| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/08/07 17:02 | flow | patch-triage |
2mArgs:null Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_release",
"tipc_shutdown"
],
"KMSANReasoning": "The patch modifies the `tipc_sk_push_backlog` function to accept an additional `xmitq` argument. Instead of immediately transmitting packets via `tipc_node_xmit`, it splices the socket's write queue into the provided `xmitq` if the destination is the local node. This is a control flow and queue management change, likely intended to fix a locking issue, deadlock, or recursion problem during packet reception. It does not introduce any new allocations, modify data structures sent to user space, or alter bounds checking in a way that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free or deadlocks) would be caught by standard KASAN or LOCKDEP. Therefore, a dedicated KMSAN fuzzing session is not necessary.",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies `tipc_sk_push_backlog` to splice the transmit queue to the receive output queue if the destination is the own node. This is a functional change in the TIPC protocol implementation, which is reachable from userspace via TIPC sockets.",
"WorthFuzzing": true
} |
| 1/1 | 2026/08/07 17:02 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 6fdf48ab20c84a43a77f6e035663fcefa1280e09\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Fri Aug 7 17:02:22 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..33d744dc514f5 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@@ -1267,8 +1268,10 @@ void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,\n \n /* tipc_sk_push_backlog(): send accumulated buffers in socket write queue\n * when socket is in Nagle mode\n+ * @xmitq: receive output queue, or NULL outside receive context\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 +1313,12 @@ 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 +1376,7 @@ 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 +2174,7 @@ 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 +2265,7 @@ 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 17:02 | agent | patch-evaluator |
2mModel:best-expensive Args: null Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_release",
"tipc_shutdown"
],
"Reasoning": "The patch modifies `tipc_sk_push_backlog` to splice the transmit queue to the receive output queue if the destination is the own node. This is a functional change in the TIPC protocol implementation, which is reachable from userspace via TIPC sockets.",
"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 6fdf48ab20c84a43a77f6e035663fcefa1280e09
Author: syz-cluster <triage@syzkaller.com>
Date: Fri Aug 7 17:02:22 2026 +0000
syz-cluster: applied patch under review
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e564341e0216d..33d744dc514f5 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);
@@ -1267,8 +1268,10 @@ 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
+ * @xmitq: receive output queue, or NULL outside receive context
*/
-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 +1313,12 @@ 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 +1376,7 @@ 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 +2174,7 @@ 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 +2265,7 @@ 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 17:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3097 output: 31 thoughts: 252 Thoughts: **Analyzing a TIPC Protocol Patch** Okay, so I'm looking at a patch that tweaks `net/tipc/socket.c`, specifically the `tipc_sk_push_backlog` function. It looks like they've added a new argument, `struct sk_buff_head *xmitq`, which is a pretty clear indicator of a change to the way data is handled within the TIPC protocol. This new argument means the function can now splice `txq` into `xmitq` under certain conditions – specifically, when `xmitq` is provided and the destination is the local node. That's a definite functional change to TIPC, no doubt. Now, I need to get a better handle on the implications. I should check where `tipc_sk_push_backlog` is called from. Let me see... It's called by `__tipc_shutdown`, `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, and `tipc_sk_filter_connect`. That gives me a decent overview of the areas this change touches. Given that TIPC is a network protocol, and thus potentially accessible in virtualized environments, I'm already thinking about fuzzing it. This kind of change is exactly the type of thing that could introduce subtle bugs or vulnerabilities, so fuzzing is probably a good move. Next step: let me use `grepper` to quickly track down the relevant config options for TIPC. I'll search for `config TIPC` and get a list. |
| 4/2 | 2026/08/07 17:02 | tool | grepper |
0mArgs:{
"Expression": "^config TIPC",
"PathPrefix": "net/tipc/Kconfig"
}Results: {
"Output": "net/tipc/Kconfig=6=menuconfig TIPC\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 17:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3973 output: 33 thoughts: 31 Thoughts: Here's my thought process, as if I were considering this myself: **Investigating TIPC Configuration** Okay, so I'm looking at `TIPC` and it looks like it's the main configuration item we're working with here. I need to understand its dependencies and what enables it. The best place to start, as always, is the Kconfig file for that module. Specifically, I'll want to check `net/tipc/Kconfig`. That's where all the dependencies and conditional build logic will reside. Time to dive in and see what's what. |
| 6/2 | 2026/08/07 17:02 | tool | read-file |
0mArgs:{
"File": "net/tipc/Kconfig",
"FirstLine": 1,
"LineCount": 20
}Results: {
"Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0-only\n 2:\t#\n 3:\t# TIPC configuration\n 4:\t#\n 5:\t\n 6:\tmenuconfig TIPC\n 7:\t\ttristate \"The TIPC Protocol\"\n 8:\t\tdepends on INET\n 9:\t\thelp\n 10:\t\t The Transparent Inter Process Communication (TIPC) protocol is\n 11:\t\t specially designed for intra cluster communication. This protocol\n 12:\t\t originates from Ericsson where it has been used in carrier grade\n 13:\t\t cluster applications for many years.\n 14:\t\n 15:\t\t For more information about TIPC, see http://tipc.sourceforge.net.\n 16:\t\n 17:\t\t This protocol support is also available as a module ( = code which\n 18:\t\t can be inserted in and removed from the running kernel whenever you\n 19:\t\t want). The module will be called tipc. If you want to compile it\n 20:\t\t as a module, say M here and read \u003cfile:Documentation/kbuild/modules.rst\u003e.\n"
