* make sure there's space for padding */\ndrivers/net/wireless/ath/ath11k/fw.c:132:\t\tif (ie_len \u003e len)\ndrivers/net/wireless/ath/ath11k/fw.c-133-\t\t\tbreak;\ndrivers/net/wireless/ath/ath11k/fw.c-134-\ndrivers/net/wireless/ath/ath11k/fw.c:135:\t\tlen -= ie_len;\ndrivers/net/wireless/ath/ath11k/fw.c:136:\t\tdata += ie_len;\ndrivers/net/wireless/ath/ath11k/fw.c-137-\t}\n--\ndrivers/net/wireless/ath/ath11k/mac.c=1348=static void ath11k_mac_setup_nontx_vif_rsnie(struct ath11k_vif *arvif,\n--\ndrivers/net/wireless/ath/ath11k/mac.c-1355-\t\tint i;\ndrivers/net/wireless/ath/ath11k/mac.c:1356:\t\tu8 nie_len;\ndrivers/net/wireless/ath/ath11k/mac.c-1357-\t\tconst u8 *nie = cfg80211_find_ext_ie(WLAN_EID_EXT_NON_INHERITANCE,\n--\ndrivers/net/wireless/ath/ath11k/mac.c-1361-\ndrivers/net/wireless/ath/ath11k/mac.c:1362:\t\tnie_len = nie[1];\ndrivers/net/wireless/ath/ath11k/mac.c-1363-\t\tnie += 2;\ndrivers/net/wireless/ath/ath11k/mac.c:1364:\t\tfor (i = 0; i \u003c nie_len; i++) {\ndrivers/net/wireless/ath/ath11k/mac.c-1365-\t\t\tif (nie[i] == WLAN_EID_RSN) {\n--\ndrivers/net/wireless/ath/ath11k/mac.c=4183=static int ath11k_mac_op_hw_scan(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/ath/ath11k/mac.c-4244-\ndrivers/net/wireless/ath/ath11k/mac.c:4245:\tif (req-\u003eie_len) {\ndrivers/net/wireless/ath/ath11k/mac.c:4246:\t\targ-\u003eextraie.ptr = kmemdup(req-\u003eie, req-\u003eie_len, GFP_KERNEL);\ndrivers/net/wireless/ath/ath11k/mac.c-4247-\t\tif (!arg-\u003eextraie.ptr) {\n--\ndrivers/net/wireless/ath/ath11k/mac.c-4250-\t\t}\ndrivers/net/wireless/ath/ath11k/mac.c:4251:\t\targ-\u003eextraie.len = req-\u003eie_len;\ndrivers/net/wireless/ath/ath11k/mac.c-4252-\t}\n--\ndrivers/net/wireless/ath/ath11k/mac.c=10442=static int __ath11k_mac_register(struct ath11k *ar)\n--\ndrivers/net/wireless/ath/ath11k/mac.c-10538-\tar-\u003ehw-\u003ewiphy-\u003emax_scan_ssids = WLAN_SCAN_PARAMS_MAX_SSID;\ndrivers/net/wireless/ath/ath11k/mac.c:10539:\tar-\u003ehw-\u003ewiphy-\u003emax_scan_ie_len = WLAN_SCAN_PARAMS_MAX_IE_LEN;\ndrivers/net/wireless/ath/ath11k/mac.c-10540-\n--\ndrivers/net/wireless/ath/ath11k/mac.c-10565-\t\tar-\u003ehw-\u003ewiphy-\u003emax_match_sets = WMI_PNO_MAX_SUPP_NETWORKS;\ndrivers/net/wireless/ath/ath11k/mac.c:10566:\t\tar-\u003ehw-\u003ewiphy-\u003emax_sched_scan_ie_len = WMI_PNO_MAX_IE_LENGTH;\ndrivers/net/wireless/ath/ath11k/mac.c-10567-\t\tar-\u003ehw-\u003ewiphy-\u003emax_sched_scan_plans = WMI_PNO_MAX_SCHED_SCAN_PLANS;\n--\ndrivers/net/wireless/ath/ath11k/p2p.c=60=static size_t\ndrivers/net/wireless/ath/ath11k/p2p.c:61:ath11k_p2p_noa_ie_len_compute(const struct ath11k_wmi_p2p_noa_info *noa)\ndrivers/net/wireless/ath/ath11k/p2p.c-62-{\n--\ndrivers/net/wireless/ath/ath11k/p2p.c=93=static void __ath11k_p2p_noa_update(struct ath11k_vif *arvif,\n--\ndrivers/net/wireless/ath/ath11k/p2p.c-103-\ndrivers/net/wireless/ath/ath11k/p2p.c:104:\tlen = ath11k_p2p_noa_ie_len_compute(noa);\ndrivers/net/wireless/ath/ath11k/p2p.c-105-\tif (!len)\n--\ndrivers/net/wireless/ath/ath11k/wmi.c=1724=int ath11k_wmi_p2p_go_bcn_ie(struct ath11k *ar, u32 vdev_id,\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-1728-\tstruct wmi_p2p_go_set_beacon_ie_cmd *cmd;\ndrivers/net/wireless/ath/ath11k/wmi.c:1729:\tsize_t p2p_ie_len, aligned_len;\ndrivers/net/wireless/ath/ath11k/wmi.c-1730-\tstruct wmi_tlv *tlv;\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-1733-\ndrivers/net/wireless/ath/ath11k/wmi.c:1734:\tp2p_ie_len = p2p_ie[1] + 2;\ndrivers/net/wireless/ath/ath11k/wmi.c:1735:\taligned_len = roundup(p2p_ie_len, 4);\ndrivers/net/wireless/ath/ath11k/wmi.c-1736-\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-1746-\tcmd-\u003evdev_id = vdev_id;\ndrivers/net/wireless/ath/ath11k/wmi.c:1747:\tcmd-\u003eie_buf_len = p2p_ie_len;\ndrivers/net/wireless/ath/ath11k/wmi.c-1748-\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-1751-\t\t      FIELD_PREP(WMI_TLV_LEN, aligned_len);\ndrivers/net/wireless/ath/ath11k/wmi.c:1752:\tmemcpy(tlv-\u003evalue, p2p_ie, p2p_ie_len);\ndrivers/net/wireless/ath/ath11k/wmi.c-1753-\n--\ndrivers/net/wireless/ath/ath11k/wmi.c=2255=int ath11k_wmi_send_scan_start_cmd(struct ath11k *ar,\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2266-\tu32 *tmp_ptr;\ndrivers/net/wireless/ath/ath11k/wmi.c:2267:\tu16 extraie_len_with_pad = 0;\ndrivers/net/wireless/ath/ath11k/wmi.c-2268-\tstruct hint_short_ssid *s_ssid = NULL;\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2286-\tif (params-\u003eextraie.len \u0026\u0026 params-\u003eextraie.len \u003c= 0xFFFF)\ndrivers/net/wireless/ath/ath11k/wmi.c:2287:\t\textraie_len_with_pad =\ndrivers/net/wireless/ath/ath11k/wmi.c-2288-\t\t\troundup(params-\u003eextraie.len, sizeof(u32));\ndrivers/net/wireless/ath/ath11k/wmi.c:2289:\tlen += extraie_len_with_pad;\ndrivers/net/wireless/ath/ath11k/wmi.c-2290-\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2332-\tcmd-\u003enum_ssids = params-\u003enum_ssids;\ndrivers/net/wireless/ath/ath11k/wmi.c:2333:\tcmd-\u003eie_len = params-\u003eextraie.len;\ndrivers/net/wireless/ath/ath11k/wmi.c-2334-\tcmd-\u003en_probes = params-\u003en_probes;\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2388-\ndrivers/net/wireless/ath/ath11k/wmi.c:2389:\tlen = extraie_len_with_pad;\ndrivers/net/wireless/ath/ath11k/wmi.c-2390-\ttlv = ptr;\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2394-\ndrivers/net/wireless/ath/ath11k/wmi.c:2395:\tif (extraie_len_with_pad)\ndrivers/net/wireless/ath/ath11k/wmi.c-2396-\t\tmemcpy(ptr, params-\u003eextraie.ptr,\n--\ndrivers/net/wireless/ath/ath11k/wmi.c-2398-\ndrivers/net/wireless/ath/ath11k/wmi.c:2399:\tptr += extraie_len_with_pad;\ndrivers/net/wireless/ath/ath11k/wmi.c-2400-\n--\ndrivers/net/wireless/ath/ath11k/wmi.h=3278=struct  wmi_start_scan_cmd {\n--\ndrivers/net/wireless/ath/ath11k/wmi.h-3298-\tu32 num_ssids;\ndrivers/net/wireless/ath/ath11k/wmi.h:3299:\tu32 ie_len;\ndrivers/net/wireless/ath/ath11k/wmi.h-3300-\tu32 n_probes;\n--\ndrivers/net/wireless/ath/ath12k/core.c=310=static int ath12k_core_parse_bd_ie_board(struct ath12k_base *ab,\n--\ndrivers/net/wireless/ath/ath12k/core.c-320-\tint ret, board_ie_id;\ndrivers/net/wireless/ath/ath12k/core.c:321:\tsize_t board_ie_len;\ndrivers/net/wireless/ath/ath12k/core.c-322-\tconst void *board_ie_data;\n--\ndrivers/net/wireless/ath/ath12k/core.c-329-\t\tboard_ie_id = le32_to_cpu(hdr-\u003eid);\ndrivers/net/wireless/ath/ath12k/core.c:330:\t\tboard_ie_len = le32_to_cpu(hdr-\u003elen);\ndrivers/net/wireless/ath/ath12k/core.c-331-\t\tboard_ie_data = hdr-\u003edata;\n--\ndrivers/net/wireless/ath/ath12k/core.c-335-\ndrivers/net/wireless/ath/ath12k/core.c:336:\t\tif (buf_len \u003c ALIGN(board_ie_len, 4)) {\ndrivers/net/wireless/ath/ath12k/core.c-337-\t\t\tath12k_err(ab, \"invalid %s length: %zu \u003c %zu\\n\",\ndrivers/net/wireless/ath/ath12k/core.c-338-\t\t\t\t   ath12k_bd_ie_type_str(ie_id),\ndrivers/net/wireless/ath/ath12k/core.c:339:\t\t\t\t   buf_len, ALIGN(board_ie_len, 4));\ndrivers/net/wireless/ath/ath12k/core.c-340-\t\t\tret = -EINVAL;\n--\ndrivers/net/wireless/ath/ath12k/core.c-345-\t\t\tath12k_dbg_dump(ab, ATH12K_DBG_BOOT, \"board name\", \"\",\ndrivers/net/wireless/ath/ath12k/core.c:346:\t\t\t\t\tboard_ie_data, board_ie_len);\ndrivers/net/wireless/ath/ath12k/core.c-347-\ndrivers/net/wireless/ath/ath12k/core.c:348:\t\t\tif (board_ie_len != strlen(boardname))\n\n"
}

