| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/08/07 10:48 | flow | patch-triage |
1mArgs:null Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_sendstream",
"tipc_sendmsg"
],
"KMSANReasoning": "The patch modifies `tipc_sk_push_backlog` to optionally splice the socket's write queue into a provided `xmitq` instead of transmitting the buffers directly via `tipc_node_xmit` when the destination is the local node. This is a logic change related to queue management and packet transmission flow. It does not introduce any new allocations, structure fields, or user-space copies that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free, double free, or out-of-bounds accesses on the skb queues) would be reliably caught by standard KASAN and other default bug detectors. Therefore, a dedicated KMSAN fuzzing session is not required.",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies the TIPC socket backlog processing to splice the transmit queue directly to the provided xmitq for local destinations, avoiding a call to tipc_node_xmit. This is a functional change in the TIPC networking subsystem reachable from user space via the AF_TIPC socket API.",
"WorthFuzzing": true
} |
| 1/1 | 2026/08/07 10:48 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 6a3d8628a0887c8f7056cf2403b326b175f1946b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Fri Aug 7 10:48:16 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/net/tipc/socket.c b/net/tipc/socket.c\nindex e564341e0216d..16d844fc8ca57 100644\n--- a/net/tipc/socket.c\n+++ b/net/tipc/socket.c\n@@ -156,7 +156,8 @@ static int tipc_sk_insert(struct tipc_sock *tsk);\n static void tipc_sk_remove(struct tipc_sock *tsk);\n static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);\n static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);\n-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack);\n+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n+\t\t\t\t struct sk_buff_head *xmitq);\n static int tipc_wait_for_connect(struct socket *sock, long *timeo_p);\n \n static const struct proto_ops packet_ops;\n@@ -560,7 +561,7 @@ static void __tipc_shutdown(struct socket *sock, int error)\n \t\t\t\t\t !tsk_conn_cong(tsk)));\n \n \t/* Push out delayed messages if in Nagle mode */\n-\ttipc_sk_push_backlog(tsk, false);\n+\ttipc_sk_push_backlog(tsk, false, NULL);\n \t/* Remove pending SYN */\n \t__skb_queue_purge(\u0026sk-\u003esk_write_queue);\n \n@@ -1268,7 +1269,8 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,\n /* tipc_sk_push_backlog(): send accumulated buffers in socket write queue\n * when socket is in Nagle mode\n */\n-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)\n+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n+\t\t\t\t struct sk_buff_head *xmitq)\n {\n \tstruct sk_buff_head *txq = \u0026tsk-\u003esk.sk_write_queue;\n \tstruct sk_buff *skb = skb_peek_tail(txq);\n@@ -1310,6 +1312,12 @@ static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)\n \t\ttsk-\u003epkt_cnt += skb_queue_len(txq);\n \ttsk-\u003esnt_unacked += tsk-\u003esnd_backlog;\n \ttsk-\u003esnd_backlog = 0;\n+\n+\tif (xmitq \u0026\u0026 in_own_node(net, dnode)) {\n+\t\tskb_queue_splice_tail_init(txq, xmitq);\n+\t\treturn;\n+\t}\n+\n \trc = tipc_node_xmit(net, txq, dnode, tsk-\u003eportid);\n \tif (rc == -ELINKCONG)\n \t\ttsk-\u003econg_link_cnt = 1;\n@@ -1367,7 +1375,7 @@ static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n \t\t\tgoto exit;\n \n \t\twas_cong = tsk_conn_cong(tsk);\n-\t\ttipc_sk_push_backlog(tsk, msg_nagle_ack(hdr));\n+\t\ttipc_sk_push_backlog(tsk, msg_nagle_ack(hdr), xmitq);\n \t\ttsk-\u003esnt_unacked -= msg_conn_ack(hdr);\n \t\tif (tsk-\u003epeer_caps \u0026 TIPC_BLOCK_FLOWCTL)\n \t\t\ttsk-\u003esnd_win = msg_adv_win(hdr);\n@@ -2165,7 +2173,7 @@ static void tipc_sk_proto_rcv(struct sock *sk,\n \t\tsmp_wmb();\n \t\ttsk-\u003econg_link_cnt--;\n \t\twakeup = true;\n-\t\ttipc_sk_push_backlog(tsk, false);\n+\t\ttipc_sk_push_backlog(tsk, false, xmitq);\n \t\tbreak;\n \tcase GROUP_PROTOCOL:\n \t\ttipc_group_proto_rcv(grp, \u0026wakeup, hdr, inputq, xmitq);\n@@ -2256,7 +2264,7 @@ static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,\n \t\treturn false;\n \tcase TIPC_ESTABLISHED:\n \t\tif (!skb_queue_empty(\u0026sk-\u003esk_write_queue))\n-\t\t\ttipc_sk_push_backlog(tsk, false);\n+\t\t\ttipc_sk_push_backlog(tsk, false, xmitq);\n \t\t/* Accept only connection-based messages sent by peer */\n \t\tif (likely(con_msg \u0026\u0026 !err \u0026\u0026 pport == oport \u0026\u0026\n \t\t\t pnode == onode)) {\n"
} |
| 2/1 | 2026/08/07 10:48 | agent | patch-evaluator |
1mModel:best-expensive Args: null Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_sendstream",
"tipc_sendmsg"
],
"Reasoning": "The patch modifies the TIPC socket backlog processing to splice the transmit queue directly to the provided xmitq for local destinations, avoiding a call to tipc_node_xmit. This is a functional change in the TIPC networking subsystem reachable from user space via the AF_TIPC socket API.",
"WorthFuzzing": true
}Instruction: 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). - Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU. - Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove) that are executed only during PCI hot-unplug or sysfs driver unbind operations. 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. Prefer non-static, non-inlined API entrypoint functions over internal static helper functions (which are inlined by the compiler and do not have distinct symbol addresses). 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. Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed for Kbuild to compile the code statically into vmlinux. 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. Prompt: For your convenience, here is the diff of the changes:
commit 6a3d8628a0887c8f7056cf2403b326b175f1946b
Author: syz-cluster <triage@syzkaller.com>
Date: Fri Aug 7 10:48:16 2026 +0000
syz-cluster: applied patch under review
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e564341e0216d..16d844fc8ca57 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -156,7 +156,8 @@ static int tipc_sk_insert(struct tipc_sock *tsk);
static void tipc_sk_remove(struct tipc_sock *tsk);
static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack);
+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,
+ struct sk_buff_head *xmitq);
static int tipc_wait_for_connect(struct socket *sock, long *timeo_p);
static const struct proto_ops packet_ops;
@@ -560,7 +561,7 @@ static void __tipc_shutdown(struct socket *sock, int error)
!tsk_conn_cong(tsk)));
/* Push out delayed messages if in Nagle mode */
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, NULL);
/* Remove pending SYN */
__skb_queue_purge(&sk->sk_write_queue);
@@ -1268,7 +1269,8 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
/* tipc_sk_push_backlog(): send accumulated buffers in socket write queue
* when socket is in Nagle mode
*/
-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)
+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,
+ struct sk_buff_head *xmitq)
{
struct sk_buff_head *txq = &tsk->sk.sk_write_queue;
struct sk_buff *skb = skb_peek_tail(txq);
@@ -1310,6 +1312,12 @@ static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)
tsk->pkt_cnt += skb_queue_len(txq);
tsk->snt_unacked += tsk->snd_backlog;
tsk->snd_backlog = 0;
+
+ if (xmitq && in_own_node(net, dnode)) {
+ skb_queue_splice_tail_init(txq, xmitq);
+ return;
+ }
+
rc = tipc_node_xmit(net, txq, dnode, tsk->portid);
if (rc == -ELINKCONG)
tsk->cong_link_cnt = 1;
@@ -1367,7 +1375,7 @@ static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
goto exit;
was_cong = tsk_conn_cong(tsk);
- tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr));
+ tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr), xmitq);
tsk->snt_unacked -= msg_conn_ack(hdr);