} |
| 7/2 | 2026/08/07 17:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 4451 output: 39 thoughts: 112 Thoughts: **Analyzing the Tipc Patch** Okay, so this change hinges on the INET implementation, which immediately makes me think about potential network implications. Let's dig into the core of this patch and see what's being modified. The central point here is the `tipc_sk_push_backlog` function. It's a static function, which is interesting, suggesting it's tightly scoped within the TIPC (Transparent Inter-Process Communication) module. Now, who's calling *that*? I need to understand the call graph to see the ramifications of this change. It's called by `__tipc_shutdown`, `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, and `tipc_sk_filter_connect`. These are all also static, and that provides some level of encapsulation. I need to understand what _calls_ those to fully comprehend the flow. This tells me where to concentrate my efforts. Let's see what those upstream functions are doing. |
| 8/2 | 2026/08/07 17:02 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_conn_proto_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=1273=static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c-1327-/**\nnet/tipc/socket.c:1328: * tipc_sk_conn_proto_rcv - receive a connection mng protocol message\nnet/tipc/socket.c-1329- * @tsk: receiving socket\n--\nnet/tipc/socket.c-1333- */\nnet/tipc/socket.c:1334:static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\nnet/tipc/socket.c-1335-\t\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c=2157=static void tipc_sk_proto_rcv(struct sock *sk,\n--\nnet/tipc/socket.c-2168-\tcase CONN_MANAGER:\nnet/tipc/socket.c:2169:\t\ttipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq);\nnet/tipc/socket.c-2170-\t\treturn;\n"
} |
| 9/2 | 2026/08/07 17:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5155 output: 37 thoughts: 27 Thoughts: Okay, here's my interpretation of that. **Analyzing the Data Flow: `tipc_sk_conn_proto_rcv`** Alright, let's break this down. From what I see here, `tipc_sk_conn_proto_rcv` isn't some standalone function, it's explicitly called by `tipc_sk_proto_rcv`. This immediately tells me something about the communication flow within the TIPC (Transparent Inter-Process Communication) socket layer. I need to understand the relationship and, more importantly, why the design is this way. So, `tipc_sk_proto_rcv` is the general receiver, the entry point for incoming data on a TIPC socket, while `tipc_sk_conn_proto_rcv` is more specialized. This suggests that `tipc_sk_conn_proto_rcv` is handling receive operations specifically for connection-oriented sockets within the TIPC protocol. It might be handling state changes, acknowledgement, or connection-specific data. I will assume it's dealing with connection-specific aspects. I'd expect to see a corresponding function for connection establishment as well - I need to explore that for a deeper understanding of the entire protocol. I should check how connection-related state is stored and retrieved within the data structures of these two functions. |
| 10/2 | 2026/08/07 17:02 | 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=2152=static void tipc_sock_destruct(struct sock *sk)\n--\nnet/tipc/socket.c-2156-\nnet/tipc/socket.c:2157:static void tipc_sk_proto_rcv(struct sock *sk,\nnet/tipc/socket.c-2158-\t\t\t struct sk_buff_head *inputq,\n--\nnet/tipc/socket.c=2347=static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-2364-\tif (unlikely(!msg_isdata(hdr)))\nnet/tipc/socket.c:2365:\t\ttipc_sk_proto_rcv(sk, \u0026inputq, xmitq);\nnet/tipc/socket.c-2366-\n"
} |
| 11/2 | 2026/08/07 17:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5874 output: 37 thoughts: 25 Thoughts: Okay, here's my interpretation of that. **Analyzing the Receiver Path in TIPC Sockets** Right, so I'm looking at the TIPC socket code, specifically the receiver path. I see that `tipc_sk_proto_rcv` is the function that handles the actual incoming packet processing for the protocol. It's the core of the receive functionality, the "guts" of the receiving process. And I notice that `tipc_sk_filter_rcv` calls it. So, `filter_rcv` must be acting as a pre-processing step, or a gatekeeper of sorts. It probably does some preliminary checks, like filtering or perhaps queue management, *before* passing the packet on to `tipc_sk_proto_rcv` for the serious work of protocol handling and socket delivery. Interesting interplay; I'll need to dig into the relationship between those two to fully understand how the receiving mechanism is structured. This is potentially where the more sophisticated filtering and policy aspects are being implemented within the TIPC stack. It makes sense, keep the protocol's primary receiving logic clean and focused and have the pre-processing be more dynamic, dependent on the configured policy. |
| 12/2 | 2026/08/07 17:03 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_filter_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2319=static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2336-/**\nnet/tipc/socket.c:2337: * tipc_sk_filter_rcv - validate incoming message\nnet/tipc/socket.c-2338- * @sk: socket\n--\nnet/tipc/socket.c-2346- */\nnet/tipc/socket.c:2347:static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\nnet/tipc/socket.c-2348-\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c-2358-\nnet/tipc/socket.c:2359:\ttrace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c-2360-\tTIPC_SKB_CB(skb)-\u003ebytes_read = 0;\n--\nnet/tipc/socket.c=2412=static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2419-\nnet/tipc/socket.c:2420:\ttipc_sk_filter_rcv(sk, skb, \u0026xmitq);\nnet/tipc/socket.c-2421-\tadded = sk_rmem_alloc_get(sk) - before;\n--\nnet/tipc/socket.c=2439=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2457-\t\tif (!sock_owned_by_user(sk)) {\nnet/tipc/socket.c:2458:\t\t\ttipc_sk_filter_rcv(sk, skb, xmitq);\nnet/tipc/socket.c-2459-\t\t\tcontinue;\n"
} |