gemini-3.1-pro-preview

null

null

							input: 56959
							output: 29
							thoughts: 682
						

**Analyzing Potential Mesh Setup Vulnerability**

Okay, let me think this through. I've got this `setup->ie_len` value and I need to figure out how it's being used. First, I see it's only used in `cfg80211` and `mac80211`, which is a good starting point. In `mac80211`, `ifmsh->ie_len` is a `u8`, which initially gave me pause. I was thinking, if `setup->ie_len` is a `size_t` and a large value is passed, it could be truncated when assigned to `ifmsh->ie_len`.

Then I dove into `copy_mesh_setup` in `net/mac80211/cfg.c`. Right, there's a `kmemdup` call. If `setup->ie_len` is, say, 256, `kmemdup` allocates 256 bytes, fine. But *then* `ifmsh->ie_len` is assigned, and it is truncated to 0! That's odd. `ifmsh->ie` now points to a 256-byte buffer, but `ifmsh->ie_len` is 0. That's a potential problem right there. The code then uses `ifmsh->ie` with `ifmsh->ie_len` for length, which is 0. So it reads zero bytes. It feels like a bug, but maybe it's more subtle.

Let me think again. Hang on, the truncation is happening. If `setup->ie_len` is 256, `ifmsh->ie_len` becomes 0, and that's the end of it. It's not used, it's 0. But I'm not sure if it is actually used.

Now, let's step back. I need to trace where the value is set in the first place. Ah, in `nl80211_parse_mesh_setup`:

```c
	if (tb[NL80211_MESH_SETUP_IE]) {
		struct nlattr *ieattr =
			tb[NL80211_MESH_SETUP_IE];
		setup->ie = nla_data(ieattr);
		setup->ie_len = nla_len(ieattr);
	}
```

That's the point. Previously, with `setup->ie_len` as `u8`,  `nla_len(ieattr)` (up to 65535) would be truncated. If `nla_len(ieattr)` were 256, then `setup->ie_len` would become 0, and the logic is exactly the same as I described earlier.

So now `setup->ie_len` is a `size_t`, so 256 is preserved.  So the `kmemdup` call allocates the correct amount of memory. Then the `ifmsh->ie_len` truncation to 0 happens. So the resulting behavior is exactly the same as if we *had* a `u8` there.

Hmm, this is not really a bug, it is doing what it is supposed to do. Wait, is there any other driver that uses `setup->ie_len`?  Let me quickly grep in `drivers/net/wireless/` for `join_mesh`. I need to ensure there are no other places where this could be a problem.

no matches

{
  "Expression": "join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 58462
							output: 35
							thoughts: 45
						

Okay, here's my interpretation of that thought process, assuming I'm deep in the weeds of network stack code:

**Checking the Mesh Join Implementation**

Hmm, hold on a second. I thought `join_mesh` was a more generic interface, but it's nagging at me that it might be specific to `mac80211`. That would be unusual, but I better verify it. I need to be sure before I make any assumptions. Let me quickly jump into `include/net/cfg80211.h`. That's where all the fundamental cfg80211 definitions should reside. That's the first place to look to confirm where the function is defined. Hopefully, this confirms my initial thought.