if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
tsk->snd_win = msg_adv_win(hdr);
@@ -2165,7 +2173,7 @@ static void tipc_sk_proto_rcv(struct sock *sk,
smp_wmb();
tsk->cong_link_cnt--;
wakeup = true;
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, xmitq);
break;
case GROUP_PROTOCOL:
tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq);
@@ -2256,7 +2264,7 @@ static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,
return false;
case TIPC_ESTABLISHED:
if (!skb_queue_empty(&sk->sk_write_queue))
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, xmitq);
/* Accept only connection-based messages sent by peer */
if (likely(con_msg && !err && pport == oport &&
pnode == onode)) {
|
| 3/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3079 output: 30 thoughts: 163 Thoughts: **Fuzzing TIPC with a New Transmit Queue Modification** Okay, so I've got a patch here that's making a pretty significant change in `net/tipc/socket.c`. They're modifying `tipc_sk_push_backlog`, adding a `struct sk_buff_head *xmitq` parameter. And the real kicker? They're now using this `xmitq` to splice the transmit queue directly when the destination node is the local node – `in_own_node(net, dnode)`. This is a clear functional change, altering how TIPC, that network protocol we all know and love (and is accessible via the socket API, `AF_TIPC`), handles its internal queuing. This makes me think: it's fuzzing time. Any time there's a change that touches a networking subsystem like this, especially a core part of its queuing mechanisms, there's the potential for vulnerabilities. It's time to dig into this. I need to figure out what config options are related to TIPC to make sure I have everything enabled for fuzzing. I'll start by searching `net/tipc/Kconfig` for anything that has `config TIPC` in it. |
| 4/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "config TIPC",
"PathPrefix": "net/tipc/Kconfig"
}Results: {
"Output": "net/tipc/Kconfig-5-\nnet/tipc/Kconfig:6:menuconfig TIPC\nnet/tipc/Kconfig-7-\ttristate \"The TIPC Protocol\"\n--\nnet/tipc/Kconfig-23-\nnet/tipc/Kconfig:24:config TIPC_MEDIA_IB\nnet/tipc/Kconfig-25-\tbool \"InfiniBand media type support\"\n--\nnet/tipc/Kconfig-29-\t IP-over-InfiniBand devices.\nnet/tipc/Kconfig:30:config TIPC_MEDIA_UDP\nnet/tipc/Kconfig-31-\tbool \"IP/UDP media type support\"\n--\nnet/tipc/Kconfig-37-\nnet/tipc/Kconfig:38:config TIPC_CRYPTO\nnet/tipc/Kconfig-39-\tbool \"TIPC encryption support\"\n--\nnet/tipc/Kconfig-52-\nnet/tipc/Kconfig:53:config TIPC_DIAG\nnet/tipc/Kconfig-54-\ttristate \"TIPC: socket monitoring interface\"\n"
} |
| 5/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3825 output: 64 thoughts: 109 Thoughts: **Analyzing the TIPC Configuration** Okay, so the configuration I'm looking at is labeled `TIPC`. My immediate goal is to understand the flow within this configuration, so I need to identify the key focus points. Let's see... the text points to a function called `tipc_sk_push_backlog`, which it highlights as being `static`. That immediately flags it as something internal to a particular module or scope, making it potentially more localized in its impact. The next crucial step is to understand its interaction with the broader system. I need to know where it's *called* from. I see it listed as being called by `__tipc_shutdown`, `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, and `tipc_sk_filter_connect`. Now I need to quickly establish the scope of these functions as well. Are *they* static? Who calls *them*? Understanding the call chain will clarify the function's influence, and allow me to quickly establish the potential scope of its impact. |
| 6/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "__tipc_shutdown|tipc_sk_conn_proto_rcv|tipc_sk_proto_rcv|tipc_sk_filter_connect",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=403=static int tipc_sk_sock_err(struct socket *sock, long *timeout)\n--\nnet/tipc/socket.c-431-\twhile ((rc_ = !(condition_))) {\t\t\t\t\t \\\nnet/tipc/socket.c:432:\t\t/* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \\\nnet/tipc/socket.c-433-\t\tsmp_rmb(); \\\n--\nnet/tipc/socket.c=542=static void tipc_sk_callback(struct rcu_head *head)\n--\nnet/tipc/socket.c-549-/* Caller should hold socket lock for the socket. */\nnet/tipc/socket.c:550:static void __tipc_shutdown(struct socket *sock, int error)\nnet/tipc/socket.c-551-{\n--\nnet/tipc/socket.c=626=static int tipc_release(struct socket *sock)\n--\nnet/tipc/socket.c-641-\ttrace_tipc_sk_release(sk, NULL, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c:642:\t__tipc_shutdown(sock, TIPC_ERR_NO_PORT);\nnet/tipc/socket.c-643-\tsk-\u003esk_shutdown = SHUTDOWN_MASK;\n--\nnet/tipc/socket.c=1272=static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c-1326-/**\nnet/tipc/socket.c:1327: * tipc_sk_conn_proto_rcv - receive a connection mng protocol message\nnet/tipc/socket.c-1328- * @tsk: receiving socket\n--\nnet/tipc/socket.c-1332- */\nnet/tipc/socket.c:1333:static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\nnet/tipc/socket.c-1334-\t\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c=2151=static void tipc_sock_destruct(struct sock *sk)\n--\nnet/tipc/socket.c-2155-\nnet/tipc/socket.c:2156:static void tipc_sk_proto_rcv(struct sock *sk,\nnet/tipc/socket.c-2157-\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c-2167-\tcase CONN_MANAGER:\nnet/tipc/socket.c:2168:\t\ttipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq);\nnet/tipc/socket.c-2169-\t\treturn;\n--\nnet/tipc/socket.c-2195-/**\nnet/tipc/socket.c:2196: * tipc_sk_filter_connect - check incoming message for a connection-based socket\nnet/tipc/socket.c-2197- * @tsk: TIPC socket\n--\nnet/tipc/socket.c-2201- */\nnet/tipc/socket.c:2202:static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,\nnet/tipc/socket.c-2203-\t\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c=2346=static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-2363-\tif (unlikely(!msg_isdata(hdr)))\nnet/tipc/socket.c:2364:\t\ttipc_sk_proto_rcv(sk, \u0026inputq, xmitq);\nnet/tipc/socket.c-2365-\n--\nnet/tipc/socket.c-2375-\t\tlimit = rcvbuf_limit(sk, skb);\nnet/tipc/socket.c:2376:\t\tif ((sk_conn \u0026\u0026 !tipc_sk_filter_connect(tsk, skb, xmitq)) ||\nnet/tipc/socket.c-2377-\t\t (!sk_conn \u0026\u0026 msg_connected(hdr)) ||\n--\nnet/tipc/socket.c=2808=static int tipc_shutdown(struct socket *sock, int how)\n--\nnet/tipc/socket.c-2818-\ttrace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c:2819:\t__tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);\nnet/tipc/socket.c-2820-\tsk-\u003esk_shutdown = SHUTDOWN_MASK;\n"
} |
| 7/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5514 output: 37 thoughts: 119 Thoughts: **Analyzing the TIPC Socket Function Call Flow** Okay, so I'm looking at these TIPC functions and how they relate. First, I see that both `tipc_release` and `tipc_shutdown` ultimately call `__tipc_shutdown`, which makes sense. They're likely different entry points to the same underlying shutdown procedure. Now, here's where it gets interesting. `tipc_sk_filter_rcv` seems to be the key function to investigate. It can route to two places. The primary receiver path `tipc_sk_filter_rcv` -> `tipc_sk_proto_rcv` -> `tipc_sk_conn_proto_rcv` looks like the standard path for receiving data. That's a chain of processing within the socket protocol, ultimately handling the incoming packet data. But, `tipc_sk_filter_rcv` can also call `tipc_sk_filter_connect`, so there's another connection path. I need to understand when and why it takes this route. I need to dive deeper into `tipc_sk_filter_rcv` and what's calling it to fully grasp the flow. |