| 13/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6740 output: 34 thoughts: 86 Thoughts: Okay, here's my interpretation of this flow, tailored for an expert audience, presented in the first person: **Decoding the TIPC Socket Data Flow** Alright, let me break this down. My understanding of the TIPC socket data flow hinges on these three functions. `tipc_sk_filter_rcv` is the pivotal function here. I see it as the central gatekeeper, and it's invoked in two distinct scenarios: first, through `tipc_sk_backlog_rcv` which, of course, serves as the standard `sk_backlog_rcv` callback for TIPC sockets—ensuring efficient handling of incoming data when the socket isn't immediately ready to process it. Secondly, `tipc_sk_filter_rcv` also gets called from within `tipc_sk_enqueue`, implying that there's a filtering/processing step happening *before* the data is ultimately enqueued onto the socket's receive queue. The fact that `tipc_sk_enqueue` is itself called by `tipc_sk_rcv` suggests that this initial enqueueing and subsequent filtering may be a crucial optimization point in the data flow. This design, with `tipc_sk_filter_rcv` at its core, likely allows for some initial inspection and filtering of the incoming data, whether it's held in the backlog or being directly enqueued. I’ll need to delve deeper into what criteria `tipc_sk_filter_rcv` uses to understand the full data processing path. |
| 14/2 | 2026/08/07 17:03 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_enqueue",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2412=static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)\n--\nnet/tipc/socket.c-2429-/**\nnet/tipc/socket.c:2430: * tipc_sk_enqueue - extract all buffers with destination 'dport' from\nnet/tipc/socket.c-2431- * inputq and try adding them to socket or backlog queue\n--\nnet/tipc/socket.c-2438- */\nnet/tipc/socket.c:2439:static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\nnet/tipc/socket.c-2440-\t\t\t u32 dport, struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c=2493=void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\n--\nnet/tipc/socket.c-2509-\t\t\tif (likely(spin_trylock_bh(\u0026sk-\u003esk_lock.slock))) {\nnet/tipc/socket.c:2510:\t\t\t\ttipc_sk_enqueue(inputq, sk, dport, \u0026xmitq);\nnet/tipc/socket.c-2511-\t\t\t\tspin_unlock_bh(\u0026sk-\u003esk_lock.slock);\n"
} |
| 15/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7555 output: 36 thoughts: 29 Thoughts: Here's my take on those thoughts: **Analyzing `tipc_sk_rcv` and Connection Filtering** Okay, so `tipc_sk_rcv` isn't static. That's a good starting point. Now I need to see how that impacts its use and, more importantly, how it interacts with other parts of the TIPC stack. I'm going to shift my focus to `tipc_sk_filter_connect` to better understand the connection filtering logic and identify how data is received when connection filtering is used. I anticipate it's likely used within the function to handle connection requests with those defined filter specifications. Let me trace the calls and data flow there. It's likely that `tipc_sk_rcv` is invoked, directly or indirectly, within the scope of filter evaluation. |
| 16/2 | 2026/08/07 17:03 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_filter_connect",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=2157=static void tipc_sk_proto_rcv(struct sock *sk,\n--\nnet/tipc/socket.c-2196-/**\nnet/tipc/socket.c:2197: * tipc_sk_filter_connect - check incoming message for a connection-based socket\nnet/tipc/socket.c-2198- * @tsk: TIPC socket\n--\nnet/tipc/socket.c-2202- */\nnet/tipc/socket.c:2203:static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,\nnet/tipc/socket.c-2204-\t\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c=2347=static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-2376-\t\tlimit = rcvbuf_limit(sk, skb);\nnet/tipc/socket.c:2377:\t\tif ((sk_conn \u0026\u0026 !tipc_sk_filter_connect(tsk, skb, xmitq)) ||\nnet/tipc/socket.c-2378-\t\t (!sk_conn \u0026\u0026 msg_connected(hdr)) ||\n"
} |
| 17/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 8145 output: 33 thoughts: 108 Thoughts: **Analyzing TIPC Socket Filtering and Shutdown Paths** Okay, so I'm looking at how TIPC socket filtering and shutdown are handled, and it seems like `tipc_sk_filter_connect` is an important function. I'm noting that it's called not just from the connection process, but also from `tipc_sk_filter_rcv`. This means it's involved in more than just initial connection setup; it's also relevant during message reception. Now, considering the core entry points for data handling, I see three key paths: * `tipc_sk_rcv`: This is the standard receive path. * `tipc_sk_backlog_rcv`: This one comes into play through the socket backlog mechanism (`sk_backlog_rcv`). * `__tipc_shutdown`: This is triggered during shutdown, ultimately called via the socket operation's shutdown function (`tipc_shutdown` which wraps `socket_ops->shutdown`). Since shutdown is critical for a well-behaved system, I'm going to focus my attention on understanding the callers of `__tipc_shutdown`. Understanding what initiates shutdown will be key in understanding how this aspect of the TIPC socket implementation operates. |
| 18/2 | 2026/08/07 17:03 | tool | grepper |
0mArgs:{
"Expression": "__tipc_shutdown",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/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=2809=static int tipc_shutdown(struct socket *sock, int how)\n--\nnet/tipc/socket.c-2819-\ttrace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c:2820:\t__tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);\nnet/tipc/socket.c-2821-\tsk-\u003esk_shutdown = SHUTDOWN_MASK;\n"
} |
| 19/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 8928 output: 37 thoughts: 89 Thoughts: Okay, here's my summary, considering my expertise: **My Focused Look at the TIPC Socket Operations** Right, let's zero in. I'm taking a close look at the TIPC socket operations, specifically focusing on the lifecycle of a connection. From what I understand, `tipc_release` and `tipc_shutdown` are the key functions involved in managing the socket's resources and handling its closure. Knowing that, I need to understand the critical paths. Therefore, my primary focus will be on these symbols: `tipc_sk_rcv`, `tipc_release`, and `tipc_shutdown`. These will tell the story of the data reception, connection release, and termination. I see the flow from one point to the next, like a river of data, and these are the banks, or edges of that river. I'm wondering if `tipc_sk_push_backlog` is how data waiting to be sent is handled. I need to understand where it is called to determine how messages are being sent. So, I need to check whether `tipc_sendmsg` or `tipc_sendstream` are the callers. This will give me a critical piece of the puzzle. |
