AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/13 22:35 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds audit logging for the move_mount system call. It does not alter any core execution flow or functional logic.",
  "WorthFuzzing": false
}
1/1 2026/07/13 22:35 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit a0c6ee2eb5189cc0d4a9b284a26871e9ebe677cf\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Jul 13 22:35:36 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/fs/namespace.c b/fs/namespace.c\nindex 3d5cd5bf3b0537..a6b0286744d9ac 100644\n--- a/fs/namespace.c\n+++ b/fs/namespace.c\n@@ -34,6 +34,7 @@\n #include \u003clinux/mnt_idmapping.h\u003e\n #include \u003clinux/pidfs.h\u003e\n #include \u003clinux/nstree.h\u003e\n+#include \u003clinux/audit.h\u003e\n \n #include \"pnode.h\"\n #include \"internal.h\"\n@@ -4625,6 +4626,8 @@ SYSCALL_DEFINE5(move_mount,\n \tif (flags \u0026 MOVE_MOUNT_F_EMPTY_PATH)\n \t\tuflags = AT_EMPTY_PATH;\n \n+\taudit_log_move_mount(flags);\n+\n \tCLASS(filename_maybe_null,from_name)(from_pathname, uflags);\n \tif (!from_name \u0026\u0026 from_dfd \u003e= 0) {\n \t\tCLASS(fd_raw, f_from)(from_dfd);\ndiff --git a/include/linux/audit.h b/include/linux/audit.h\nindex 45abb3722d304c..d1dc4035cb3c36 100644\n--- a/include/linux/audit.h\n+++ b/include/linux/audit.h\n@@ -449,6 +449,7 @@ extern void __audit_tk_injoffset(struct timespec64 offset);\n extern void __audit_ntp_log(const struct audit_ntp_data *ad);\n extern void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries,\n \t\t\t      enum audit_nfcfgop op, gfp_t gfp);\n+extern void __audit_log_move_mount(unsigned int flags);\n \n static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)\n {\n@@ -598,6 +599,12 @@ static inline void audit_log_nfcfg(const char *name, u8 af,\n \t\t__audit_log_nfcfg(name, af, nentries, op, gfp);\n }\n \n+static inline void audit_log_move_mount(unsigned int flags)\n+{\n+\tif (!audit_dummy_context())\n+\t\t__audit_log_move_mount(flags);\n+}\n+\n extern int audit_n_rules;\n extern int audit_signals;\n #else /* CONFIG_AUDITSYSCALL */\n@@ -730,6 +737,9 @@ static inline void audit_log_nfcfg(const char *name, u8 af,\n \t\t\t\t   enum audit_nfcfgop op, gfp_t gfp)\n { }\n \n+static inline void audit_log_move_mount(unsigned int flags)\n+{ }\n+\n #define audit_n_rules 0\n #define audit_signals 0\n #endif /* CONFIG_AUDITSYSCALL */\ndiff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h\nindex e8f5ce677df734..40abf3dfd307e7 100644\n--- a/include/uapi/linux/audit.h\n+++ b/include/uapi/linux/audit.h\n@@ -122,6 +122,7 @@\n #define AUDIT_OPENAT2\t\t1337\t/* Record showing openat2 how args */\n #define AUDIT_DM_CTRL\t\t1338\t/* Device Mapper target control */\n #define AUDIT_DM_EVENT\t\t1339\t/* Device Mapper events */\n+#define AUDIT_MOVE_MOUNT\t1342\t/* Record showing move_mount flags */\n \n #define AUDIT_AVC\t\t1400\t/* SE Linux avc denial or grant */\n #define AUDIT_SELINUX_ERR\t1401\t/* Internal SE Linux Errors */\ndiff --git a/kernel/auditsc.c b/kernel/auditsc.c\nindex 6610e667c728aa..4aca04d33d0044 100644\n--- a/kernel/auditsc.c\n+++ b/kernel/auditsc.c\n@@ -2882,6 +2882,19 @@ void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries,\n }\n EXPORT_SYMBOL_GPL(__audit_log_nfcfg);\n \n+void __audit_log_move_mount(unsigned int flags)\n+{\n+\tstruct audit_buffer *ab;\n+\n+\tab = audit_log_start(audit_context(), GFP_KERNEL,\n+\t\t\t     AUDIT_MOVE_MOUNT);\n+\tif (!ab)\n+\t\treturn;\n+\n+\taudit_log_format(ab, \"fs_flags=0x%x\", flags);\n+\taudit_log_end(ab);\n+}\n+\n static void audit_log_task(struct audit_buffer *ab)\n {\n \tkuid_t auid, uid;\n"
}
2/1 2026/07/13 22:35 agent patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds audit logging for the move_mount system call. It does not alter any core execution flow or functional logic.",
  "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 a0c6ee2eb5189cc0d4a9b284a26871e9ebe677cf
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Jul 13 22:35:36 2026 +0000

    syz-cluster: applied patch under review

diff --git a/fs/namespace.c b/fs/namespace.c
index 3d5cd5bf3b0537..a6b0286744d9ac 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -34,6 +34,7 @@
 #include <linux/mnt_idmapping.h>
 #include <linux/pidfs.h>
 #include <linux/nstree.h>
+#include <linux/audit.h>
 