| 8/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_filter_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2318=static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2335-/**\nnet/tipc/socket.c:2336: * tipc_sk_filter_rcv - validate incoming message\nnet/tipc/socket.c-2337- * @sk: socket\n--\nnet/tipc/socket.c-2345- */\nnet/tipc/socket.c:2346:static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\nnet/tipc/socket.c-2347-\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c-2357-\nnet/tipc/socket.c:2358:\ttrace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c-2359-\tTIPC_SKB_CB(skb)-\u003ebytes_read = 0;\n--\nnet/tipc/socket.c=2411=static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2418-\nnet/tipc/socket.c:2419:\ttipc_sk_filter_rcv(sk, skb, \u0026xmitq);\nnet/tipc/socket.c-2420-\tadded = sk_rmem_alloc_get(sk) - before;\n--\nnet/tipc/socket.c=2438=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2456-\t\tif (!sock_owned_by_user(sk)) {\nnet/tipc/socket.c:2457:\t\t\ttipc_sk_filter_rcv(sk, skb, xmitq);\nnet/tipc/socket.c-2458-\t\t\tcontinue;\n"
} |
| 9/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6477 output: 34 thoughts: 89 Thoughts: Okay, let's break this down. **Analyzing Packet Enqueueing in the TIPC Socket Layer** Right, so I'm seeing that `tipc_sk_filter_rcv` is being invoked by two key functions: `tipc_sk_backlog_rcv` and `tipc_sk_enqueue`. That's important. `tipc_sk_backlog_rcv`, as the name suggests, handles the reception of packets that are sitting in the backlog queue for the socket. Makes sense. But `tipc_sk_enqueue` is where things get interesting. I know that function is responsible for actually placing packets onto the socket's receive queue. Now, my focus shifts to understanding exactly *how* and *when* `tipc_sk_enqueue` is called in the first place. I need to trace the callers of `tipc_sk_enqueue`. Understanding these call paths will give me a comprehensive view of how packets get into the receive path and, therefore, which parts of the stack are relying on `tipc_sk_filter_rcv`'s filtering logic. It's a critical point to understand the complete picture of how the data is handled. |
| 10/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_enqueue",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2411=static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2428-/**\nnet/tipc/socket.c:2429: * tipc_sk_enqueue - extract all buffers with destination 'dport' from\nnet/tipc/socket.c-2430- * inputq and try adding them to socket or backlog queue\n--\nnet/tipc/socket.c-2437- */\nnet/tipc/socket.c:2438:static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\nnet/tipc/socket.c-2439-\t\t\t u32 dport, struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c=2492=void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\n--\nnet/tipc/socket.c-2508-\t\t\tif (likely(spin_trylock_bh(\u0026sk-\u003esk_lock.slock))) {\nnet/tipc/socket.c:2509:\t\t\t\ttipc_sk_enqueue(inputq, sk, dport, \u0026xmitq);\nnet/tipc/socket.c-2510-\t\t\t\tspin_unlock_bh(\u0026sk-\u003esk_lock.slock);\n"
} |
| 11/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7226 output: 32 thoughts: 88 Thoughts: Okay, here's my summary, considering my expertise: **Examining TIPC Socket Lifecycle and Receive Path** Alright, let's dive in. My immediate focus is on how TIPC sockets handle incoming data and their overall lifecycle. I understand that `tipc_sk_rcv` is the primary receive function. That's the core of data reception, the workhorse of it all. So, naturally, I want to confirm that. Now, alongside that, I need to understand how the socket is released and shut down. Therefore, I will check the socket operations `tipc_release` and `tipc_shutdown`. These must be closely related to the lifecycle, and potentially impact the receive process. A quick thought... is `tipc_sk_rcv` non-static and exported? If so, this has major implications for how it is used internally versus externally within the TIPC system or even from external modules. I need to verify that this is the case as it changes how it will be called. |
| 12/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_rcv",
"PathPrefix": "net/tipc/"
}Results: {
"Output": "net/tipc/bcast.c=436=int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb)\n--\nnet/tipc/bcast.c-460-\tif (!skb_queue_empty(inputq))\nnet/tipc/bcast.c:461:\t\ttipc_sk_rcv(net, inputq);\nnet/tipc/bcast.c-462-\n--\nnet/tipc/bcast.c=470=void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,\n--\nnet/tipc/bcast.c-490-\tif (!skb_queue_empty(inputq))\nnet/tipc/bcast.c:491:\t\ttipc_sk_rcv(net, inputq);\nnet/tipc/bcast.c-492-}\n--\nnet/tipc/bcast.c=498=int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,\n--\nnet/tipc/bcast.c-532-\tif (!skb_queue_empty(inputq))\nnet/tipc/bcast.c:533:\t\ttipc_sk_rcv(net, inputq);\nnet/tipc/bcast.c-534-\treturn rc;\n--\nnet/tipc/bcast.c=557=void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l)\n--\nnet/tipc/bcast.c-574-\tif (!skb_queue_empty(inputq))\nnet/tipc/bcast.c:575:\t\ttipc_sk_rcv(net, inputq);\nnet/tipc/bcast.c-576-}\n--\nnet/tipc/node.c=1062=static void tipc_node_link_down(struct tipc_node *n, int bearer_id, bool delete)\n--\nnet/tipc/node.c-1093-\t\ttipc_bearer_xmit(n-\u003enet, bearer_id, \u0026xmitq, maddr, n);\nnet/tipc/node.c:1094:\ttipc_sk_rcv(n-\u003enet, \u0026le-\u003einputq);\nnet/tipc/node.c-1095-}\n--\nnet/tipc/node.c=1627=static void tipc_lxc_xmit(struct net *peer_net, struct sk_buff_head *list)\n--\nnet/tipc/node.c-1640-\t\t\tspin_lock_init(\u0026list-\u003elock);\nnet/tipc/node.c:1641:\t\t\ttipc_sk_rcv(peer_net, list);\nnet/tipc/node.c-1642-\t\t\treturn;\n--\nnet/tipc/node.c-1665-\t\tspin_lock_init(\u0026list-\u003elock);\nnet/tipc/node.c:1666:\t\ttipc_sk_rcv(peer_net, list);\nnet/tipc/node.c-1667-\t\treturn;\n--\nnet/tipc/node.c=1687=int tipc_node_xmit(struct net *net, struct sk_buff_head *list,\n--\nnet/tipc/node.c-1700-\t\tspin_lock_init(\u0026list-\u003elock);\nnet/tipc/node.c:1701:\t\ttipc_sk_rcv(net, list);\nnet/tipc/node.c-1702-\t\treturn 0;\n--\nnet/tipc/node.c=2086=void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b)\n--\nnet/tipc/node.c-2202-\tif (!skb_queue_empty(\u0026le-\u003einputq))\nnet/tipc/node.c:2203:\t\ttipc_sk_rcv(net, \u0026le-\u003einputq);\nnet/tipc/node.c-2204-\n--\nnet/tipc/socket.c=1192=void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,\n--\nnet/tipc/socket.c-1265-\t}\nnet/tipc/socket.c:1266:\ttipc_sk_rcv(net, inputq);\nnet/tipc/socket.c-1267-}\n--\nnet/tipc/socket.c=2438=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2485-/**\nnet/tipc/socket.c:2486: * tipc_sk_rcv - handle a chain of incoming buffers\nnet/tipc/socket.c-2487- * @net: the associated network namespace\n--\nnet/tipc/socket.c-2491- */\nnet/tipc/socket.c:2492:void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\nnet/tipc/socket.c-2493-{\n--\nnet/tipc/socket.h=55=void tipc_socket_stop(void);\nnet/tipc/socket.h:56:void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq);\nnet/tipc/socket.h-57-void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,\n--\nnet/tipc/topsrv.c=614=static void tipc_topsrv_kern_evt(struct net *net, struct tipc_event *evt)\n--\nnet/tipc/topsrv.c-629-\ttipc_loopback_trace(net, \u0026evtq);\nnet/tipc/topsrv.c:630:\ttipc_sk_rcv(net, \u0026evtq);\nnet/tipc/topsrv.c-631-}\n"
} |
| 13/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 9133 output: 33 thoughts: 52 Thoughts: **Analyzing TIPC Socket Operations** Okay, so I'm looking at this `tipc_sk_rcv` function, and it's flagged as non-static. Interesting. That suggests it might be called from outside the module it's defined in, or potentially be part of a larger interface. I'll need to keep that in mind as I analyze the codebase. On the other hand, `tipc_release` and `tipc_shutdown` are static socket operations. That implies they are only meant to be accessed internally within the TIPC module, likely for resource management and shutdown procedures specific to TIPC sockets. This is a common pattern for encapsulation. Given this initial observation, I need to get a better understanding of how these functions interact within the TIPC socket layer. I should probably start by reviewing the core socket operations defined in `net/tipc/socket.c` to see how everything is wired together. Time to dive into the code and see what's what. |