| 20/2 | 2026/08/07 17:03 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_push_backlog",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/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,\nnet/tipc/socket.c-160-\t\t\t\t struct sk_buff_head *xmitq);\n--\nnet/tipc/socket.c=550=static void __tipc_shutdown(struct socket *sock, int error)\n--\nnet/tipc/socket.c-563-\t/* Push out delayed messages if in Nagle mode */\nnet/tipc/socket.c:564:\ttipc_sk_push_backlog(tsk, false, NULL);\nnet/tipc/socket.c-565-\t/* Remove pending SYN */\n--\nnet/tipc/socket.c=1192=void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,\n--\nnet/tipc/socket.c-1268-\nnet/tipc/socket.c:1269:/* tipc_sk_push_backlog(): send accumulated buffers in socket write queue\nnet/tipc/socket.c-1270- * when socket is in Nagle mode\n--\nnet/tipc/socket.c-1272- */\nnet/tipc/socket.c:1273:static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\nnet/tipc/socket.c-1274-\t\t\t\t struct sk_buff_head *xmitq)\n--\nnet/tipc/socket.c=1334=static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-1378-\t\twas_cong = tsk_conn_cong(tsk);\nnet/tipc/socket.c:1379:\t\ttipc_sk_push_backlog(tsk, msg_nagle_ack(hdr), xmitq);\nnet/tipc/socket.c-1380-\t\ttsk-\u003esnt_unacked -= msg_conn_ack(hdr);\n--\nnet/tipc/socket.c=2157=static void tipc_sk_proto_rcv(struct sock *sk,\n--\nnet/tipc/socket.c-2176-\t\twakeup = true;\nnet/tipc/socket.c:2177:\t\ttipc_sk_push_backlog(tsk, false, xmitq);\nnet/tipc/socket.c-2178-\t\tbreak;\n--\nnet/tipc/socket.c=2203=static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-2267-\t\tif (!skb_queue_empty(\u0026sk-\u003esk_write_queue))\nnet/tipc/socket.c:2268:\t\t\ttipc_sk_push_backlog(tsk, false, xmitq);\nnet/tipc/socket.c-2269-\t\t/* Accept only connection-based messages sent by peer */\n"
} |
| 21/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 10147 output: 33 thoughts: 185 Thoughts: **Analyzing TIPC Socket Buffer Management** Okay, so I'm looking at this TIPC code, and it seems this change, while not *directly* in `tipc_sendmsg`, is definitely tied to how buffers are handled when Nagle mode is enabled on a socket. The patch is touching `tipc_sk_push_backlog`, which is where we manage the backlog of data to be transmitted. Specifically, if the `xmitq` (transmit queue) is present, and the destination node is the local node, it splices the `txq` (transmit queue) to the `xmitq`. It's a functional modification, and I need to understand the implications better. To get a complete picture, I need to consider a few other functions. First, `tipc_sk_rcv` is key, as it's the core receive function for TIPC sockets. I'll also check `tipc_sk_backlog_rcv` to see how it interacts with the backlog. Then there's the socket operations themselves: `tipc_release` and `tipc_shutdown`, I need to keep those in mind. And finally, I should review `tipc_sendmsg` and `tipc_sendstream` because they're responsible for actually queuing the buffers that are ultimately involved in this splicing operation. Understanding how they interact with this new splice logic is going to be crucial to determining the impact of this change. |
| 22/2 | 2026/08/07 17:03 | 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=1334=static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-1392-/**\nnet/tipc/socket.c:1393: * tipc_sendmsg - send message in connectionless manner\nnet/tipc/socket.c-1394- * @sock: socket structure\n--\nnet/tipc/socket.c-1404- */\nnet/tipc/socket.c:1405:static int tipc_sendmsg(struct socket *sock,\nnet/tipc/socket.c-1406-\t\t\tstruct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1411-\tlock_sock(sk);\nnet/tipc/socket.c:1412:\tret = __tipc_sendmsg(sock, m, dsz);\nnet/tipc/socket.c-1413-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1417-\nnet/tipc/socket.c:1418:static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1419-{\n--\nnet/tipc/socket.c=1565=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1585-\tif (unlikely(dest \u0026\u0026 sk-\u003esk_state == TIPC_OPEN)) {\nnet/tipc/socket.c:1586:\t\trc = __tipc_sendmsg(sock, m, dlen);\nnet/tipc/socket.c-1587-\t\tif (dlen \u0026\u0026 dlen == rc) {\n--\nnet/tipc/socket.c=2583=static int tipc_connect(struct socket *sock, struct sockaddr_unsized *dest,\n--\nnet/tipc/socket.c-2637-\nnet/tipc/socket.c:2638:\t\tres = __tipc_sendmsg(sock, \u0026m, 0);\nnet/tipc/socket.c-2639-\t\tif ((res \u003c 0) \u0026\u0026 (res != -EWOULDBLOCK))\n--\nnet/tipc/socket.c=3367=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3381-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3382:\t.sendmsg\t= tipc_sendmsg,\nnet/tipc/socket.c-3383-\t.recvmsg\t= tipc_recvmsg,\n"
} |
| 23/2 | 2026/08/07 17:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12098 output: 33 thoughts: 67 Thoughts: Okay, let's get down to brass tacks. **Focus Symbols for Examination** Right, so I've been thinking about the critical focus symbols we need to really dig into here. Based on my analysis, these are the ones that jump out: `tipc_sk_rcv`, `tipc_sendmsg`, `tipc_sendstream`, `tipc_release`, and `tipc_shutdown`. These look like the key pieces of the puzzle when we're trying to understand the system. Let's make sure we include `tipc_sendstream`. I've got a hunch it'll be particularly interesting. |
| 24/2 | 2026/08/07 17:04 | 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=1418=static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1542-/**\nnet/tipc/socket.c:1543: * tipc_sendstream - send stream-oriented data\nnet/tipc/socket.c-1544- * @sock: socket structure\n--\nnet/tipc/socket.c-1552- */\nnet/tipc/socket.c:1553:static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)\nnet/tipc/socket.c-1554-{\n--\nnet/tipc/socket.c-1558-\tlock_sock(sk);\nnet/tipc/socket.c:1559:\tret = __tipc_sendstream(sock, m, dsz);\nnet/tipc/socket.c-1560-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1564-\nnet/tipc/socket.c:1565:static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1566-{\n--\nnet/tipc/socket.c=1660=static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1664-\nnet/tipc/socket.c:1665:\treturn tipc_sendstream(sock, m, dsz);\nnet/tipc/socket.c-1666-}\n--\nnet/tipc/socket.c=2729=static int tipc_accept(struct socket *sock, struct socket *new_sock,\n--\nnet/tipc/socket.c-2792-\tiov_iter_kvec(\u0026m.msg_iter, ITER_SOURCE, NULL, 0, 0);\nnet/tipc/socket.c:2793:\t__tipc_sendstream(new_sock, \u0026m, 0);\nnet/tipc/socket.c-2794-\trelease_sock(new_sk);\n--\nnet/tipc/socket.c=3407=static const struct proto_ops stream_ops = {\n--\nnet/tipc/socket.c-3421-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3422:\t.sendmsg\t= tipc_sendstream,\nnet/tipc/socket.c-3423-\t.recvmsg\t= tipc_recvstream,\n"