{
  "Expression": "join_mesh",
  "PathPrefix": "include/net/cfg80211.h"
}

{
  "Output": "include/net/cfg80211.h=4822=struct mgmt_frame_regs {\n--\ninclude/net/cfg80211.h-4920- * @dump_mpp: dump mesh proxy path callback -- resume dump at index @idx\ninclude/net/cfg80211.h:4921: * @join_mesh: join the mesh network with the specified parameters\ninclude/net/cfg80211.h-4922- *\t(invoked with the wireless_dev mutex held)\n--\ninclude/net/cfg80211.h-4943- * @libertas_set_mesh_channel: Only for backward compatibility for libertas,\ninclude/net/cfg80211.h:4944: *\tas it doesn't implement join_mesh and needs to set the channel to\ninclude/net/cfg80211.h-4945- *\tjoin the mesh instead.\n--\ninclude/net/cfg80211.h=5257=struct cfg80211_ops {\n--\ninclude/net/cfg80211.h-5344-\t\t\t\t      const struct mesh_config *nconf);\ninclude/net/cfg80211.h:5345:\tint\t(*join_mesh)(struct wiphy *wiphy, struct net_device *dev,\ninclude/net/cfg80211.h-5346-\t\t\t     const struct mesh_config *conf,\n"
}

gemini-3.1-pro-preview

null

null

							input: 59080
							output: 30
							thoughts: 33
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Analyzing the `join_mesh` Callback**

Alright, so I'm zeroing in on this `join_mesh` function. It's flagged as a `cfg80211_ops` callback, which immediately tells me this is a critical entry point for mesh network operations within the wireless configuration framework. My immediate next step is to drill down and see which specific wireless drivers actually implement this function. Understanding the landscape of those implementations will give me the best insight into how they handle the intricacies of joining a mesh network, and the differing approaches and potential pitfalls between each driver's implementation. Knowing which drivers leverage `join_mesh` is a key stepping stone to getting a good grasp of the control plane.

no matches

{
  "Expression": "\\.join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 59324
							output: 29
							thoughts: 34
						

Okay, here's my interpretation of those thoughts, crafted with the understanding that I'm talking to a fellow expert:

**Investigating the `join_mesh` Implementation**

Hmm, that's interesting. The thought that popped into my head was, "Hang on a minute, isn't `join_mesh` *only* implemented by `mac80211`?" My gut tells me that's the case, but I need to confirm that suspicion before I go any further down this particular rabbit hole. Just to be absolutely sure, I'd better double-check the driver implementations. Time to take a look and see if I'm right, or if there's been an update somewhere along the line that I'm not aware of. Gotta make sure I'm not missing anything crucial here! Let's get to the bottom of this.

no matches

{
  "Expression": "join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 59584
							output: 43
							thoughts: 120
						

**Investigating the `join_mesh` Implementation**

Okay, so I'm digging through the kernel code, specifically looking for where `join_mesh` functionality is handled within the wireless networking stack. I started by checking the `drivers/net/wireless/` directory, expecting to find multiple implementations, but... nothing. That's a bit surprising. It looks like the `mac80211` subsystem is the sole provider here. 

Alright, so let's focus on `mac80211` then. I'm taking a closer look at the data structures, specifically the `ifmsh->ie_len` field. I seem to recall dealing with this one before, and it's nagging at me. The current code defines this as a `u8`, which is... potentially problematic depending on the size of the information element. I wonder if this has been changed somewhere along the way in another patch? I'm going to quickly check `net/mac80211/ieee80211_i.h`, line 815, to confirm the data type declaration for `ifmsh->ie_len` because I have a hunch it might have been updated.

{
  "Expression": "ie_len",
  "PathPrefix": "net/mac80211/ieee80211_i.h"
}

{
  "Output": "net/mac80211/ieee80211_i.h=443=struct ieee80211_mgd_assoc_data {\n--\nnet/mac80211/ieee80211_i.h-488-\nnet/mac80211/ieee80211_i.h:489:\tsize_t ie_len;\nnet/mac80211/ieee80211_i.h-490-\tu8 *ie_pos; /* used to fill ie[] with link[].elems */\n--\nnet/mac80211/ieee80211_i.h=655=struct ieee80211_if_ibss {\n--\nnet/mac80211/ieee80211_i.h-671-\tu8 ssid[IEEE80211_MAX_SSID_LEN];\nnet/mac80211/ieee80211_i.h:672:\tu8 ssid_len, ie_len;\nnet/mac80211/ieee80211_i.h-673-\tu8 *ie;\n--\nnet/mac80211/ieee80211_i.h=770=struct ieee80211_if_mesh {\n--\nnet/mac80211/ieee80211_i.h-814-\tconst u8 *ie;\nnet/mac80211/ieee80211_i.h:815:\tu8 ie_len;\nnet/mac80211/ieee80211_i.h-816-\tenum {\n--\nnet/mac80211/ieee80211_i.h=2704=int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,\n--\nnet/mac80211/ieee80211_i.h-2706-\t\t\t     struct ieee80211_scan_ies *ie_desc,\nnet/mac80211/ieee80211_i.h:2707:\t\t\t     const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2708-\t\t\t     u8 bands_used, u32 *rate_masks,\n--\nnet/mac80211/ieee80211_i.h=2711=struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/ieee80211_i.h-2715-\t\t\t\t\t  const u8 *ssid, size_t ssid_len,\nnet/mac80211/ieee80211_i.h:2716:\t\t\t\t\t  const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2717-\t\t\t\t\t  u32 flags);\n--\nnet/mac80211/ieee80211_i.h=2739=u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,\nnet/mac80211/ieee80211_i.h-2740-\t\t\t\tconst struct cfg80211_chan_def *chandef);\nnet/mac80211/ieee80211_i.h:2741:u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2742-u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef);\n--\nnet/mac80211/ieee80211_i.h=2953=void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);\nnet/mac80211/ieee80211_i.h-2954-\nnet/mac80211/ieee80211_i.h:2955:u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2956-\n"
}

gemini-3.1-pro-preview

null

null

							input: 61277
							output: 29
							thoughts: 1152
						

**Analysis of the Mesh Setup IE Length Change**

Okay, so I'm looking at this patch and my initial thought is, "Yes, `ifmsh->ie_len` *is* a `u8`." The core of this patch seems to be changing `setup->ie_len` from a `u8` to a `size_t` in `struct mesh_setup`. That's the crux of the matter.  My immediate concern is truncation, which I already see here.  If `setup->ie_len` is `size_t` but eventually assigned to `ifmsh->ie_len`, a `u8`, then we've got a potential issue with the IE length being truncated, and I need to figure out where that's happening.