| 14/2 | 2026/08/07 10:48 | tool | grepper |
0mArgs:{
"Expression": "proto_ops.*=",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=3342=static int tipc_socketpair(struct socket *sock1, struct socket *sock2)\n--\nnet/tipc/socket.c-3365-\nnet/tipc/socket.c:3366:static const struct proto_ops msg_ops = {\nnet/tipc/socket.c-3367-\t.owner\t\t= THIS_MODULE,\n--\nnet/tipc/socket.c-3385-\nnet/tipc/socket.c:3386:static const struct proto_ops packet_ops = {\nnet/tipc/socket.c-3387-\t.owner\t\t= THIS_MODULE,\n--\nnet/tipc/socket.c-3405-\nnet/tipc/socket.c:3406:static const struct proto_ops stream_ops = {\nnet/tipc/socket.c-3407-\t.owner\t\t= THIS_MODULE,\n"
} |
| 15/2 | 2026/08/07 10:48 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 9676 output: 41 thoughts: 19 Thoughts: Here's my take on those thought processes: **Checking My Operational Arsenal** Okay, time to get down to brass tacks. I need to make sure I'm approaching this problem systematically. First, I'm going to run through my mental checklist. Let's see... I'll start by making sure that my grasp on `msg_ops` is solid. I've got to ensure the message handling fundamentals are in place. Then, I'll move on to `packet_ops` because I need to examine the lower-level data encapsulation and delivery. Finally, and crucially, I'll need to scrutinize `stream_ops`, since streaming behavior can be complex and it's the layer where the rubber meets the road. I'll need to confirm that everything in these areas is as it should be, particularly if there are any subtle interactions I haven't considered. |
| 16/2 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "(msg_ops|packet_ops|stream_ops)",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=161=static int tipc_wait_for_connect(struct socket *sock, long *timeo_p);\nnet/tipc/socket.c-162-\nnet/tipc/socket.c:163:static const struct proto_ops packet_ops;\nnet/tipc/socket.c:164:static const struct proto_ops stream_ops;\nnet/tipc/socket.c:165:static const struct proto_ops msg_ops;\nnet/tipc/socket.c-166-static struct proto tipc_proto;\n--\nnet/tipc/socket.c=460=static int tipc_sk_create(struct net *net, struct socket *sock,\n--\nnet/tipc/socket.c-473-\tcase SOCK_STREAM:\nnet/tipc/socket.c:474:\t\tops = \u0026stream_ops;\nnet/tipc/socket.c-475-\t\tbreak;\nnet/tipc/socket.c-476-\tcase SOCK_SEQPACKET:\nnet/tipc/socket.c:477:\t\tops = \u0026packet_ops;\nnet/tipc/socket.c-478-\t\tbreak;\n--\nnet/tipc/socket.c-480-\tcase SOCK_RDM:\nnet/tipc/socket.c:481:\t\tops = \u0026msg_ops;\nnet/tipc/socket.c-482-\t\tbreak;\n--\nnet/tipc/socket.c=3342=static int tipc_socketpair(struct socket *sock1, struct socket *sock2)\n--\nnet/tipc/socket.c-3365-\nnet/tipc/socket.c:3366:static const struct proto_ops msg_ops = {\nnet/tipc/socket.c-3367-\t.owner\t\t= THIS_MODULE,\n--\nnet/tipc/socket.c-3385-\nnet/tipc/socket.c:3386:static const struct proto_ops packet_ops = {\nnet/tipc/socket.c-3387-\t.owner\t\t= THIS_MODULE,\n--\nnet/tipc/socket.c-3405-\nnet/tipc/socket.c:3406:static const struct proto_ops stream_ops = {\nnet/tipc/socket.c-3407-\t.owner\t\t= THIS_MODULE,\n"
} |
| 17/2 | 2026/08/07 10:49 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 10538 output: 33 thoughts: 59 Thoughts: **Analyzing the TIPC Socket Operations** Okay, so I'm diving into this TIPC socket creation process, and it looks like the socket operations themselves are being assigned during `tipc_sk_create`. That makes sense; it's the point of instantiation, so it's where the function pointers for receiving and sending would be defined. Now, the key symbols I need to focus on to understand the data flow are likely going to be related to the core operations. I'm thinking either `tipc_sk_rcv` for the receive path, or `tipc_node_xmit` for the node-level transmission path. Potentially, also, `tipc_sendmsg`. Let's start by looking closely at `tipc_sendmsg` to see how it handles the outbound message construction and transmission. |
| 18/2 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_sendmsg",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=157=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);\nnet/tipc/socket.c:158:static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);\nnet/tipc/socket.c-159-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c=791=static __poll_t tipc_poll(struct file *file, struct socket *sock,\n--\nnet/tipc/socket.c-839- *\nnet/tipc/socket.c:840: * Called from function tipc_sendmsg(), which has done all sanity checks\nnet/tipc/socket.c-841- * Return: the number of bytes sent on success, or errno\n--\nnet/tipc/socket.c=906=static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk,\n--\nnet/tipc/socket.c-953- *\nnet/tipc/socket.c:954: * Called from function tipc_sendmsg(), which has done all sanity checks\nnet/tipc/socket.c-955- * Return: the number of bytes sent on success, or errno\n--\nnet/tipc/socket.c=957=static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m,\n--\nnet/tipc/socket.c-997- *\nnet/tipc/socket.c:998: * Called from function tipc_sendmsg(), which has done all sanity checks\nnet/tipc/socket.c-999- * Return: the number of bytes sent on success, or errno\n--\nnet/tipc/socket.c=1001=static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,\n--\nnet/tipc/socket.c-1078- *\nnet/tipc/socket.c:1079: * Called from function tipc_sendmsg(), which has done all sanity checks\nnet/tipc/socket.c-1080- * Return: the number of bytes sent on success, or errno\n--\nnet/tipc/socket.c=1082=static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m,\n--\nnet/tipc/socket.c-1152- *\nnet/tipc/socket.c:1153: * Called from function tipc_sendmsg(), which has done all sanity checks\nnet/tipc/socket.c-1154- * Return: the number of bytes sent on success, or errno\n--\nnet/tipc/socket.c=1333=static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-1391-/**\nnet/tipc/socket.c:1392: * tipc_sendmsg - send message in connectionless manner\nnet/tipc/socket.c-1393- * @sock: socket structure\n--\nnet/tipc/socket.c-1403- */\nnet/tipc/socket.c:1404:static int tipc_sendmsg(struct socket *sock,\nnet/tipc/socket.c-1405-\t\t\tstruct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1410-\tlock_sock(sk);\nnet/tipc/socket.c:1411:\tret = __tipc_sendmsg(sock, m, dsz);\nnet/tipc/socket.c-1412-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1416-\nnet/tipc/socket.c:1417:static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1418-{\n--\nnet/tipc/socket.c=1564=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1584-\tif (unlikely(dest \u0026\u0026 sk-\u003esk_state == TIPC_OPEN)) {\nnet/tipc/socket.c:1585:\t\trc = __tipc_sendmsg(sock, m, dlen);\nnet/tipc/socket.c-1586-\t\tif (dlen \u0026\u0026 dlen == rc) {\n--\nnet/tipc/socket.c=2582=static int tipc_connect(struct socket *sock, struct sockaddr_unsized *dest,\n--\nnet/tipc/socket.c-2636-\nnet/tipc/socket.c:2637:\t\tres = __tipc_sendmsg(sock, \u0026m, 0);\nnet/tipc/socket.c-2638-\t\tif ((res \u003c 0) \u0026\u0026 (res != -EWOULDBLOCK))\n--\nnet/tipc/socket.c=3366=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3380-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3381:\t.sendmsg\t= tipc_sendmsg,\nnet/tipc/socket.c-3382-\t.recvmsg\t= tipc_recvmsg,\n"
} |
| 19/2 | 2026/08/07 10:49 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12229 output: 33 thoughts: 76 Thoughts: Okay, let's break this down. **Focusing on TIPC Communication Primitives** Right, so for the sending side of things, `tipc_sendmsg` and `tipc_sendstream` are the key areas to concentrate on. They're the core functions involved in putting data *out* via TIPC. Then, when we're concerned with reception, `tipc_sk_rcv` is the symbol to center on. That seems pretty straightforward, covers the two major aspects of the operation. Now, that `tipc_sk_push_backlog` looks promising, but it's *static*. Meaning I'm not going to be able to use it directly, so I'll need to go another way, and let's start with `tipc_sendstream`. |
