| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/09/10 01:03 | flow | patch-triage |
0mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The patch only modifies Documentation/netlink/specs/conntrack.yaml, which is documentation / user-space netlink schema. It does not modify any executable kernel code.",
"WorthFuzzing": false
} |
| 1/1 | 2026/09/10 01:03 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 3bdb103648fdbaccab26d69215c2d43d69b139d8\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Thu Sep 10 01:03:32 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/Documentation/netlink/specs/conntrack.yaml b/Documentation/netlink/specs/conntrack.yaml\nindex b1eb102ab8432..1d163130241a7 100644\n--- a/Documentation/netlink/specs/conntrack.yaml\n+++ b/Documentation/netlink/specs/conntrack.yaml\n@@ -72,14 +72,14 @@ definitions:\n type: enum\n entries:\n - none\n- - cloned\n+ - closed\n - cookie-wait\n - cookie-echoed\n - established\n - shutdown-sent\n- - shutdown-received\n+ - shutdown-recd\n - shutdown-ack-sent\n- - shutdown-heartbeat-sent\n+ - heartbeat-sent\n -\n name: nf-ct-status\n type: flags\n@@ -116,9 +116,11 @@ attribute-sets:\n -\n name: packets-old\n type: u32\n+ doc: obsolete\n -\n name: bytes-old\n type: u32\n+ doc: obsolete\n -\n name: pad\n type: pad\n@@ -292,6 +294,12 @@ attribute-sets:\n name: help-name\n type: string\n doc: helper name\n+ -\n+ name: help-info\n+ type: binary\n+ doc: \u003e-\n+ Private data of a user space helper, only present for helpers\n+ registered via nfnetlink_cthelper with a non-zero data length.\n -\n name: nat-proto-attrs\n attributes:\n@@ -314,16 +322,16 @@ attribute-sets:\n name: nat-v4-maxip\n type: u32\n byte-order: big-endian\n+ -\n+ name: nat-proto\n+ type: nest\n+ nested-attributes: nat-proto-attrs\n -\n name: nat-v6-minip\n type: binary\n -\n name: nat-v6-maxip\n type: binary\n- -\n- name: nat-proto\n- type: nest\n- nested-attributes: nat-proto-attrs\n -\n name: seqadj-attrs\n attributes:\n@@ -345,6 +353,20 @@ attribute-sets:\n -\n name: secctx-name\n type: string\n+ -\n+ name: timestamp-attrs\n+ attributes:\n+ -\n+ name: start\n+ type: u64\n+ byte-order: big-endian\n+ -\n+ name: stop\n+ type: u64\n+ byte-order: big-endian\n+ -\n+ name: pad\n+ type: pad\n -\n name: synproxy-attrs\n attributes:\n@@ -445,7 +467,7 @@ attribute-sets:\n nested-attributes: seqadj-attrs\n -\n name: secmark\n- type: binary\n+ type: u32\n doc: obsolete\n -\n name: zone\n@@ -458,8 +480,8 @@ attribute-sets:\n nested-attributes: secctx-attrs\n -\n name: timestamp\n- type: u64\n- byte-order: big-endian\n+ type: nest\n+ nested-attributes: timestamp-attrs\n -\n name: mark-mask\n type: u32\n@@ -510,7 +532,7 @@ attribute-sets:\n name: invalid\n type: u32\n byte-order: big-endian\n- doc: obsolete\n+ doc: packets which could not be tracked\n -\n name: ignore\n type: u32\n@@ -582,20 +604,18 @@ operations:\n - status\n - protoinfo\n - help\n- - nat-src\n- - nat-dst\n - timeout\n - mark\n - counters-orig\n - counters-reply\n - use\n - id\n- - nat-dst\n - tuple-master\n - seq-adj-orig\n - seq-adj-reply\n - zone\n - secctx\n+ - timestamp\n - labels\n - synproxy\n dump:\n@@ -618,20 +638,18 @@ operations:\n - status\n - protoinfo\n - help\n- - nat-src\n- - nat-dst\n - timeout\n - mark\n - counters-orig\n - counters-reply\n - use\n - id\n- - nat-dst\n - tuple-master\n - seq-adj-orig\n - seq-adj-reply\n - zone\n - secctx\n+ - timestamp\n - labels\n - synproxy\n -\n@@ -645,8 +663,8 @@ operations:\n reply:\n value: 0x104\n attributes:\n- - searched\n - found\n+ - invalid\n - insert\n - insert-failed\n - drop\n"
} |
| 2/1 | 2026/09/10 01:03 | agent | patch-evaluator |
0mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch only modifies Documentation/netlink/specs/conntrack.yaml, which is documentation / user-space netlink schema. It does not modify any executable kernel code.",
"WorthFuzzing": false
}Instruction: You are an expert Linux kernel maintainer and security engineer.
Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller.
IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on internal assumptions. You must actively use your code access
tools to inspect the actual source code, callers, and surrounding context.
