AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/11 14:31 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a userspace test helper file (tools/testing/selftests/bpf/network_helpers.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}
1/1 2026/07/11 14:31 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit e15af753378736622d5d06d153bdb391796a0e54\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Jul 11 14:31:02 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c\nindex db935a9d9fc1a1..43c9e215c3f148 100644\n--- a/tools/testing/selftests/bpf/network_helpers.c\n+++ b/tools/testing/selftests/bpf/network_helpers.c\n@@ -14,6 +14,7 @@\n #include \u003csys/types.h\u003e\n #include \u003csys/un.h\u003e\n #include \u003csys/eventfd.h\u003e\n+#include \u003csys/poll.h\u003e\n \n #include \u003clinux/err.h\u003e\n #include \u003clinux/in.h\u003e\n@@ -40,6 +41,8 @@\n #define IPPROTO_MPTCP 262\n #endif\n \n+#define CONNECTION_IN_PROGRESS_TIMEOUT_MS\t3000\n+\n #define clean_errno() (errno == 0 ? \"None\" : strerror(errno))\n #define log_err(MSG, ...) ({\t\t\t\t\t\t\\\n \t\t\tint __save = errno;\t\t\t\t\\\n@@ -294,7 +297,8 @@ int client_socket(int family, int type,\n int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t addrlen,\n \t\t    const struct network_helper_opts *opts)\n {\n-\tint fd;\n+\tsocklen_t errlen;\n+\tint fd, err;\n \n \tif (!opts)\n \t\topts = \u0026default_opts;\n@@ -305,13 +309,42 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add\n \t\treturn -1;\n \t}\n \n-\tif (connect(fd, (const struct sockaddr *)addr, addrlen)) {\n-\t\tlog_err(\"Failed to connect to server\");\n-\t\tsave_errno_close(fd);\n-\t\treturn -1;\n+\terr = connect(fd, (const struct sockaddr *)addr, addrlen);\n+\tif (err \u0026\u0026 errno == EINPROGRESS) {\n+\t\tstruct pollfd pfd = { .fd = fd, .events = POLLOUT };\n+\n+\t\terr = 0;\n+\t\terr = poll(\u0026pfd, 1, CONNECTION_IN_PROGRESS_TIMEOUT_MS);\n+\n+\t\tif (err \u003c= 0) {\n+\t\t\tif (err == 0) {\n+\t\t\t\tlog_err(\"Connection timeout\");\n+\t\t\t\terrno = ETIMEDOUT;\n+\t\t\t} else {\n+\t\t\t\tlog_err(\"Failed to poll connection status\");\n+\t\t\t}\n+\t\t\tgoto close;\n+\t\t}\n+\n+\t\terrlen = sizeof(err);\n+\t\tif (getsockopt(fd, SOL_SOCKET, SO_ERROR, \u0026err, \u0026errlen) \u003c 0) {\n+\t\t\tlog_err(\"Failed to getsockopt\");\n+\t\t\tgoto close;\n+\t\t}\n+\n+\t\tif (err) {\n+\t\t\tlog_err(\"Failed to connect to server\");\n+\t\t\terrno = err;\n+\t\t\tgoto close;\n+\t\t}\n+\t} else if (err) {\n+\t\tgoto close;\n \t}\n \n \treturn fd;\n+close:\n+\tsave_errno_close(fd);\n+\treturn -1;\n }\n \n int connect_to_addr_str(int family, int type, const char *addr_str, __u16 port,\n"
}
2/1 2026/07/11 14:31 agent patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a userspace test helper file (tools/testing/selftests/bpf/network_helpers.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

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).

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

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


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

Prompt: 
For your convenience, here is the diff of the changes:
commit e15af753378736622d5d06d153bdb391796a0e54
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Jul 11 14:31:02 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c
index db935a9d9fc1a1..43c9e215c3f148 100644
--- a/tools/testing/selftests/bpf/network_helpers.c
+++ b/tools/testing/selftests/bpf/network_helpers.c
@@ -14,6 +14,7 @@
 #include <sys/types.h>
 #include <sys/un.h>
 #include <sys/eventfd.h>
+#include <sys/poll.h>
 
 #include <linux/err.h>
 #include <linux/in.h>
@@ -40,6 +41,8 @@
 #define IPPROTO_MPTCP 262
 #endif
 
+#define CONNECTION_IN_PROGRESS_TIMEOUT_MS	3000
+
 #define clean_errno() (errno == 0 ? "None" : strerror(errno))
 #define log_err(MSG, ...) ({						\
 			int __save = errno;				\
@@ -294,7 +297,8 @@ int client_socket(int family, int type,
 int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t addrlen,
 		    const struct network_helper_opts *opts)
 {
-	int fd;
+	socklen_t errlen;
+	int fd, err;
 
 	if (!opts)
 		opts = &default_opts;
@@ -305,13 +309,42 @@ int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t add
 		return -1;
 	}
 
-	if (connect(fd, (const struct sockaddr *)addr, addrlen)) {
-		log_err("Failed to connect to server");
-		save_errno_close(fd);
-		return -1;
+	err = connect(fd, (const struct sockaddr *)addr, addrlen);
+	if (err && errno == EINPROGRESS) {
+		struct pollfd pfd = { .fd = fd, .events = POLLOUT };
+
+		err = 0;
+		err = poll(&pfd, 1, CONNECTION_IN_PROGRESS_TIMEOUT_MS);
+
+		if (err <= 0) {
+			if (err == 0) {
+				log_err("Connection timeout");
+				errno = ETIMEDOUT;
+			} else {
+				log_err("Failed to poll connection status");
+			}
+			goto close;
+		}
+
+		errlen = sizeof(err);
+		if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) < 0) {
+			log_err("Failed to getsockopt");
+			goto close;
+		}
+
+		if (err) {
+			log_err("Failed to connect to server");
+			errno = err;
+			goto close;
+		}
+	} else if (err) {
+		goto close;
 	}
 
 	return fd;
+close:
+	save_errno_close(fd);
+	return -1;
 }
 
 int connect_to_addr_str(int family, int type, const char *addr_str, __u16 port,

3/2 2026/07/11 14:31 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 2477
							output: 71
							thoughts: 131

Thoughts: 
**WorthFuzzing Decision**

Okay, let's process this. The diff targets `tools/testing/selftests/bpf/network_helpers.c`. My initial reaction is that this is a selftest, and not actual kernel code. Consequently, from a fuzzing perspective, it shouldn't introduce any new kernel vulnerabilities. Therefore, I'm leaning towards setting `WorthFuzzing` to `false`.

Just to be absolutely sure, I'll quickly re-examine the changes. Hmm, yes, it seems they're adding a timeout to a `connect` call using `poll`. Again, this is a userspace change within a test helper file. It doesn't modify kernel functionality at all.

Alright, I'm confident. I'm going to proceed with calling `set-results` and specifying `WorthFuzzing=false`.

4/2 2026/07/11 14:31 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a userspace test helper file (tools/testing/selftests/bpf/network_helpers.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies a userspace test helper file (tools/testing/selftests/bpf/network_helpers.c) and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}
LLM Calls Summary:
Total Calls Total Tokens Avg Tokens Total Duration (Seconds) Avg Duration (Seconds)
Tool Calls Summary:
Total Calls Total Duration (Seconds) Avg Duration (Seconds)