| 20/2 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_sendstream",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=156=static void tipc_sk_remove(struct tipc_sock *tsk);\nnet/tipc/socket.c:157:static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);\nnet/tipc/socket.c-158-static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);\n--\nnet/tipc/socket.c=1417=static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1541-/**\nnet/tipc/socket.c:1542: * tipc_sendstream - send stream-oriented data\nnet/tipc/socket.c-1543- * @sock: socket structure\n--\nnet/tipc/socket.c-1551- */\nnet/tipc/socket.c:1552:static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)\nnet/tipc/socket.c-1553-{\n--\nnet/tipc/socket.c-1557-\tlock_sock(sk);\nnet/tipc/socket.c:1558:\tret = __tipc_sendstream(sock, m, dsz);\nnet/tipc/socket.c-1559-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1563-\nnet/tipc/socket.c:1564:static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1565-{\n--\nnet/tipc/socket.c=1659=static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1663-\nnet/tipc/socket.c:1664:\treturn tipc_sendstream(sock, m, dsz);\nnet/tipc/socket.c-1665-}\n--\nnet/tipc/socket.c=2728=static int tipc_accept(struct socket *sock, struct socket *new_sock,\n--\nnet/tipc/socket.c-2791-\tiov_iter_kvec(\u0026m.msg_iter, ITER_SOURCE, NULL, 0, 0);\nnet/tipc/socket.c:2792:\t__tipc_sendstream(new_sock, \u0026m, 0);\nnet/tipc/socket.c-2793-\trelease_sock(new_sk);\n--\nnet/tipc/socket.c=3406=static const struct proto_ops stream_ops = {\n--\nnet/tipc/socket.c-3420-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3421:\t.sendmsg\t= tipc_sendstream,\nnet/tipc/socket.c-3422-\t.recvmsg\t= tipc_recvstream,\n"
} |
| 21/2 | 2026/08/07 10:49 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13329 output: 32 thoughts: 148 Thoughts: **My Analysis of TIPC Send Functions** Okay, so I'm looking at `tipc_sendstream` and `tipc_sendmsg`. Something struck me - are these static functions? I need to verify that. Let's quickly review their definitions: `static int tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz)` and `static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)`. Yep, they're definitely static. Now that I've confirmed that, it means they aren't part of the public API, right? They're internal to the TIPC implementation and are likely assigned to the `proto_ops` structure. Thus, they're not exported symbols. That's good to know for understanding how they're intended to be used. I now need to consider how the receiver side is set up. Next I should check `tipc_sk_rcv` - that's definitely exported, isn't it? And, what about `tipc_node_xmit`? That's likely exported. This gives me a clearer picture of the communication flow and the public interfaces exposed by TIPC. |
| 22/2 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_node_xmit",
"PathPrefix": "net/tipc/"
}Results: {
"Output": "net/tipc/bcast.c=288=static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts,\n--\nnet/tipc/bcast.c-303-\t\t/* Any other return value than -ELINKCONG is ignored */\nnet/tipc/bcast.c:304:\t\tif (tipc_node_xmit(net, \u0026_pkts, dnode, selector) == -ELINKCONG)\nnet/tipc/bcast.c-305-\t\t\t(*cong_link_cnt)++;\n--\nnet/tipc/crypto.c=2238=static int tipc_crypto_key_xmit(struct net *net, struct tipc_aead_key *skey,\n--\nnet/tipc/crypto.c-2268-\tif (dnode)\nnet/tipc/crypto.c:2269:\t\trc = tipc_node_xmit(net, \u0026pkts, dnode, 0);\nnet/tipc/crypto.c-2270-\telse\n--\nnet/tipc/name_distr.c=206=void tipc_named_node_up(struct net *net, u32 dnode, u16 capabilities)\n--\nnet/tipc/name_distr.c-221-\tnamed_distribute(net, \u0026head, dnode, \u0026nt-\u003ecluster_scope, seqno);\nnet/tipc/name_distr.c:222:\ttipc_node_xmit(net, \u0026head, dnode, 0);\nnet/tipc/name_distr.c-223-\tread_unlock_bh(\u0026nt-\u003ecluster_scope_lock);\n--\nnet/tipc/node.c=1627=static void tipc_lxc_xmit(struct net *peer_net, struct sk_buff_head *list)\n--\nnet/tipc/node.c-1678-/**\nnet/tipc/node.c:1679: * tipc_node_xmit() - general link level function for message sending\nnet/tipc/node.c-1680- * @net: the applicable net namespace\n--\nnet/tipc/node.c-1686- */\nnet/tipc/node.c:1687:int tipc_node_xmit(struct net *net, struct sk_buff_head *list,\nnet/tipc/node.c-1688-\t\t u32 dnode, int selector)\n--\nnet/tipc/node.c-1752-\nnet/tipc/node.c:1753:/* tipc_node_xmit_skb(): send single buffer to destination\nnet/tipc/node.c-1754- * Buffers sent via this function are generally TIPC_SYSTEM_IMPORTANCE\n--\nnet/tipc/node.c-1758- */\nnet/tipc/node.c:1759:int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode,\nnet/tipc/node.c-1760-\t\t u32 selector)\n--\nnet/tipc/node.c-1765-\t__skb_queue_tail(\u0026head, skb);\nnet/tipc/node.c:1766:\ttipc_node_xmit(net, \u0026head, dnode, selector);\nnet/tipc/node.c-1767-\treturn 0;\n--\nnet/tipc/node.c=1773=int tipc_node_distr_xmit(struct net *net, struct sk_buff_head *xmitq)\n--\nnet/tipc/node.c-1780-\t\tdnode = msg_destnode(buf_msg(skb));\nnet/tipc/node.c:1781:\t\ttipc_node_xmit_skb(net, skb, dnode, selector);\nnet/tipc/node.c-1782-\t}\n--\nnet/tipc/node.c=1786=void tipc_node_broadcast(struct net *net, struct sk_buff *skb, int rc_dests)\n--\nnet/tipc/node.c-1813-\t\tmsg_set_destnode(buf_msg(txskb), dst);\nnet/tipc/node.c:1814:\t\ttipc_node_xmit_skb(net, txskb, dst, 0);\nnet/tipc/node.c-1815-\t}\n--\nnet/tipc/node.h=99=int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 node,\nnet/tipc/node.h-100-\t\t\t char *linkname, size_t len);\nnet/tipc/node.h:101:int tipc_node_xmit(struct net *net, struct sk_buff_head *list, u32 dnode,\nnet/tipc/node.h-102-\t\t int selector);\nnet/tipc/node.h=103=int tipc_node_distr_xmit(struct net *net, struct sk_buff_head *list);\nnet/tipc/node.h:104:int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,\nnet/tipc/node.h-105-\t\t u32 selector);\n--\nnet/tipc/socket.c=286=static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)\n--\nnet/tipc/socket.c-297-\tselector = msg_origport(buf_msg(skb));\nnet/tipc/socket.c:298:\ttipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);\nnet/tipc/socket.c-299-}\n--\nnet/tipc/socket.c=550=static void __tipc_shutdown(struct socket *sock, int error)\n--\nnet/tipc/socket.c-597-\t\tif (skb)\nnet/tipc/socket.c:598:\t\t\ttipc_node_xmit_skb(net, skb, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-599-\t\tbreak;\n--\nnet/tipc/socket.c=906=static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk,\n--\nnet/tipc/socket.c-931-\t/* Send message */\nnet/tipc/socket.c:932:\trc = tipc_node_xmit(net, \u0026pkts, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-933-\tif (unlikely(rc == -ELINKCONG)) {\n--\nnet/tipc/socket.c=1272=static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c-1320-\nnet/tipc/socket.c:1321:\trc = tipc_node_xmit(net, txq, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-1322-\tif (rc == -ELINKCONG)\n--\nnet/tipc/socket.c=1417=static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1522-\ttrace_tipc_sk_sendmsg(sk, skb_peek(\u0026pkts), TIPC_DUMP_SK_SNDQ, \" \");\nnet/tipc/socket.c:1523:\trc = tipc_node_xmit(net, \u0026pkts, skaddr.node, tsk-\u003eportid);\nnet/tipc/socket.c-1524-\tif (unlikely(rc == -ELINKCONG)) {\n--\nnet/tipc/socket.c=1564=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1633-\t\t\t\t\t TIPC_DUMP_SK_SNDQ, \" \");\nnet/tipc/socket.c:1634:\t\trc = tipc_node_xmit(net, txq, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-1635-\t\tif (unlikely(rc == -ELINKCONG)) {\n--\nnet/tipc/socket.c=1828=static void tipc_sk_send_ack(struct tipc_sock *tsk)\n--\nnet/tipc/socket.c-1835-\nnet/tipc/socket.c:1836:\ttipc_node_xmit_skb(sock_net(\u0026tsk-\u003esk), skb, tsk_peer_node(tsk),\nnet/tipc/socket.c-1837-\t\t\t msg_link_selector(buf_msg(skb)));\n--\nnet/tipc/socket.c=2492=void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\n--\nnet/tipc/socket.c-2533-\t\tdnode = msg_destnode(buf_msg(skb));\nnet/tipc/socket.c:2534:\t\ttipc_node_xmit_skb(net, skb, dnode, dport);\nnet/tipc/socket.c-2535-\t}\n--\nnet/tipc/socket.c=2877=static void tipc_sk_timeout(struct timer_list *t)\n--\nnet/tipc/socket.c-2903-\tif (!skb_queue_empty(\u0026list))\nnet/tipc/socket.c:2904:\t\trc = tipc_node_xmit(sock_net(sk), \u0026list, pnode, tsk-\u003eportid);\nnet/tipc/socket.c-2905-\n"