I reviewed the code, it looks like `nl80211_parse_mesh_setup` is now able to handle IEs up to 65535 bytes due to the `size_t` change.  That much is clear. The `setup` is passed through a chain of functions: `__cfg80211_join_mesh`, `rdev_join_mesh`, and `mac80211_config_ops.join_mesh`, which calls `ieee80211_join_mesh`. Inside `ieee80211_join_mesh`, we arrive at `copy_mesh_setup`, which is where the memory allocation and copying happen.

Okay, let's step through `copy_mesh_setup`.  It *does* indeed allocate memory using `kmemdup` based on `setup->ie_len`, which is now `size_t`. That's good, so far.  However, this is where the potential problem lies. The code copies `setup->ie_len` *into* `ifmsh->ie_len`, which is a `u8`.  

If `setup->ie_len` is, say, 256, `kmemdup` allocates 256 bytes, as expected. But then, *boom*, `ifmsh->ie_len` is truncated to 0!  Now `ifmsh->ie` points to a valid 256-byte buffer, but the code thinks it's zero bytes long.  If it reads the buffer based on this length, it won't read anything.

If `setup->ie_len` is 257, `kmemdup` allocates 257 bytes. Then `ifmsh->ie_len` becomes 1. Only 1 byte is read.

I need to quickly assess if there are any security issues here. Is this an out-of-bounds read or write situation? Given that `kmemdup` allocates the correct amount, and the maximum truncated length is 255 (if `setup->ie_len` is 65535), it seems there is no out-of-bounds read/write, at least not directly. But the code *thinks* it's reading the wrong amount of data.

If `setup->ie_len` is 0, `kmemdup` is not called, and the length is 0, which is also not a problem.

And in `ieee80211_leave_mesh`, the allocated buffer is correctly freed with `kfree(sdata->u.mesh.ie)`. So, no memory leak.

So, why *did* they change `ie_len` to `size_t`? Maybe to address an issue with `nla_len(ieattr)` returning an `int` and avoiding warnings or truncation when assigning to a `u8`. Or maybe to increase the supported IE size as my hunch suggested.

But, *aha!* The crucial oversight is that they *didn't* change `ifmsh->ie_len` to `size_t` in `mac80211`! The original bug is still present. This means a 256-byte IE could be allocated but then handled as zero bytes, potentially leading to incorrect behavior.

The core question now is, is this a functional change that needs fuzzing? YES, absolutely. The type change of `ie_len` in `struct mesh_setup` from `u8` to `size_t` means that `kmemdup` now allocates the correct amount of memory in all cases. This directly impacts how IEs are handled. For instance, if the original `nla_len(ieattr)` was 256, the IE length would previously have been truncated to 0, and `kmemdup` wouldn't have been called. Now, with the patch, we allocate 25

no matches

{
  "Expression": "mesh_setup",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 63497
							output: 30
							thoughts: 122
						

Okay, let's see what we've got here.

**Analyzing Potential IE Leakage in Mesh Join Operations**

Right, so I've hit a dead end in the driver space. No matches there. That tells me the likely suspects are the core wireless networking components: `cfg80211` and `mac80211`. Now, I need to focus on where the information element length, `setup->ie_len`, could potentially be involved. The initial thought was `trace_rdev_join_mesh`, but after a quick review, it seems that function isn't logging `setup->ie_len`. That's good; it eliminates one possibility.

My next step is to drill down into the join mesh functions. The most likely places to find the usage of `setup->ie_len` are within `cfg80211_join_mesh` and, potentially, the internal function `__cfg80211_join_mesh`. I'll need to examine those functions closely to see how, and *if*, `setup->ie_len` is used there. This should point me towards where a potential information disclosure could occur.

{
  "Expression": "ie_len",
  "PathPrefix": "net/wireless/mesh.c"
}

{
  "Output": "net/wireless/mesh.c=88=const struct mesh_setup default_mesh_setup = {\n--\nnet/wireless/mesh.c-94-\t.ie = NULL,\nnet/wireless/mesh.c:95:\t.ie_len = 0,\nnet/wireless/mesh.c-96-\t.is_secure = false,\n"
}

gemini-3.1-pro-preview

null

null

							input: 63997
							output: 42
							thoughts: 29
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Analyzing Mesh Configuration Parsing**

Right, so I'm revisiting this code because I've encountered a specific scenario where a particular configuration isn't being applied as expected. The initial suspicion is that the relevant code path isn't being triggered, or perhaps some condition is short-circuiting the process.

My immediate thought is to rule out a false positive. Let's start by methodically double-checking the code execution paths. It seems pretty clear this wasn't called where it was supposed to be.

The logical next step is to scrutinize the `nl80211_parse_mesh_setup` function again, starting with input variables. I want to confirm whether any of the inputs are not what I expect, or if the logic within the function is flawed. Specifically, I'll pay close attention to the parsing logic and the conditional statements that determine whether a setting is applied, and why it might have been missed. My primary objective is to find out exactly where the process is broken, and eliminate any other possible causes.

{
  "File": "net/wireless/nl80211.c",
  "FirstLine": 10418,
  "LineCount": 10
}

{
  "Contents": "10418:\t\tif (tb[NL80211_MESH_SETUP_IE]) {\n10419:\t\t\tstruct nlattr *ieattr =\n10420:\t\t\t\ttb[NL80211_MESH_SETUP_IE];\n10421:\t\t\tsetup-\u003eie = nla_data(ieattr);\n10422:\t\t\tsetup-\u003eie_len = nla_len(ieattr);\n10423:\t\t}\n10424:\t\tif (tb[NL80211_MESH_SETUP_USERSPACE_MPM] \u0026\u0026\n10425:\t\t    !(rdev-\u003ewiphy.features \u0026 NL80211_FEATURE_USERSPACE_MPM))\n10426:\t\t\treturn -EINVAL;\n10427:\t\tsetup-\u003euser_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);\n"
}

gemini-3.1-pro-preview

null

null

							input: 64548
							output: 42
							thoughts: 49
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience:

**Analyzing the Potential Impact of an Attribute Length Assignment**

Alright, so `setup->ie_len` is being assigned the result of `nla_len(ieattr)`. That seems straightforward enough, right? I'm familiar with those NLA (Netlink Attribute) functions, and that assignment makes logical sense. It's standard procedure to get the length of the attribute data.

But then, my mind jumps ahead... I need to consider all the places this variable is used, and it hits me: what if `setup->ie_len` is subsequently used within `nl80211_join_mesh`? That's the critical point here. The implications of that assignment, its propagation, and how it impacts that function's behavior are what need deeper examination. I have to look carefully at how `ie_len` is used within that context. I have to verify that the value assigned is what it should be, and that no unexpected buffer overflows or length mismatches can occur when that value is used as an input variable for other function calls.