} |
| 25/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13152 output: 35 thoughts: 53 Thoughts: Okay, let's break this down. **Diving into TIPC Socket Operations** Right, so I'm focusing on the TIPC socket operations, specifically the send functions. I know `tipc_sendstream` and `tipc_sendmsg` are the key ones for stream and message sockets, respectively. And, if I recall correctly, `tipc_send_packet` handles the packet sockets. I should make a note of this to have my basics straight and to keep things organised. Now, let's shift gears and dig into the receive path. I need to understand how data is actually *received* within this whole framework. Let's see how `tipc_sk_rcv` works. That should give me a solid grasp of how everything connects on the receive side. |
| 26/2 | 2026/08/07 17:04 | tool | grepper |
0mArgs:{
"Expression": "tipc_sk_rcv",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/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=2439=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2486-/**\nnet/tipc/socket.c:2487: * tipc_sk_rcv - handle a chain of incoming buffers\nnet/tipc/socket.c-2488- * @net: the associated network namespace\n--\nnet/tipc/socket.c-2492- */\nnet/tipc/socket.c:2493:void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\nnet/tipc/socket.c-2494-{\n"
} |
| 27/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13711 output: 32 thoughts: 42 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: **Investigating `tipc_sk_rcv` Usage in the TIPC Subsystem** Alright, so `tipc_sk_rcv` is non-static and apparently either exported or, at the very least, actively utilized outside of its immediate definition. That's a key detail. This suggests it's a critical entry point or a core function within the TIPC (Transparent Inter-Process Communication) framework, and I need to understand its role more deeply. My next step is clear: I need to trace its usage. I'll need to meticulously examine other source files within the TIPC codebase to determine exactly where and how `tipc_sk_rcv` is being called. I'm looking for the context – who's calling it, what arguments are being passed, and what's the overall flow of control that brings us here. Understanding the calling context will shed light on what its functionality is. Knowing it isn't static limits where I need to look, which will save time. Time to fire up the tools and dig in. |
| 28/2 | 2026/08/07 17:04 | 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=2439=static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,\n--\nnet/tipc/socket.c-2486-/**\nnet/tipc/socket.c:2487: * tipc_sk_rcv - handle a chain of incoming buffers\nnet/tipc/socket.c-2488- * @net: the associated network namespace\n--\nnet/tipc/socket.c-2492- */\nnet/tipc/socket.c:2493:void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\nnet/tipc/socket.c-2494-{\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"
} |
| 29/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15600 output: 30 thoughts: 36 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: **Focusing on TIPC Communication** Alright, looking at this code, `tipc_sk_rcv` seems like a good starting point for understanding how the core TIPC receiver functions. My expertise tells me that this function likely handles the crucial task of receiving incoming TIPC messages. Understanding this will be key to pinpointing potential bottlenecks, security vulnerabilities, or performance optimization opportunities within the receiver implementation. Now, to get the full picture and see how the messages arrive at the receiver, I should also immediately shift my attention to `tipc_sendmsg` and `tipc_sendstream`. Those two functions are probably the entry points for the sending side of things. I need to understand how the messages are constructed, put on the wire, and what flow control or rate limiting, if any, the sending side enforces. Seeing how these functions interact is critical to understanding the complete communication flow, which is how I can develop a good plan to optimize the system. |
| 30/2 | 2026/08/07 17:04 | tool | grepper |
0mArgs:{
"Expression": "tipc_sendmsg",
"PathPrefix": "net/tipc/"
}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=1334=static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-1392-/**\nnet/tipc/socket.c:1393: * tipc_sendmsg - send message in connectionless manner\nnet/tipc/socket.c-1394- * @sock: socket structure\n--\nnet/tipc/socket.c-1404- */\nnet/tipc/socket.c:1405:static int tipc_sendmsg(struct socket *sock,\nnet/tipc/socket.c-1406-\t\t\tstruct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1411-\tlock_sock(sk);\nnet/tipc/socket.c:1412:\tret = __tipc_sendmsg(sock, m, dsz);\nnet/tipc/socket.c-1413-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1417-\nnet/tipc/socket.c:1418:static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1419-{\n--\nnet/tipc/socket.c=1565=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1585-\tif (unlikely(dest \u0026\u0026 sk-\u003esk_state == TIPC_OPEN)) {\nnet/tipc/socket.c:1586:\t\trc = __tipc_sendmsg(sock, m, dlen);\nnet/tipc/socket.c-1587-\t\tif (dlen \u0026\u0026 dlen == rc) {\n--\nnet/tipc/socket.c=2583=static int tipc_connect(struct socket *sock, struct sockaddr_unsized *dest,\n--\nnet/tipc/socket.c-2637-\nnet/tipc/socket.c:2638:\t\tres = __tipc_sendmsg(sock, \u0026m, 0);\nnet/tipc/socket.c-2639-\t\tif ((res \u003c 0) \u0026\u0026 (res != -EWOULDBLOCK))\n--\nnet/tipc/socket.c=3367=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3381-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3382:\t.sendmsg\t= tipc_sendmsg,\nnet/tipc/socket.c-3383-\t.recvmsg\t= tipc_recvmsg,\n"
} |