} |
| 23/2 | 2026/08/07 10:49 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 16350 output: 36 thoughts: 818 Thoughts: **Analyzing the TIPC Patch for Fuzzing Focus** Okay, let's break this down for fuzzing purposes. My initial assessment is that `tipc_node_xmit` and `tipc_node_xmit_skb` seem like potential entry points, but `tipc_sk_rcv` is also exported, which is immediately intriguing. My focus here is on identifying key functions that are involved in the patch, and exposed for fuzzing. I was initially considering `tipc_sendmsg` and `tipc_sendstream` as good candidates since these are user-space entry points. I then realized they're static. A quick check confirmed that they are not inlined. This makes them good focus symbols. They are assigned to `proto_ops` in `net/tipc/socket.c`, so I'm confident they are not inlined. However, the real change is in `tipc_sk_push_backlog`. It looks like this function is where the modification lies. It's called from several places: `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, `tipc_sk_filter_connect`, and `__tipc_shutdown`. Critically, all these callers are on the receive path or shutdown path. This suggests that while `tipc_sendmsg` and `tipc_sendstream` are for the send path. `tipc_sk_rcv` is the main entry point for the receive path. The core of the patch is about how the transmit queue is handled in local communication, specifically when the destination is the same node. It optimizes local communication. The change involves `xmitq`, which is then processed by the caller in the receiving path. This is a functional change related to how packets are queued and transmitted locally, making it a prime target for fuzzing. My list of focus symbols has been refined to: * `tipc_sk_rcv` (primary) * `tipc_sendstream` While `tipc_sendmsg` is static, it's assigned to `proto_ops` which means it's not inlined and hence a good focus symbol. Let me double check the callers of `tipc_sk_push_backlog` to be sure. I can confirm, `__tipc_shutdown` calls it with `xmitq = NULL`, and the others call it with an `xmitq`. So, to summarize, the receive path is my main focus, particularly `tipc_sk_rcv`. Since `tipc_sendstream` is involved, I should use that as well, since that's where the backlog generation is triggered. I'll need to check the function, to ensure that this is the best path to reach the modified code. Specifically, the relationship between `tipc_sendstream` and `tipc_sk_push_backlog` is important to confirm. `tipc_sendstream` queues packets. `tipc_sk_push_backlog` is called when an ACK is received or when the socket is shut down. Therefore, `tipc_sk_rcv` becomes the main focus symbol. Additionally, `tipc_sendstream` is also a good symbol to generate backlog. I will now examine `tipc_sk_rcv` in `net/tipc/socket.c` to fully understand the flow. |
| 24/2 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "void tipc_sk_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2438=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2491- */\nnet/tipc/socket.c:2492:void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\nnet/tipc/socket.c-2493-{\n"
} |
| 25/2 | 2026/08/07 10:49 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18067 output: 121 thoughts: 625 Thoughts: **My Analysis of the TIPC Patch** Okay, let's break this down. First, I see that `tipc_sk_rcv` is non-static – that's a key function we should be paying attention to. `tipc_sendstream` and `tipc_sendmsg` are both static but *not* inlined, which makes them relevant, but perhaps less critical than `tipc_sk_rcv`. Although `tipc_release` and `tipc_shutdown` are also static and non-inlined, I'm going to set them aside for now, since they appear to be standard socket operations. So, I will focus on `tipc_sk_rcv`, and `tipc_sendstream`, and consider `tipc_sendmsg`. I should check the `TIPC` config again. It's tristate. So, `TIPC` is the main thing to worry about config-wise. Now, looking at the patch itself... Ah, here we go. The key change is within the `tipc_sk_push_backlog` function. It's essentially optimizing how packets are handled when destined for the local node. If an `xmitq` is provided and the destination is local, the code now *splices* the transmit queue to the `xmitq` directly. This avoids a call to `tipc_node_xmit` in that scenario. From a networking perspective, this is a distinct functional change in how TIPC handles the socket backlog. So, how can we trigger this? I can create a TIPC socket, send some data to a local node (which will queue it if Nagle is on or the link is congested), and then trigger an ACK or shut down the socket. This will give me good coverage. Therefore, for fuzzing, I'm going to mark this as "WorthFuzzing" and the "FocusSymbols" should be `tipc_sk_rcv`, `tipc_sendstream`, and `tipc_sendmsg`. I will also "EnableConfigs" for `TIPC`. The core "Reasoning" is that the patch alters the backlog processing, splicing the transmit queue directly to `xmitq` for local destinations, avoiding `tipc_node_xmit`, and this is reachable from user space via the AF_TIPC socket API. |
| 26/2 | 2026/08/07 10:49 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_sendstream",
"tipc_sendmsg"
],
"Reasoning": "The patch modifies the TIPC socket backlog processing to splice the transmit queue directly to the provided xmitq for local destinations, avoiding a call to tipc_node_xmit. This is a functional change in the TIPC networking subsystem reachable from user space via the AF_TIPC socket API.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_sendstream",
"tipc_sendmsg"
],
"Reasoning": "The patch modifies the TIPC socket backlog processing to splice the transmit queue directly to the provided xmitq for local destinations, avoiding a call to tipc_node_xmit. This is a functional change in the TIPC networking subsystem reachable from user space via the AF_TIPC socket API.",
"WorthFuzzing": true
} |
| 27/1 | 2026/08/07 10:49 | action | If |
0mArgs:{
"WorthFuzzing": true
}Results: null |
| 28/2 | 2026/08/07 10:49 | agent | kmsan-evaluator |
0mModel:best-expensive Args: null Results: {
"KMSANReasoning": "The patch modifies `tipc_sk_push_backlog` to optionally splice the socket's write queue into a provided `xmitq` instead of transmitting the buffers directly via `tipc_node_xmit` when the destination is the local node. This is a logic change related to queue management and packet transmission flow. It does not introduce any new allocations, structure fields, or user-space copies that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free, double free, or out-of-bounds accesses on the skb queues) would be reliably caught by standard KASAN and other default bug detectors. Therefore, a dedicated KMSAN fuzzing session is not required.",
"NeedsKMSAN": false
}Instruction: You are an expert Linux kernel security engineer specializing in kernel memory
error detectors (KASAN and KMSAN). Your job is to review the provided patch series and
determine if the code changes justify spawning a dedicated KMSAN (KernelMemorySanitizer)
fuzzing session in addition to standard KASAN fuzzing.