================================================================================
1. CORE TRIAGE PHILOSOPHY
================================================================================
The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs,
and newly triggered assertions introduced by the patch series.
- REACHABILITY IS THE PRIMARY GATE:
Fuzzing can only discover bugs in code that can actually execute in standard virtualized
environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap).
If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed,
regardless of whether it adds assertions or complex logic.
- DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS:
Patch authors routinely label changes as "cleanups", "refactorings", or state
"No functional change intended". Do NOT take these claims at face value.
Code refactorings that rearrange logic, introduce helper functions, or alter state management
in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs.
If reachable executable code is modified or refactored, it MUST be fuzzed.
- NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED:
When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON*, VM_WARN_ON*,
BUG_ON*, lockdep_assert*) in reachable code paths, it enforces new or stricter invariants.
Even if the author believes the invariant always holds, fuzzing is essential to verify whether
an unusual sequence of operations can violate it.
================================================================================
2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA)
================================================================================
Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories:
- Non-kernel and non-executable changes:
* Modifications to Documentation/, comments, or spelling fixes.
* User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/)
that do not affect the compiled kernel image (vmlinux) or kernel modules.
* Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints
that do not alter control flow or data structures.
* Build system or Kconfig changes that do not alter compiled C logic.
- Structurally unreachable hardware:
* Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed,
ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU.
- Unreachable execution paths:
* Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during
physical PCI hot-unplug or manual sysfs driver unbinding.
* Code paths exclusive to architectures other than the target architecture.
================================================================================
3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA)
================================================================================
Return WorthFuzzing=true whenever the patch touches reachable executable code, including:
- Core Subsystems:
* Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/),
BPF, scheduler, core networking, VFS, or syscall handling.
- Refactorings and Code Cleanups:
* Any restructuring of reachable data structures, helper abstractions, or algorithm flows.
- Runtime Assertions and Defensive Checks:
* Any introduction or alteration of assertions (WARN_ON*, VM_WARN_ON*, BUG_ON*, etc.) in reachable paths.
- Reachable Drivers and Protocols:
* Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.).
================================================================================
4. EXTRACTING FocusSymbols (PREVENTING DILUTION)
================================================================================
When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer:
- AVOID UBIQUITOUS LIFECYCLE HOT-PATHS:
Do NOT list generic, ubiquitous functions called by almost every program in the corpus
(including, but not limited to: general memory allocators and deallocators, page fault
and trap handlers, or core synchronization primitives; this is not an exhaustive list).
Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused",
which severely dilutes fuzzing effort away from the actual changes.
- TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS:
List functions that specifically implement the logic being added or altered, or direct API entrypoints
for the subsystem feature under review.
- HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h):
Compiler-inlined static functions (such as static inlines in mm/*.h or include/linux/*.h) lack
distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters.
If the changes are primarily in static inline helpers, identify non-static, feature-specific caller
functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers).
================================================================================
5. IDENTIFYING EnableConfigs
================================================================================
Identify any specific CONFIG_ options required to properly compile and reach the modified code:
- Inspect Kconfig files and #ifdef guards; do not make assumptions.
- Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed.
- Strip any '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: Target architecture: amd64
For your convenience, here is the diff of the changes:
commit 3bdb103648fdbaccab26d69215c2d43d69b139d8
Author: syz-cluster <triage@syzkaller.com>
Date: Thu Sep 10 01:03:32 2026 +0000
syz-cluster: applied patch under review
diff --git a/Documentation/netlink/specs/conntrack.yaml b/Documentation/netlink/specs/conntrack.yaml
index b1eb102ab8432..1d163130241a7 100644
--- a/Documentation/netlink/specs/conntrack.yaml
+++ b/Documentation/netlink/specs/conntrack.yaml
@@ -72,14 +72,14 @@ definitions:
type: enum
entries:
- none
- - cloned
+ - closed
- cookie-wait
- cookie-echoed
- established
- shutdown-sent
- - shutdown-received
+ - shutdown-recd
- shutdown-ack-sent
- - shutdown-heartbeat-sent
+ - heartbeat-sent
-
name: nf-ct-status
type: flags
@@ -116,9 +116,11 @@ attribute-sets:
-
name: packets-old
type: u32
+ doc: obsolete
-
name: bytes-old
type: u32
+ doc: obsolete
-
name: pad
type: pad
@@ -292,6 +294,12 @@ attribute-sets:
name: help-name
type: string
doc: helper name
+ -
+ name: help-info
+ type: binary
+ doc: >-
+ Private data of a user space helper, only present for helpers
+ registered via nfnetlink_cthelper with a non-zero data length.