{
  "File": "net/wireless/nl80211.c",
  "FirstLine": 15102,
  "LineCount": 50
}

{
  "Contents": "15102:\tstatic int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)\n15103:\t{\n15104:\t\tstruct cfg80211_registered_device *rdev = info-\u003euser_ptr[0];\n15105:\t\tstruct net_device *dev = info-\u003euser_ptr[1];\n15106:\t\tstruct mesh_config cfg;\n15107:\t\tstruct mesh_setup setup;\n15108:\t\tint err;\n15109:\t\n15110:\t\t/* start with default */\n15111:\t\tmemcpy(\u0026cfg, \u0026default_mesh_config, sizeof(cfg));\n15112:\t\tmemcpy(\u0026setup, \u0026default_mesh_setup, sizeof(setup));\n15113:\t\n15114:\t\tif (info-\u003eattrs[NL80211_ATTR_MESH_CONFIG]) {\n15115:\t\t\t/* and parse parameters if given */\n15116:\t\t\terr = nl80211_parse_mesh_config(info, \u0026cfg, NULL);\n15117:\t\t\tif (err)\n15118:\t\t\t\treturn err;\n15119:\t\t}\n15120:\t\n15121:\t\tif (!info-\u003eattrs[NL80211_ATTR_MESH_ID] ||\n15122:\t\t    !nla_len(info-\u003eattrs[NL80211_ATTR_MESH_ID]))\n15123:\t\t\treturn -EINVAL;\n15124:\t\n15125:\t\tsetup.mesh_id = nla_data(info-\u003eattrs[NL80211_ATTR_MESH_ID]);\n15126:\t\tsetup.mesh_id_len = nla_len(info-\u003eattrs[NL80211_ATTR_MESH_ID]);\n15127:\t\n15128:\t\tif (info-\u003eattrs[NL80211_ATTR_MCAST_RATE] \u0026\u0026\n15129:\t\t    !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,\n15130:\t\t\t\t    nla_get_u32(info-\u003eattrs[NL80211_ATTR_MCAST_RATE])))\n15131:\t\t\t\treturn -EINVAL;\n15132:\t\n15133:\t\tif (info-\u003eattrs[NL80211_ATTR_BEACON_INTERVAL]) {\n15134:\t\t\tsetup.beacon_interval =\n15135:\t\t\t\tnla_get_u32(info-\u003eattrs[NL80211_ATTR_BEACON_INTERVAL]);\n15136:\t\n15137:\t\t\terr = cfg80211_validate_beacon_int(rdev,\n15138:\t\t\t\t\t\t\t   NL80211_IFTYPE_MESH_POINT,\n15139:\t\t\t\t\t\t\t   setup.beacon_interval);\n15140:\t\t\tif (err)\n15141:\t\t\t\treturn err;\n15142:\t\t}\n15143:\t\n15144:\t\tif (info-\u003eattrs[NL80211_ATTR_DTIM_PERIOD]) {\n15145:\t\t\tsetup.dtim_period =\n15146:\t\t\t\tnla_get_u32(info-\u003eattrs[NL80211_ATTR_DTIM_PERIOD]);\n15147:\t\t\tif (setup.dtim_period \u003c 1 || setup.dtim_period \u003e 100)\n15148:\t\t\t\treturn -EINVAL;\n15149:\t\t}\n15150:\t\n15151:\t\tif (info-\u003eattrs[NL80211_ATTR_MESH_SETUP]) {\n"
}

gemini-3.1-pro-preview

null

null

							input: 65863
							output: 36
							thoughts: 533
						

**Analyzing the Mesh Setup Length Change**

Okay, first thing I've noticed is that `setup.ie_len` isn't actually being *used* directly in this context, which is the crux of this modification. Essentially, the code is changing so that `setup.ie_len` can handle values greater than 255. When the `setup` structure is passed to `mac80211`, `copy_mesh_setup` will use the value of `setup.ie_len` (up to 65535, of course) to allocate memory. However, the assigned `ifmsh->ie_len` is truncated to `u8`. This means the value will be `setup.ie_len & 0xFF`, resulting in the `ifmsh->ie_len` being a value between 0 and 255. The `ifmsh->ie` pointer then points to the allocated memory.

The core question here is whether this introduces any bugs. Let's break it down:

If `setup.ie_len` is 256, `kmemdup` allocates 256 bytes. `ifmsh->ie_len` becomes 0. So, we've allocated a 256-byte buffer, but the code effectively treats it as a zero-length buffer. When `ifmsh` is freed, `kfree(ifmsh->ie)` correctly frees the 256-byte buffer, so there is no memory leak.

Regarding out-of-bounds access, there can't be one. The allocated buffer is always larger than the value stored in `ifmsh->ie_len`.

If `setup.ie_len` is 65535, `kmemdup` allocates 65535 bytes. `ifmsh->ie_len` becomes 255. The allocated buffer is 65535 bytes, but the effective length is 255 bytes. Still, no out-of-bounds read/write.

If `setup.ie_len` is 0, `kmemdup` is *not* called. `ifmsh->ie_len` is set to 0. It is a valid edge case.

If `setup.ie_len` is 255, `kmemdup` allocates 255 bytes, `ifmsh->ie_len` remains 255, so it all works as intended.

Alright, so the core mechanism seems safe. But, I should check the rest of the code for any uses of `setup.ie_len`, just to be sure. Let's look at `net/wireless/core.c` for any uses of `default_mesh_setup`.

{
  "File": "net/wireless/core.c",
  "FirstLine": 1790,
  "LineCount": 10
}

{
  "Contents": "1790:\t\t\t\t\t/* backward compat code... */\n1791:\t\t\t\t\tstruct mesh_setup setup;\n1792:\t\t\t\t\tmemcpy(\u0026setup, \u0026default_mesh_setup,\n1793:\t\t\t\t\t\t\tsizeof(setup));\n1794:\t\t\t\t\t /* back compat only needed for mesh_id */\n1795:\t\t\t\t\tsetup.mesh_id = wdev-\u003eu.mesh.id;\n1796:\t\t\t\t\tsetup.mesh_id_len = wdev-\u003eu.mesh.id_up_len;\n1797:\t\t\t\t\tif (wdev-\u003eu.mesh.id_up_len)\n1798:\t\t\t\t\t\t__cfg80211_join_mesh(rdev, dev,\n1799:\t\t\t\t\t\t\t\t\u0026setup,\n"
}

gemini-3.1-pro-preview

null

null

							input: 67223
							output: 41
							thoughts: 590
						

**Analyzing the Impact of a Type Change in mac80211 IE Handling**

Okay, so this change appears to be about maintaining backward compatibility, specifically regarding how Information Elements (IEs) are handled in `mac80211`. My initial thought is, "why the change?" It seems like a minor adjustment, but I need to dig deeper. I need to be sure the change doesn't break anything else, particularly in other drivers that might use related structures. I've already scanned `drivers/net/wireless/` for references to `join_mesh` and `mesh_setup`, coming up empty. This strongly suggests that `mac80211` is the sole consumer of this particular code path. That narrows the scope, which is good.

Now, why the specific change from `u8` to `size_t` for `ie_len`? Ah, I see: `nla_len(ieattr)` returns an `int`. If `ie_len` remained a `u8`, assigning the return value of `nla_len(ieattr)` could lead to truncation, potentially losing important length information. So, this is a bug fix. It prevents the loss of information when capturing the IE size.