| 31/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 17310 output: 32 thoughts: 203 Thoughts: **Analyzing TIPC Socket Function Reachability** Okay, so I'm looking at `net/tipc/socket.c` and trying to figure out the access paths to its functions. Specifically, I'm focusing on `tipc_sendmsg` and `tipc_sendstream`. The initial observation is that they are *declared* as `static` functions within the file, which usually implies limited scope and potential for inlining. But, and this is the critical point, they are assigned to `proto_ops`. That's how these functions become reachable via syscalls. Now, if they *were* purely static, there’s a slight chance the compiler might inline them, and they wouldn't have their own discrete symbol address in the kernel image. But being assigned as function pointers to `proto_ops` prevents this. The compiler *must* treat them as distinct, external-facing entry points. So, I need to be sure I am tracing the right functions. Wait a minute, `__tipc_sendmsg` and `__tipc_sendstream` are also static, so I could be getting confused there. Let's stick with `tipc_sendmsg` and `tipc_sendstream` to avoid confusion. Okay, let's step back a moment and focus on the receiving side. `tipc_sk_rcv` is non-static, so at least one receiving function is accessible. I need to note this for later. I am also seeing that `tipc_node_xmit` is *also* non-static. Looking further, I see that `tipc_node_xmit` is called from `tipc_sk_push_backlog`, which is interesting. I should probably focus on `tipc_node_xmit` for a moment. |
| 32/2 | 2026/08/07 17:04 | 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=1273=static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack,\n--\nnet/tipc/socket.c-1321-\nnet/tipc/socket.c:1322:\trc = tipc_node_xmit(net, txq, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-1323-\tif (rc == -ELINKCONG)\n--\nnet/tipc/socket.c=1418=static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1523-\ttrace_tipc_sk_sendmsg(sk, skb_peek(\u0026pkts), TIPC_DUMP_SK_SNDQ, \" \");\nnet/tipc/socket.c:1524:\trc = tipc_node_xmit(net, \u0026pkts, skaddr.node, tsk-\u003eportid);\nnet/tipc/socket.c-1525-\tif (unlikely(rc == -ELINKCONG)) {\n--\nnet/tipc/socket.c=1565=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1634-\t\t\t\t\t TIPC_DUMP_SK_SNDQ, \" \");\nnet/tipc/socket.c:1635:\t\trc = tipc_node_xmit(net, txq, dnode, tsk-\u003eportid);\nnet/tipc/socket.c-1636-\t\tif (unlikely(rc == -ELINKCONG)) {\n--\nnet/tipc/socket.c=1829=static void tipc_sk_send_ack(struct tipc_sock *tsk)\n--\nnet/tipc/socket.c-1836-\nnet/tipc/socket.c:1837:\ttipc_node_xmit_skb(sock_net(\u0026tsk-\u003esk), skb, tsk_peer_node(tsk),\nnet/tipc/socket.c-1838-\t\t\t msg_link_selector(buf_msg(skb)));\n--\nnet/tipc/socket.c=2493=void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)\n--\nnet/tipc/socket.c-2534-\t\tdnode = msg_destnode(buf_msg(skb));\nnet/tipc/socket.c:2535:\t\ttipc_node_xmit_skb(net, skb, dnode, dport);\nnet/tipc/socket.c-2536-\t}\n--\nnet/tipc/socket.c=2878=static void tipc_sk_timeout(struct timer_list *t)\n--\nnet/tipc/socket.c-2904-\tif (!skb_queue_empty(\u0026list))\nnet/tipc/socket.c:2905:\t\trc = tipc_node_xmit(sock_net(sk), \u0026list, pnode, tsk-\u003eportid);\nnet/tipc/socket.c-2906-\n"
} |
| 33/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20504 output: 33 thoughts: 81 Thoughts: Okay, let's break this down. **Initial Considerations for TIPC Kernel Module Analysis** Right, so I need to get my bearings on this TIPC kernel module. Based on what I've seen, I'm thinking that `tipc_node_xmit` will be a critical function to really understand. It's probably the core transmission function. I'll also want to look at `tipc_sk_rcv`, as that's likely the receive path. And since this is related to socket operations, `tipc_sendmsg` and `tipc_sendstream` are clearly relevant – the fact that they are exported as socket operations is a major clue as to their significance. Now, I'm going to dive right into the `net/tipc/socket.c` file. Given the context, that's where I would expect to find the implementations of `tipc_sendmsg` and `tipc_sendstream`. Let's get to it. |
| 34/2 | 2026/08/07 17:04 | 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=1334=static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,\n--\nnet/tipc/socket.c-1392-/**\nnet/tipc/socket.c:1393: * tipc_sendmsg - send message in connectionless manner\nnet/tipc/socket.c-1394- * @sock: socket structure\n--\nnet/tipc/socket.c-1404- */\nnet/tipc/socket.c:1405:static int tipc_sendmsg(struct socket *sock,\nnet/tipc/socket.c-1406-\t\t\tstruct msghdr *m, size_t dsz)\n--\nnet/tipc/socket.c-1411-\tlock_sock(sk);\nnet/tipc/socket.c:1412:\tret = __tipc_sendmsg(sock, m, dsz);\nnet/tipc/socket.c-1413-\trelease_sock(sk);\n--\nnet/tipc/socket.c-1417-\nnet/tipc/socket.c:1418:static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)\nnet/tipc/socket.c-1419-{\n--\nnet/tipc/socket.c=1565=static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)\n--\nnet/tipc/socket.c-1585-\tif (unlikely(dest \u0026\u0026 sk-\u003esk_state == TIPC_OPEN)) {\nnet/tipc/socket.c:1586:\t\trc = __tipc_sendmsg(sock, m, dlen);\nnet/tipc/socket.c-1587-\t\tif (dlen \u0026\u0026 dlen == rc) {\n--\nnet/tipc/socket.c=2583=static int tipc_connect(struct socket *sock, struct sockaddr_unsized *dest,\n--\nnet/tipc/socket.c-2637-\nnet/tipc/socket.c:2638:\t\tres = __tipc_sendmsg(sock, \u0026m, 0);\nnet/tipc/socket.c-2639-\t\tif ((res \u003c 0) \u0026\u0026 (res != -EWOULDBLOCK))\n--\nnet/tipc/socket.c=3367=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3381-\t.getsockopt_iter = tipc_getsockopt,\nnet/tipc/socket.c:3382:\t.sendmsg\t= tipc_sendmsg,\nnet/tipc/socket.c-3383-\t.recvmsg\t= tipc_recvmsg,\n"
} |