CRITICAL DISTINCTION BETWEEN KASAN AND KMSAN:
- Standard KASAN kernel builds (upstream-apparmor-kasan.config) already enable
a comprehensive suite of debugging tools and sanitizers, including KASAN
(out-of-bounds accesses, use-after-free, double free, invalid free), LOCKDEP
(locking bugs and deadlocks), UB-sanitizers, and memory corruption checks.
- KMSAN (KernelMemorySanitizer) detects reads of UNINITIALIZED memory (stack, heap,
or page allocations) and kernel-to-user memory info-leaks.
Rule: THERE IS NO SENSE IN RUNNING A KMSAN SESSION IF A BUG CAN BE CAUGHT BY KASAN,
LOCKDEP, OR OTHER STANDARD BUG DETECTORS.
A dedicated KMSAN fuzzing session incurs significant resource costs. You must ONLY
set NeedsKMSAN=true if the code changes introduce or expose UNINITIALIZED MEMORY risks
that are detected ONLY by KMSAN.
Look holistically at the patch series and surrounding code. Even if no direct
uninitialized field accesses or new buffer allocations are added in the diff itself,
a patch may alter control flow, bounds checking, or data length calculations in ways
that change how the rest of the code operates on existing buffers (e.g. allowing
uninitialized stack/heap memory to be read, copied to user space, or used in control
flow). Do not hesitate to use your code access tools to inspect the surrounding code,
called functions, and callers.
Set NeedsKMSAN=true ONLY IF the patch introduces or modifies:
1. Kernel structures sent to user space (via copy_to_user, put_user, netlink skb
attributes, ioctl output arguments, socket options, or BPF buffers) where fields
or structure padding might not be fully initialized/zeroed.
2. Conditional logic or branching that depends on potentially uninitialized variables
or struct fields.
3. Allocation or initialization of complex data structures where uninitialized fields
could be read later in reachable code paths.
4. Bounds checks, lengths, or logic in a way that allows surrounding code to access
uninitialized bytes of existing buffers.
Set NeedsKMSAN=false IF:
- The code changes primarily risk out-of-bounds access, array overflows, NULL pointer
dereferences, locking deadlocks, or use-after-free bugs (these are already caught
by KASAN, LOCKDEP, or standard bug detectors).
- All stack/heap structures touched or introduced by the patch are fully zeroed
or initialized (e.g. using = {0}, memset, kzalloc) before being read or copied.
- The patch does not introduce any risk of uninitialized memory usage or info-leaks.
Use your code access tools to inspect the surrounding code if necessary, then provide
detailed KMSANReasoning contrasting KASAN vs KMSAN applicability for this patch.
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.
Prompt: For your convenience, here is the diff of the changes:
commit 6a3d8628a0887c8f7056cf2403b326b175f1946b
Author: syz-cluster <triage@syzkaller.com>
Date: Fri Aug 7 10:48:16 2026 +0000
syz-cluster: applied patch under review
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e564341e0216d..16d844fc8ca57 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -156,7 +156,8 @@ static int tipc_sk_insert(struct tipc_sock *tsk);
static void tipc_sk_remove(struct tipc_sock *tsk);
static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack);
+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,
+ struct sk_buff_head *xmitq);
static int tipc_wait_for_connect(struct socket *sock, long *timeo_p);
static const struct proto_ops packet_ops;
@@ -560,7 +561,7 @@ static void __tipc_shutdown(struct socket *sock, int error)
!tsk_conn_cong(tsk)));
/* Push out delayed messages if in Nagle mode */
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, NULL);
/* Remove pending SYN */
__skb_queue_purge(&sk->sk_write_queue);
@@ -1268,7 +1269,8 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
/* tipc_sk_push_backlog(): send accumulated buffers in socket write queue
* when socket is in Nagle mode
*/
-static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)
+static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,
+ struct sk_buff_head *xmitq)
{
struct sk_buff_head *txq = &tsk->sk.sk_write_queue;
struct sk_buff *skb = skb_peek_tail(txq);
@@ -1310,6 +1312,12 @@ static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)
tsk->pkt_cnt += skb_queue_len(txq);
tsk->snt_unacked += tsk->snd_backlog;
tsk->snd_backlog = 0;
+
+ if (xmitq && in_own_node(net, dnode)) {
+ skb_queue_splice_tail_init(txq, xmitq);
+ return;
+ }
+
rc = tipc_node_xmit(net, txq, dnode, tsk->portid);
if (rc == -ELINKCONG)
tsk->cong_link_cnt = 1;
@@ -1367,7 +1375,7 @@ static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
goto exit;
was_cong = tsk_conn_cong(tsk);
- tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr));
+ tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr), xmitq);
tsk->snt_unacked -= msg_conn_ack(hdr);
if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
tsk->snd_win = msg_adv_win(hdr);
@@ -2165,7 +2173,7 @@ static void tipc_sk_proto_rcv(struct sock *sk,
smp_wmb();
tsk->cong_link_cnt--;
wakeup = true;
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, xmitq);
break;
case GROUP_PROTOCOL:
tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq);
@@ -2256,7 +2264,7 @@ static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,
return false;
case TIPC_ESTABLISHED:
if (!skb_queue_empty(&sk->sk_write_queue))
- tipc_sk_push_backlog(tsk, false);
+ tipc_sk_push_backlog(tsk, false, xmitq);
/* Accept only connection-based messages sent by peer */
if (likely(con_msg && !err && pport == oport &&
pnode == onode)) {
|
| 29/3 | 2026/08/07 10:49 | llm | kmsan-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3076 output: 39 thoughts: 537 Thoughts: **Analyzing the TIPC Socket Modification** Okay, so this patch is tweaking `tipc_sk_push_backlog` in `net/tipc/socket.c`. The core change is the addition of `struct sk_buff_head *xmitq` as an argument. I see it's conditionally queueing SKBs to `xmitq` *instead* of immediately transmitting them with `tipc_node_xmit` when the destination is the local node. That's interesting, essentially deferring the transmission for local traffic. The code seems straightforward enough. It’s a logic change, essentially a queue management refactor. No new allocations, no new struct members, and no apparent uninitialized reads. It's just moving SKBs around, so the typical bugs I’d be worried about here are use-after-free, double-frees, or out-of-bounds accesses. Thankfully, KASAN should be well-equipped to catch those. There's no obvious vector for leaking uninitialized memory to user space or using it in a branching condition. I am confident that there are no such issues because there are no new allocations. I should double-check about the initialization of `xmitq`. I see it's passed down from callers like `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, and `tipc_sk_filter_connect`. These functions receive `xmitq` as an argument, so its use is consistent throughout. Now, `tipc_sk_rcv`, is a likely initialization site, and I should make sure there is no issue with it. Honestly, even if `xmitq` were uninitialized, it's just a pointer, and its usage would be a classic uninitialized pointer bug that KMSAN should catch. However, I should check, for completeness. |