But does this change introduce a new bug, or break something? Let's trace it. If `ie_len` was truncated previously, let's say `nla_len(ieattr)` was 256. Initially, `setup.ie_len` was 0. `kmemdup` was likely *not* called at all because `ie_len` was zero. Now, `setup.ie_len` will be 256. `kmemdup` *will* allocate and copy 256 bytes, but the critical problem is that `ifmsh->ie_len` is still a `u8`, so the value will be truncated back to 0. It seems the behavior is essentially unchanged – except, now, 256 bytes are allocated where 0 were.

What about a size slightly larger than 255 (the max of `u8`)? If `nla_len(ieattr)` is 257, previously, `setup.ie_len` was 1. `kmemdup` allocated and copied 1 byte. Then `ifmsh->ie_len` became 1 and only used 1 byte. Now, with the change, `setup.ie_len` is 257. `kmemdup` allocates and copies 257 bytes. `ifmsh->ie_len` still becomes 1, so the behaviour, in terms of usage, is still the same, even though more memory has been allocated. It's allocated and copied, but the driver still only uses 1 byte, due to the final truncation. It’s like a wasteful allocation.

The question then becomes: is there a scenario where `setup.ie_len` is used *without* being truncated down? I should re-examine `net/mac80211/cfg.c` again, just to make sure I haven't missed a place where this new `size_t` value might be directly used.

{
  "File": "net/mac80211/cfg.c",
  "FirstLine": 3119,
  "LineCount": 30
}

{
  "Contents": "3119:\tstatic int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,\n3120:\t\t\tconst struct mesh_setup *setup)\n3121:\t{\n3122:\t\tu8 *new_ie;\n3123:\t\tstruct ieee80211_sub_if_data *sdata = container_of(ifmsh,\n3124:\t\t\t\t\t\tstruct ieee80211_sub_if_data, u.mesh);\n3125:\t\tint i;\n3126:\t\n3127:\t\t/* allocate information elements */\n3128:\t\tnew_ie = NULL;\n3129:\t\n3130:\t\tif (setup-\u003eie_len) {\n3131:\t\t\tnew_ie = kmemdup(setup-\u003eie, setup-\u003eie_len,\n3132:\t\t\t\t\tGFP_KERNEL);\n3133:\t\t\tif (!new_ie)\n3134:\t\t\t\treturn -ENOMEM;\n3135:\t\t}\n3136:\t\tifmsh-\u003eie_len = setup-\u003eie_len;\n3137:\t\tifmsh-\u003eie = new_ie;\n3138:\t\n3139:\t\t/* now copy the rest of the setup parameters */\n3140:\t\tifmsh-\u003emesh_id_len = setup-\u003emesh_id_len;\n3141:\t\tmemcpy(ifmsh-\u003emesh_id, setup-\u003emesh_id, ifmsh-\u003emesh_id_len);\n3142:\t\tifmsh-\u003emesh_sp_id = setup-\u003esync_method;\n3143:\t\tifmsh-\u003emesh_pp_id = setup-\u003epath_sel_proto;\n3144:\t\tifmsh-\u003emesh_pm_id = setup-\u003epath_metric;\n3145:\t\tifmsh-\u003euser_mpm = setup-\u003euser_mpm;\n3146:\t\tifmsh-\u003emesh_auth_id = setup-\u003eauth_id;\n3147:\t\tifmsh-\u003esecurity = IEEE80211_MESH_SEC_NONE;\n3148:\t\tifmsh-\u003euserspace_handles_dfs = setup-\u003euserspace_handles_dfs;\n"
}

gemini-3.1-pro-preview

null

null

							input: 69113
							output: 43
							thoughts: 120
						

**Analyzing a Potential Memory Allocation Issue**

Okay, so I'm looking at this code and something's bugging me. Specifically, I'm concerned about how `ifmsh->ie_len` is handled. It's defined as a `u8`, which immediately sets off alarm bells for potential truncation issues. I need to be sure. I'm thinking, "Does the value get copied somewhere else?". Is `setup->ie_len` utilized in other parts of the code? Hmm, it doesn't appear to be. So, really, the only thing that changes is that `kmemdup` now potentially allocates more memory, and copies a larger chunk of memory. But hold on, the core issue remains – `ifmsh->ie_len` is still limited to the `u8` size, which I'm still certain can lead to truncation. My gut is telling me there's something amiss. Wait, I better be completely sure I have not seen a change where `ifmsh->ie_len` is a `size_t` already. Let me quickly verify that `ifmsh->ie_len` *is* a `size_t` in my local workspace. This could really save me some headaches.

{
  "Expression": "ie_len",
  "PathPrefix": "net/mac80211/ieee80211_i.h"
}

{
  "Output": "net/mac80211/ieee80211_i.h=443=struct ieee80211_mgd_assoc_data {\n--\nnet/mac80211/ieee80211_i.h-488-\nnet/mac80211/ieee80211_i.h:489:\tsize_t ie_len;\nnet/mac80211/ieee80211_i.h-490-\tu8 *ie_pos; /* used to fill ie[] with link[].elems */\n--\nnet/mac80211/ieee80211_i.h=655=struct ieee80211_if_ibss {\n--\nnet/mac80211/ieee80211_i.h-671-\tu8 ssid[IEEE80211_MAX_SSID_LEN];\nnet/mac80211/ieee80211_i.h:672:\tu8 ssid_len, ie_len;\nnet/mac80211/ieee80211_i.h-673-\tu8 *ie;\n--\nnet/mac80211/ieee80211_i.h=770=struct ieee80211_if_mesh {\n--\nnet/mac80211/ieee80211_i.h-814-\tconst u8 *ie;\nnet/mac80211/ieee80211_i.h:815:\tu8 ie_len;\nnet/mac80211/ieee80211_i.h-816-\tenum {\n--\nnet/mac80211/ieee80211_i.h=2704=int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,\n--\nnet/mac80211/ieee80211_i.h-2706-\t\t\t     struct ieee80211_scan_ies *ie_desc,\nnet/mac80211/ieee80211_i.h:2707:\t\t\t     const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2708-\t\t\t     u8 bands_used, u32 *rate_masks,\n--\nnet/mac80211/ieee80211_i.h=2711=struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,\n--\nnet/mac80211/ieee80211_i.h-2715-\t\t\t\t\t  const u8 *ssid, size_t ssid_len,\nnet/mac80211/ieee80211_i.h:2716:\t\t\t\t\t  const u8 *ie, size_t ie_len,\nnet/mac80211/ieee80211_i.h-2717-\t\t\t\t\t  u32 flags);\n--\nnet/mac80211/ieee80211_i.h=2739=u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,\nnet/mac80211/ieee80211_i.h-2740-\t\t\t\tconst struct cfg80211_chan_def *chandef);\nnet/mac80211/ieee80211_i.h:2741:u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2742-u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef);\n--\nnet/mac80211/ieee80211_i.h=2953=void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);\nnet/mac80211/ieee80211_i.h-2954-\nnet/mac80211/ieee80211_i.h:2955:u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata);\nnet/mac80211/ieee80211_i.h-2956-\n"
}

gemini-3.1-pro-preview

null

null

							input: 70811
							output: 37
							thoughts: 185
						

**Analyzing a Potential Memory Allocation Issue**

Okay, so looking at this code, it's clear that `ifmsh->ie_len` is *still* defined as a `u8`, which is a byte. So, this patch is probably incomplete. However, it does represent a functional change because it modifies the memory allocation performed by `kmemdup` within `copy_mesh_setup`.