| 35/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 22254 output: 32 thoughts: 307 Thoughts: **Analyzing TIPC Function Symbol Reachability** Okay, so I'm looking at how these TIPC functions relate to each other, particularly for potential analysis or instrumentation. I see that `tipc_sendmsg` and `tipc_sendstream` are declared as `static`, but then they're assigned to `proto_ops`. That's interesting, and it makes them potential focus symbols. My initial thought is to use them, but then I realize that *because* they're `static`, there's a chance they won't be exported as symbols in the kernel if the compiler inlines them. But wait... since they're assigned to function pointers within `proto_ops`, they *can't* be inlined. That changes things; it's looking promising. However, `tipc_sk_rcv` is definitely non-static and exported. That's a solid, guaranteed symbol to work with. So, let's include that in the set, along with `tipc_node_xmit`, `tipc_sendmsg`, and `tipc_sendstream`. These seem like the primary entry points. Now, I'm thinking about where `tipc_sk_push_backlog` fits into all this. The question is, can I reach it from `tipc_sendmsg` or `tipc_sendstream`? Looking at the code, it's called from a few places. I see `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, `tipc_sk_filter_connect`, and `__tipc_shutdown`. Hmm, so it’s predominantly from the receive path (so, potentially, `tipc_sk_rcv`) and the shutdown path (using `tipc_shutdown` or `tipc_release`). That implies that `tipc_sk_rcv`, `tipc_release`, and `tipc_shutdown` are actually the best focus symbols to start with. They offer the most complete view. Alright, let's verify those. I need to confirm the behavior of both `tipc_release` and `tipc_shutdown`. They become the critical symbols to investigate further. |
| 36/2 | 2026/08/07 17:04 | tool | grepper |
0mArgs:{
"Expression": "tipc_release",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/tipc/socket.c=148=static void tipc_sock_destruct(struct sock *sk);\nnet/tipc/socket.c:149:static int tipc_release(struct socket *sock);\nnet/tipc/socket.c-150-static void tipc_sk_timeout(struct timer_list *t);\n--\nnet/tipc/socket.c=550=static void __tipc_shutdown(struct socket *sock, int error)\n--\nnet/tipc/socket.c-610-/**\nnet/tipc/socket.c:611: * tipc_release - destroy a TIPC socket\nnet/tipc/socket.c-612- * @sock: socket to destroy\n--\nnet/tipc/socket.c-625- */\nnet/tipc/socket.c:626:static int tipc_release(struct socket *sock)\nnet/tipc/socket.c-627-{\n--\nnet/tipc/socket.c=3367=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3369-\t.family\t\t= AF_TIPC,\nnet/tipc/socket.c:3370:\t.release\t= tipc_release,\nnet/tipc/socket.c-3371-\t.bind\t\t= tipc_bind,\n--\nnet/tipc/socket.c=3387=static const struct proto_ops packet_ops = {\n--\nnet/tipc/socket.c-3389-\t.family\t\t= AF_TIPC,\nnet/tipc/socket.c:3390:\t.release\t= tipc_release,\nnet/tipc/socket.c-3391-\t.bind\t\t= tipc_bind,\n--\nnet/tipc/socket.c=3407=static const struct proto_ops stream_ops = {\n--\nnet/tipc/socket.c-3409-\t.family\t\t= AF_TIPC,\nnet/tipc/socket.c:3410:\t.release\t= tipc_release,\nnet/tipc/socket.c-3411-\t.bind\t\t= tipc_bind,\n"
} |
| 37/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 23634 output: 32 thoughts: 40 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Analyzing the TIPC Shutdown Mechanism** Alright, so `tipc_release` is declared as static. But hold on, it's getting assigned to `proto_ops`. That's a classic code optimization, keeping the function scoped where it's only needed. And the same pattern goes for `tipc_shutdown`. This screams that there's some kind of managed lifecycle or cleanup sequence at play. My immediate focus then has to be `tipc_shutdown`. Let's dig into that and see precisely how it's being used within the larger context. We need to ascertain where it's being called, under what conditions, and what resources are being deallocated during its execution. The whole thing hinges on understanding the cleanup process, especially considering that the release function is also static and assigned. This is a tell of important resource management. |
| 38/2 | 2026/08/07 17:04 | tool | grepper |
0mArgs:{
"Expression": "tipc_shutdown",
"PathPrefix": "net/tipc/socket.c"
}Results: {
"Output": "net/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=2729=static int tipc_accept(struct socket *sock, struct socket *new_sock,\n--\nnet/tipc/socket.c-2800-/**\nnet/tipc/socket.c:2801: * tipc_shutdown - shutdown socket connection\nnet/tipc/socket.c-2802- * @sock: socket structure\n--\nnet/tipc/socket.c-2808- */\nnet/tipc/socket.c:2809:static int tipc_shutdown(struct socket *sock, int how)\nnet/tipc/socket.c-2810-{\n--\nnet/tipc/socket.c-2819-\ttrace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, \" \");\nnet/tipc/socket.c:2820:\t__tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);\nnet/tipc/socket.c-2821-\tsk-\u003esk_shutdown = SHUTDOWN_MASK;\n--\nnet/tipc/socket.c=3367=static const struct proto_ops msg_ops = {\n--\nnet/tipc/socket.c-3378-\t.listen\t\t= sock_no_listen,\nnet/tipc/socket.c:3379:\t.shutdown\t= tipc_shutdown,\nnet/tipc/socket.c-3380-\t.setsockopt\t= tipc_setsockopt,\n--\nnet/tipc/socket.c=3387=static const struct proto_ops packet_ops = {\n--\nnet/tipc/socket.c-3398-\t.listen\t\t= tipc_listen,\nnet/tipc/socket.c:3399:\t.shutdown\t= tipc_shutdown,\nnet/tipc/socket.c-3400-\t.setsockopt\t= tipc_setsockopt,\n--\nnet/tipc/socket.c=3407=static const struct proto_ops stream_ops = {\n--\nnet/tipc/socket.c-3418-\t.listen\t\t= tipc_listen,\nnet/tipc/socket.c:3419:\t.shutdown\t= tipc_shutdown,\nnet/tipc/socket.c-3420-\t.setsockopt\t= tipc_setsockopt,\n"
} |
| 39/2 | 2026/08/07 17:04 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24735 output: 113 thoughts: 180 Thoughts: **My Assessment of the TIPC Code for Fuzzing** Alright, let's break this down. My initial instinct is that `tipc_sk_rcv`, `tipc_release`, and `tipc_shutdown` are key functions to focus on. They seem to represent core interactions within the TIPC (Transparent Inter-Process Communication) system. The configuration flag I need to ensure is enabled is `TIPC`. I should quickly double-check that there aren't any other dependent configurations I need to be aware of, but based on the kernel config file, `net/tipc/Kconfig` relies on `INET`, but `TIPC` should be the only requirement. Here's my distilled understanding: I deem this code "WorthFuzzing" due to the functional nature of the change. My focus should be on the `FocusSymbols` - specifically, `tipc_sk_rcv`, `tipc_release`, and `tipc_shutdown`. I need to ensure that the `EnableConfigs` include `TIPC`. The core reason for this assessment lies in the patch itself: it's modifying `tipc_sk_push_backlog` to splice the transmit queue to the receive output queue, but only when the destination is the same node. This is a behavioral change within the TIPC protocol implementation, and userspace access through TIPC sockets makes this particularly interesting for potential vulnerabilities. |