 #include "pnode.h"
 #include "internal.h"
@@ -4625,6 +4626,8 @@ SYSCALL_DEFINE5(move_mount,
 	if (flags & MOVE_MOUNT_F_EMPTY_PATH)
 		uflags = AT_EMPTY_PATH;
 
+	audit_log_move_mount(flags);
+
 	CLASS(filename_maybe_null,from_name)(from_pathname, uflags);
 	if (!from_name && from_dfd >= 0) {
 		CLASS(fd_raw, f_from)(from_dfd);
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 45abb3722d304c..d1dc4035cb3c36 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -449,6 +449,7 @@ extern void __audit_tk_injoffset(struct timespec64 offset);
 extern void __audit_ntp_log(const struct audit_ntp_data *ad);
 extern void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries,
 			      enum audit_nfcfgop op, gfp_t gfp);
+extern void __audit_log_move_mount(unsigned int flags);
 
 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
 {
@@ -598,6 +599,12 @@ static inline void audit_log_nfcfg(const char *name, u8 af,
 		__audit_log_nfcfg(name, af, nentries, op, gfp);
 }
 
+static inline void audit_log_move_mount(unsigned int flags)
+{
+	if (!audit_dummy_context())
+		__audit_log_move_mount(flags);
+}
+
 extern int audit_n_rules;
 extern int audit_signals;
 #else /* CONFIG_AUDITSYSCALL */
@@ -730,6 +737,9 @@ static inline void audit_log_nfcfg(const char *name, u8 af,
 				   enum audit_nfcfgop op, gfp_t gfp)
 { }
 
+static inline void audit_log_move_mount(unsigned int flags)
+{ }
+
 #define audit_n_rules 0
 #define audit_signals 0
 #endif /* CONFIG_AUDITSYSCALL */
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index e8f5ce677df734..40abf3dfd307e7 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -122,6 +122,7 @@
 #define AUDIT_OPENAT2		1337	/* Record showing openat2 how args */
 #define AUDIT_DM_CTRL		1338	/* Device Mapper target control */
 #define AUDIT_DM_EVENT		1339	/* Device Mapper events */
+#define AUDIT_MOVE_MOUNT	1342	/* Record showing move_mount flags */
 
 #define AUDIT_AVC		1400	/* SE Linux avc denial or grant */
 #define AUDIT_SELINUX_ERR	1401	/* Internal SE Linux Errors */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 6610e667c728aa..4aca04d33d0044 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2882,6 +2882,19 @@ void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries,
 }
 EXPORT_SYMBOL_GPL(__audit_log_nfcfg);
 
+void __audit_log_move_mount(unsigned int flags)
+{
+	struct audit_buffer *ab;
+
+	ab = audit_log_start(audit_context(), GFP_KERNEL,
+			     AUDIT_MOVE_MOUNT);
+	if (!ab)
+		return;
+
+	audit_log_format(ab, "fs_flags=0x%x", flags);
+	audit_log_end(ab);
+}
+
 static void audit_log_task(struct audit_buffer *ab)
 {
 	kuid_t auid, uid;

3/2 2026/07/13 22:35 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 2890
							output: 57
							thoughts: 236

Thoughts: 
**Analyzing the Proposed Patch for Fuzzing Worthiness**

Okay, so this patch introduces an audit log for the `move_mount` system call. I see it's touching `fs/namespace.c` to call `audit_log_move_mount(flags)`, then it defines the function `__audit_log_move_mount` in `kernel/auditsc.c`, and adds a corresponding entry, `AUDIT_MOVE_MOUNT`, in `include/uapi/linux/audit.h`. Straightforward enough.

The crucial thing here is that this seems to be a *purely* logging-related change. It's an audit log, not a functional modification to the `move_mount` syscall itself. The instructions are pretty clear on this: if the patch only deals with documentation, Kconfig, comments, or "purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints," then `WorthFuzzing` should be `false`.

Let me just quickly confirm that the logging function doesn't actually alter the `move_mount`'s behavior. Right, `audit_log_move_mount` is simply formatting the flags and logging them. There are no fundamental changes to the `move_mount` code path itself.

Therefore, I'm confident in setting `WorthFuzzing` to `false`. I will proceed to call `set-results` accordingly.

4/2 2026/07/13 22:35 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds audit logging for the move_mount system call. It does not alter any core execution flow or functional logic.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds audit logging for the move_mount system call. It does not alter any core execution flow or functional logic.",
  "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)