Now, the question is: is this even worth fuzzing? Since it introduces a functional change, the answer is yes.

But hang on. Thinking deeper... `setup->ie_len` is actually defined as `size_t`. If `setup->ie_len` is substantially large, `kmemdup` will allocate a huge chunk of memory. Then `ifmsh->ie_len` gets truncated. Effectively, the buffer allocates more memory, which goes unused. That's a definite waste. But does that make it exploitable?

Hmm, I need to consider all the ways `setup->ie_len` is used. Let me go back and thoroughly review `net/wireless/nl80211.c` to make sure I don't miss anything.

{
  "Expression": "setup-\u003eie_len",
  "PathPrefix": "net/wireless/nl80211.c"
}

{
  "Output": "net/wireless/nl80211.c=10389=static int nl80211_parse_mesh_setup(struct genl_info *info,\n--\nnet/wireless/nl80211.c-10421-\t\tsetup-\u003eie = nla_data(ieattr);\nnet/wireless/nl80211.c:10422:\t\tsetup-\u003eie_len = nla_len(ieattr);\nnet/wireless/nl80211.c-10423-\t}\n"
}

gemini-3.1-pro-preview

null

null

							input: 71431
							output: 30
							thoughts: 379
						

**Analyzing the Mesh Join Process**

Okay, so I'm tracing the mesh join process here. It looks like `nl80211_parse_mesh_setup` is being called from `nl80211_join_mesh`. The important thing I'm gathering here is that `nl80211_parse_mesh_setup` is probably responsible for parsing any additional setup parameters provided for the mesh configuration. Then, this parsed `setup` structure is passed along to `__cfg80211_join_mesh`. This function then calls `rdev_join_mesh`, which in turn calls `mac80211_config_ops.join_mesh`. So it seems the core action is happening there, but so far I am only seeing a memory allocation using `kmemdup`, I need to see what's happening more broadly.

Now, my initial thought is, is there any other driver that implements `join_mesh`? Let me see. I already checked the obvious places, specifically `drivers/net/wireless/`, and found no matches for a direct `join_mesh` implementation. But, I didn't think about `drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c`, it's possible that this is where a specific implementation lives. However, I recall that `iwlwifi` generally uses the `mac80211` framework, so it probably doesn't implement `join_mesh` directly. A quick glance confirms that; it likely leverages the generic `mac80211` implementation.

Aha! That's it! I need to be broader in my search. I am remembering that `cfg80211` drivers can *directly* implement `join_mesh` if they don't use `mac80211`. Right. So, if I'm not finding any direct implementations in the `mac80211` framework, I should now check the drivers' `cfg80211_ops` to see if any of them have hooked into `join_mesh` directly.

no matches

{
  "Expression": "\\.join_mesh",
  "PathPrefix": "drivers/net/wireless/"
}

{
  "error": "no matches"
}

gemini-3.1-pro-preview

null

null

							input: 72314
							output: 35
							thoughts: 52
						

**Investigating the Implementation of Mesh Setup**

Okay, so I've hit a dead end with the initial search; no other obvious candidates implement this. Looks like `mac80211` is the sole provider. Now, before I jump to any conclusions, I need to take a step back and make sure I'm not missing something subtle. Is `mesh_setup` actually used anywhere else? Let's verify by checking the header file for `cfg80211`, specifically `include/net/cfg80211.h`. This should give me a more complete picture of the landscape before I proceed.

{
  "Expression": "mesh_setup",
  "PathPrefix": "include/net/cfg80211.h"
}

{
  "Output": "include/net/cfg80211.h=2736=struct mesh_config {\n--\ninclude/net/cfg80211.h-2770-/**\ninclude/net/cfg80211.h:2771: * struct mesh_setup - 802.11s mesh setup configuration\ninclude/net/cfg80211.h-2772- * @chandef: defines the channel to use\n--\ninclude/net/cfg80211.h-2796- */\ninclude/net/cfg80211.h:2797:struct mesh_setup {\ninclude/net/cfg80211.h-2798-\tstruct cfg80211_chan_def chandef;\n--\ninclude/net/cfg80211.h=5257=struct cfg80211_ops {\n--\ninclude/net/cfg80211.h-5346-\t\t\t     const struct mesh_config *conf,\ninclude/net/cfg80211.h:5347:\t\t\t     const struct mesh_setup *setup);\ninclude/net/cfg80211.h-5348-\tint\t(*leave_mesh)(struct wiphy *wiphy, struct net_device *dev);\n"
}

gemini-3.1-pro-preview

null

null

							input: 72870
							output: 40
							thoughts: 528
						

**Analyzing the Implications of a `mesh_setup` Change**

Okay, so I'm looking at this patch and my initial thought is that `mesh_setup` is only used within the `join_mesh` process. But, wait, I need to double-check if `setup->ie_len` is also used in `trace_rdev_join_mesh`... nope, we already checked, and it doesn't log `ie_len`.

Right, so the core of this change lies in `mac80211`'s `copy_mesh_setup` function. The key here is that `kmemdup` is now allocating `setup->ie_len` bytes, instead of casting it to `(u8)setup->ie_len`, which essentially was truncating to a single byte. Is this worth fuzzing? Absolutely! It's a functional change because it alters the allocated memory size!

If `setup->ie_len` is large, like, say, 65535, `kmemdup` will allocate a whopping 64KB buffer. That's reachable from userspace via `NL80211_CMD_JOIN_MESH`. So, yes, it's definitely reachable and a clear functional change that warrants close scrutiny.

Now, let's see if there are other changes hidden in this patch. Nope, it looks like it's just the type change of `ie_len` from `u8` to `size_t` within the `struct mesh_setup` in `cfg80211.h`.

Given that, I think the functions I need to focus on for fuzzing are: `nl80211_join_mesh`, `nl80211_parse_mesh_setup`, `ieee80211_join_mesh`, and `copy_mesh_setup`.

Time to check the config dependencies: `CONFIG_MAC80211`, `CONFIG_CFG80211`, and `CONFIG_MAC80211_MESH`. We should verify that `CONFIG_MAC80211_MESH` is defined so we can be sure the code is compiled in.