| 30/3 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_conn_proto_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=1272=static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c-1326-/**\nnet/tipc/socket.c:1327: * tipc_sk_conn_proto_rcv - receive a connection mng protocol message\nnet/tipc/socket.c-1328- * @tsk: receiving socket\n--\nnet/tipc/socket.c-1332- */\nnet/tipc/socket.c:1333:static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\nnet/tipc/socket.c-1334-\t\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c=2156=static void tipc_sk_proto_rcv(struct sock *sk,\n--\nnet/tipc/socket.c-2167-\tcase CONN_MANAGER:\nnet/tipc/socket.c:2168:\t\ttipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq);\nnet/tipc/socket.c-2169-\t\treturn;\n"
} |
| 31/3 | 2026/08/07 10:49 | llm | kmsan-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 4383 output: 37 thoughts: 17 Thoughts: Here's my thought process, summarized as you requested: **Investigating the Callers of `tipc_sk_proto_rcv`** Okay, time to dig in. I'm going to start by examining the callers of `tipc_sk_proto_rcv`. This function is critical within the TIPC (Transparent Inter-Process Communication) framework, so understanding who's calling it is essential to trace the data flow and understand the different paths that data can take. This likely involves some investigation of the kernel's source code, possibly using tools like `cscope`, `gdb`, or simply a grep search across the relevant files. I'm aiming to identify the immediate functions calling `tipc_sk_proto_rcv`, and from there, I can analyze the wider context within the TIPC subsystem. The goal is to get a handle on what triggered the investigation, and to determine if there are any obvious connections to known areas of interest or potential problem points, or maybe just to map out the call paths. |
| 32/3 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_proto_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=403=static int tipc_sk_sock_err(struct socket *sock, long *timeout)\n--\nnet/tipc/socket.c-431-\twhile ((rc_ = !(condition_))) {\t\t\t\t\t \\\nnet/tipc/socket.c:432:\t\t/* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \\\nnet/tipc/socket.c-433-\t\tsmp_rmb(); \\\n--\nnet/tipc/socket.c=2151=static void tipc_sock_destruct(struct sock *sk)\n--\nnet/tipc/socket.c-2155-\nnet/tipc/socket.c:2156:static void tipc_sk_proto_rcv(struct sock *sk,\nnet/tipc/socket.c-2157-\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c=2346=static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-2363-\tif (unlikely(!msg_isdata(hdr)))\nnet/tipc/socket.c:2364:\t\ttipc_sk_proto_rcv(sk, \u0026inputq, xmitq);\nnet/tipc/socket.c-2365-\n"
} |
| 33/3 | 2026/08/07 10:49 | llm | kmsan-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5024 output: 37 thoughts: 17 Thoughts: Here's my take on those thoughts: **Analyzing the `tipc_sk_filter_rcv` Callers** Okay, so I need to dig into the `tipc_sk_filter_rcv` callers. I'm thinking about the implications here. This function is a key piece in the Tipc socket filtering process, and understanding who's calling it is crucial for a complete overview. I need to be able to trace how messages are getting handled, and identify potential areas for optimization, or even potential vulnerabilities. Time to start the deep dive into those call stacks and see what's happening. I'll need to keep an eye out for any unexpected or inefficient usage patterns. |
| 34/3 | 2026/08/07 10:49 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_filter_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2318=static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2335-/**\nnet/tipc/socket.c:2336: * tipc_sk_filter_rcv - validate incoming message\nnet/tipc/socket.c-2337- * @sk: socket\n--\nnet/tipc/socket.c-2345- */\nnet/tipc/socket.c:2346:static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\nnet/tipc/socket.c-2347-\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c-2357-\nnet/tipc/socket.c:2358:\ttrace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c-2359-\tTIPC_SKB_CB(skb)-\u003ebytes_read = 0;\n--\nnet/tipc/socket.c=2411=static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2418-\nnet/tipc/socket.c:2419:\ttipc_sk_filter_rcv(sk, skb, \u0026xmitq);\nnet/tipc/socket.c-2420-\tadded = sk_rmem_alloc_get(sk) - before;\n--\nnet/tipc/socket.c=2438=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2456-\t\tif (!sock_owned_by_user(sk)) {\nnet/tipc/socket.c:2457:\t\t\ttipc_sk_filter_rcv(sk, skb, xmitq);\nnet/tipc/socket.c-2458-\t\t\tcontinue;\n"
} |
| 35/3 | 2026/08/07 10:49 | llm | kmsan-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5774 output: 178 thoughts: 247 Thoughts: **Analyzing the `tipc_sk_backlog_rcv` Function** Okay, let's break this down. I'm looking at `tipc_sk_backlog_rcv` and specifically how this patch impacts it. The key here is that `xmitq` is initialized correctly using `__skb_queue_head_init`. No worries there. The core of this patch seems to be about optimizing how SKBs are sent when the destination is the local node. Instead of the direct call to `tipc_node_xmit`, it's now splicing to `xmitq`. This is classic; this is all about avoiding potential locking problems or reentrancy issues by batching the transmissions, or possibly improving performance with some kind of local optimization. From a memory perspective, there's absolutely no risk of introducing uninitialized memory bugs with this change. The patch is manipulating queue management, which KASAN, with its superb coverage, will handle perfectly. Any potential issues would manifest as use-after-free or double-free scenarios, which KASAN is built to catch. Therefore, I'm confident we can set `NeedsKMSAN=false` for this. This isn't a KMSAN-relevant change. |
| 36/3 | 2026/08/07 10:50 | tool | set-results |
0mArgs:{
"KMSANReasoning": "The patch modifies `tipc_sk_push_backlog` to optionally splice the socket's write queue into a provided `xmitq` instead of transmitting the buffers directly via `tipc_node_xmit` when the destination is the local node. This is a logic change related to queue management and packet transmission flow. It does not introduce any new allocations, structure fields, or user-space copies that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free, double free, or out-of-bounds accesses on the skb queues) would be reliably caught by standard KASAN and other default bug detectors. Therefore, a dedicated KMSAN fuzzing session is not required.",
"NeedsKMSAN": false
}Results: {
"KMSANReasoning": "The patch modifies `tipc_sk_push_backlog` to optionally splice the socket's write queue into a provided `xmitq` instead of transmitting the buffers directly via `tipc_node_xmit` when the destination is the local node. This is a logic change related to queue management and packet transmission flow. It does not introduce any new allocations, structure fields, or user-space copies that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free, double free, or out-of-bounds accesses on the skb queues) would be reliably caught by standard KASAN and other default bug detectors. Therefore, a dedicated KMSAN fuzzing session is not required.",
"NeedsKMSAN": false
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|