| 40/2 | 2026/08/07 17:04 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_release",
"tipc_shutdown"
],
"Reasoning": "The patch modifies `tipc_sk_push_backlog` to splice the transmit queue to the receive output queue if the destination is the own node. This is a functional change in the TIPC protocol implementation, which is reachable from userspace via TIPC sockets.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"TIPC"
],
"FocusSymbols": [
"tipc_sk_rcv",
"tipc_release",
"tipc_shutdown"
],
"Reasoning": "The patch modifies `tipc_sk_push_backlog` to splice the transmit queue to the receive output queue if the destination is the own node. This is a functional change in the TIPC protocol implementation, which is reachable from userspace via TIPC sockets.",
"WorthFuzzing": true
} |
| 41/1 | 2026/08/07 17:04 | action | If |
0mArgs:{
"WorthFuzzing": true
}Results: null |
| 42/2 | 2026/08/07 17:04 | agent | kmsan-evaluator |
0mModel:best-expensive Args: null Results: {
"KMSANReasoning": "The patch modifies the `tipc_sk_push_backlog` function to accept an additional `xmitq` argument. Instead of immediately transmitting packets via `tipc_node_xmit`, it splices the socket's write queue into the provided `xmitq` if the destination is the local node. This is a control flow and queue management change, likely intended to fix a locking issue, deadlock, or recursion problem during packet reception. It does not introduce any new allocations, modify data structures sent to user space, or alter bounds checking in a way that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free or deadlocks) would be caught by standard KASAN or LOCKDEP. Therefore, a dedicated KMSAN fuzzing session is not necessary.",
"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 6fdf48ab20c84a43a77f6e035663fcefa1280e09
Author: syz-cluster <triage@syzkaller.com>
Date: Fri Aug 7 17:02:22 2026 +0000
syz-cluster: applied patch under review
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e564341e0216d..33d744dc514f5 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);
@@ -1267,8 +1268,10 @@ 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
+ * @xmitq: receive output queue, or NULL outside receive context
*/
-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 +1313,12 @@ 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 +1376,7 @@ 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 +2174,7 @@ 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 +2265,7 @@ 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)) {
|
| 43/3 | 2026/08/07 17:04 | llm | kmsan-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3094 output: 194 thoughts: 593 Thoughts: **Analyzing the TIPC Socket Patch** Okay, let's break down this TIPC socket patch. My initial thought is that it modifies `tipc_sk_push_backlog` in `net/tipc/socket.c` by adding a new argument, `struct sk_buff_head *xmitq`. The core logic change seems to be around how the transmit queue (`txq`) is handled when the destination node is the local node. Instead of immediately calling `tipc_node_xmit`, the patch now splices the `txq` into the provided `xmitq`. This immediately screams potential optimization or, more likely, a fix for a subtle bug. My gut feeling is that `tipc_node_xmit` was being called in a problematic context, perhaps with the wrong locks held or in a deep recursion that could lead to deadlocks. Alternatively, the new approach might simply be deferring local delivery for optimization purposes by appending to `xmitq` which is then processed later. The fact that `tipc_sk_push_backlog` is called from `tipc_sk_conn_proto_rcv`, `tipc_sk_proto_rcv`, `tipc_sk_filter_connect`, and `__tipc_shutdown` gives me a clearer picture: this patch is being applied in *receive* contexts. So, they are passing `xmitq` to `tipc_sk_push_backlog` in these receive paths. Now, the crucial question: are there any uninitialized memory risks introduced? No, from what I'm seeing, this is purely a logic change within queue management. It's about splicing a queue versus immediate transmission. There are no new allocations, no new data structures sent to user space, and no changes to bounds checking that would expose uninitialized memory. Therefore, KMSAN is not a concern here. KASAN/LOCKDEP should be sufficient to catch any issues related to use-after-free conditions or deadlocks which is what I suspect this patch is addressing (calling `tipc_node_xmit` while holding a lock that shouldn't be held, or avoiding deep recursion). I'm comfortable setting `NeedsKMSAN=false` given the nature of the change. This is a control flow and queue management alteration. I'll double check the code snippet one more time to be sure. |
| 44/3 | 2026/08/07 17:05 | tool | set-results |
0mArgs:{
"KMSANReasoning": "The patch modifies the `tipc_sk_push_backlog` function to accept an additional `xmitq` argument. Instead of immediately transmitting packets via `tipc_node_xmit`, it splices the socket's write queue into the provided `xmitq` if the destination is the local node. This is a control flow and queue management change, likely intended to fix a locking issue, deadlock, or recursion problem during packet reception. It does not introduce any new allocations, modify data structures sent to user space, or alter bounds checking in a way that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free or deadlocks) would be caught by standard KASAN or LOCKDEP. Therefore, a dedicated KMSAN fuzzing session is not necessary.",
"NeedsKMSAN": false
}Results: {
"KMSANReasoning": "The patch modifies the `tipc_sk_push_backlog` function to accept an additional `xmitq` argument. Instead of immediately transmitting packets via `tipc_node_xmit`, it splices the socket's write queue into the provided `xmitq` if the destination is the local node. This is a control flow and queue management change, likely intended to fix a locking issue, deadlock, or recursion problem during packet reception. It does not introduce any new allocations, modify data structures sent to user space, or alter bounds checking in a way that could expose uninitialized memory. Any potential bugs introduced by this change (such as use-after-free or deadlocks) would be caught by standard KASAN or LOCKDEP. Therefore, a dedicated KMSAN fuzzing session is not necessary.",
"NeedsKMSAN": false
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|