{
  "Expression": "config MAC80211_MESH",
  "PathPrefix": "net/mac80211/Kconfig"
}

{
  "Output": "net/mac80211/Kconfig=60=config MAC80211_KUNIT_TEST\n--\nnet/mac80211/Kconfig-69-\nnet/mac80211/Kconfig:70:config MAC80211_MESH\nnet/mac80211/Kconfig-71-\tbool \"Enable mac80211 mesh networking support\"\n--\nnet/mac80211/Kconfig=235=config MAC80211_MHWMP_DEBUG\n--\nnet/mac80211/Kconfig-247-\nnet/mac80211/Kconfig:248:config MAC80211_MESH_SYNC_DEBUG\nnet/mac80211/Kconfig-249-\tbool \"Verbose mesh synchronization debugging\"\n--\nnet/mac80211/Kconfig-258-\nnet/mac80211/Kconfig:259:config MAC80211_MESH_CSA_DEBUG\nnet/mac80211/Kconfig-260-\tbool \"Verbose mesh channel switch debugging\"\n--\nnet/mac80211/Kconfig-269-\nnet/mac80211/Kconfig:270:config MAC80211_MESH_PS_DEBUG\nnet/mac80211/Kconfig-271-\tbool \"Verbose mesh powersave debugging\"\n"
}

gemini-3.1-pro-preview

null

null

							input: 74285
							output: 42
							thoughts: 36
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, and delivered as a first-person summary:

**Mesh Networking Logic Check**

Right, `MAC80211_MESH` definitely exists. I've seen it, I know it's there. Now, the key question is whether or not `nl80211_join_mesh` is conditionally compiled. I need to quickly verify if that function is tied to a specific configuration option, perhaps the very macro I just confirmed exists. Knowing if it's conditional or not will dictate the next steps in my analysis. It'll directly impact how broadly that `join_mesh` function is available and used. Understanding the link between `MAC80211_MESH` and `nl80211_join_mesh` is crucial for the larger picture I'm working with.

{
  "Expression": "nl80211_join_mesh",
  "PathPrefix": "net/wireless/nl80211.c"
}

{
  "Output": "net/wireless/nl80211.c=15094=static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)\n--\nnet/wireless/nl80211.c-15101-\nnet/wireless/nl80211.c:15102:static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)\nnet/wireless/nl80211.c-15103-{\n--\nnet/wireless/nl80211.c=19547=static const struct genl_small_ops nl80211_small_ops[] = {\n--\nnet/wireless/nl80211.c-19984-\t\t.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,\nnet/wireless/nl80211.c:19985:\t\t.doit = nl80211_join_mesh,\nnet/wireless/nl80211.c-19986-\t\t.flags = GENL_UNS_ADMIN_PERM,\n"
}

gemini-3.1-pro-preview

null

null

							input: 74867
							output: 310
							thoughts: 1547
						

**Analysis of mac80211 Mesh Setup IE Handling**

Okay, let's break this down. First, it's clear that this code path is only active if `MAC80211_MESH` is enabled, and given the nature of the dependencies, it implicitly requires `CFG80211` and `MAC80211` as well, although those are standard. The real focus here is the mesh setup.

The core of the issue lies within how the information element (IE) length (`ie_len`) is handled when processing mesh setup information. Specifically, it seems there's a patch under review that aims to address an integer truncation vulnerability.

My concern stems from the fact that `ifmsh->ie_len` is defined as a `u8` (unsigned 8-bit integer) within `net/mac80211/ieee80211_i.h`. The problematic line is `ifmsh->ie_len = setup->ie_len;`. Prior to the patch, the `setup->ie_len` could be truncated because it was defined as `size_t` in `nl80211_parse_mesh_setup` and `kmemdup` was used.

The patch's goal appears to be to correct the type of `ifmsh->ie_len` to `size_t` too to allow `kmemdup` to allocate up to 65535 bytes now, fixing the truncation.

So, the patch author fixes the truncation in `nl80211_parse_mesh_setup` by changing the type of `ifmsh->ie_len` to size_t. The `mesh_setup` struct is passed to `ieee80211_join_mesh` and `copy_mesh_setup`, then `kmemdup` is called, which changes the amount of memory allocated.

The critical functions I need to keep in mind are: `nl80211_parse_mesh_setup`, `nl80211_join_mesh`, `ieee80211_join_mesh`, and `copy_mesh_setup`.

Now, the important thing here is that while this resolves a truncation issue, it *is* a functional change. Previously, a larger IE size was being truncated, effectively limiting the allocated memory. The change now allows for a *much* larger allocation size (up to 65535 bytes).  This could potentially introduce memory-related issues, or even functional behavioral differences in mesh operation.

I've checked the usage of `setup->ie_len` (or similar variables) in `net/wireless/sme.c` or other drivers, and it appears that `mac80211` is the only user.  Also, even if a large IE size is passed, the way it is used, specifically in `ieee80211_ie_split_vendor`, seems safe. No out-of-bounds reads occur, because `ifmsh->ie_len` is less than or equal to the allocated buffer size.

In summary, while the patch resolves the truncation issue in `nl80211_parse_mesh_setup`, the functional change of increasing the size that `kmemdup` allocates is significant.

Therefore, this area needs fuzzing to ensure that no memory leaks, out-of-memory conditions, or other unexpected behaviors are introduced.

{
  "EnableConfigs": [
    "MAC80211_MESH"
  ],
  "FocusSymbols": [
    "nl80211_join_mesh",
    "nl80211_parse_mesh_setup",
    "ieee80211_join_mesh",
    "copy_mesh_setup"
  ],
  "Reasoning": "The patch changes the type of `ie_len` in `struct mesh_setup` from `u8` to `size_t`. This prevents truncation of the IE length when parsing the `NL80211_MESH_SETUP_IE` attribute in `nl80211_parse_mesh_setup()`, which uses `nla_len()` (returning an `int`). The `mesh_setup` struct is then passed to the `join_mesh` callback, which is implemented by `mac80211` (`ieee80211_join_mesh()`). In `copy_mesh_setup()`, `kmemdup()` is called with `setup-\u003eie_len`. Previously, the length was truncated to `u8` (max 255), but now it can be up to 65535 bytes, changing the amount of memory allocated. This is a functional change in reachable core kernel logic (mac80211 mesh networking) and should be fuzzed.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "MAC80211_MESH"
  ],
  "FocusSymbols": [
    "nl80211_join_mesh",
    "nl80211_parse_mesh_setup",
    "ieee80211_join_mesh",
    "copy_mesh_setup"
  ],
  "Reasoning": "The patch changes the type of `ie_len` in `struct mesh_setup` from `u8` to `size_t`. This prevents truncation of the IE length when parsing the `NL80211_MESH_SETUP_IE` attribute in `nl80211_parse_mesh_setup()`, which uses `nla_len()` (returning an `int`). The `mesh_setup` struct is then passed to the `join_mesh` callback, which is implemented by `mac80211` (`ieee80211_join_mesh()`). In `copy_mesh_setup()`, `kmemdup()` is called with `setup-\u003eie_len`. Previously, the length was truncated to `u8` (max 255), but now it can be up to 65535 bytes, changing the amount of memory allocated. This is a functional change in reachable core kernel logic (mac80211 mesh networking) and should be fuzzed.",
  "WorthFuzzing": true
}