-
name: nat-proto-attrs
attributes:
@@ -314,16 +322,16 @@ attribute-sets:
name: nat-v4-maxip
type: u32
byte-order: big-endian
+ -
+ name: nat-proto
+ type: nest
+ nested-attributes: nat-proto-attrs
-
name: nat-v6-minip
type: binary
-
name: nat-v6-maxip
type: binary
- -
- name: nat-proto
- type: nest
- nested-attributes: nat-proto-attrs
-
name: seqadj-attrs
attributes:
@@ -345,6 +353,20 @@ attribute-sets:
-
name: secctx-name
type: string
+ -
+ name: timestamp-attrs
+ attributes:
+ -
+ name: start
+ type: u64
+ byte-order: big-endian
+ -
+ name: stop
+ type: u64
+ byte-order: big-endian
+ -
+ name: pad
+ type: pad
-
name: synproxy-attrs
attributes:
@@ -445,7 +467,7 @@ attribute-sets:
nested-attributes: seqadj-attrs
-
name: secmark
- type: binary
+ type: u32
doc: obsolete
-
name: zone
@@ -458,8 +480,8 @@ attribute-sets:
nested-attributes: secctx-attrs
-
name: timestamp
- type: u64
- byte-order: big-endian
+ type: nest
+ nested-attributes: timestamp-attrs
-
name: mark-mask
type: u32
@@ -510,7 +532,7 @@ attribute-sets:
name: invalid
type: u32
byte-order: big-endian
- doc: obsolete
+ doc: packets which could not be tracked
-
name: ignore
type: u32
@@ -582,20 +604,18 @@ operations:
- status
- protoinfo
- help
- - nat-src
- - nat-dst
- timeout
- mark
- counters-orig
- counters-reply
- use
- id
- - nat-dst
- tuple-master
- seq-adj-orig
- seq-adj-reply
- zone
- secctx
+ - timestamp
- labels
- synproxy
dump:
@@ -618,20 +638,18 @@ operations:
- status
- protoinfo
- help
- - nat-src
- - nat-dst
- timeout
- mark
- counters-orig
- counters-reply
- use
- id
- - nat-dst
- tuple-master
- seq-adj-orig
- seq-adj-reply
- zone
- secctx
+ - timestamp
- labels
- synproxy
-
@@ -645,8 +663,8 @@ operations:
reply:
value: 0x104
attributes:
- - searched
- found
+ - invalid
- insert
- insert-failed
- drop
|
| 3/2 | 2026/09/10 01:03 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 3918 output: 19 thoughts: 238 Thoughts: **My Initial Assessment of the Conntrack.yaml Commit** Okay, so I've been asked to review a commit that touches `Documentation/netlink/specs/conntrack.yaml`. My first instinct is to take a close look at the diff. Since it looks like *only* that one file was modified, my next thought is, "does this fall under the 'no-fuss' category?" Specifically, I need to see if it aligns with section 2 of our guidelines. Let me refresh my memory of those instructions. Ah, yes: "Non-kernel and non-executable changes..." that covers things like documentation updates, comments, spelling fixes, user-space tools, and certain types of logging/tracepoints that don't impact kernel behavior. The key here is *not* affecting the compiled kernel image or kernel modules. I need to confirm that this change indeed falls into this category. It seems likely, given it's documentation, but I need to be sure there isn't some hidden implication or some strange build process that incorporates these specs into something that actually gets compiled. So, let me quickly double-check – I'll use `grepper` or check the git status/diff again to be absolutely certain there are no other, potentially concerning, files involved. This is a quick sanity check to avoid a potentially missed issue. My gut says this is straightforward, but I need solid evidence before I'm comfortable signing off. |
| 4/2 | 2026/09/10 01:03 | tool | grepper |
0mError:no matches Args: {
"Expression": "conntrack.yaml"
}Results: {
"error": "no matches"
} |
| 5/2 | 2026/09/10 01:03 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 4493 output: 68 thoughts: 197 Thoughts: **My Assessment of the Netlink Specification Change** Okay, so I've been reviewing this patch, and my initial impression is straightforward. The changes are confined to `Documentation/netlink/specs/`, specifically the Netlink spec YAML files. These are the user-space facing specifications, used by tools like `ynl` and `libynl` – think of them as the interface documentation rather than the underlying kernel implementation. They're not compiled into the kernel itself. Given that, section 2 of the "Return WorthFuzzing" criteria is pretty clear. The documentation edits fall squarely into the "Non-kernel and non-executable changes" category. This means we're dealing with modifications to documentation, specifically a YAML spec file. Nothing here touches the actual kernel C code. Therefore, my `set-results` call will reflect that: `WorthFuzzing = false`. I'll set `EnableConfigs` and `FocusSymbols` to empty lists as they are irrelevant in this scenario, and the `Reasoning` will be: "The patch exclusively modifies Documentation/netlink/specs/conntrack.yaml, which is a YAML specification file for user-space Netlink tooling and documentation. It does not introduce or alter any executable kernel C code or compiled kernel objects." This should be a clean, non-disruptive change. |
| 6/2 | 2026/09/10 01:03 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The patch only modifies Documentation/netlink/specs/conntrack.yaml, which is documentation / user-space netlink schema. It does not modify any executable kernel code.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch only modifies Documentation/netlink/specs/conntrack.yaml, which is documentation / user-space netlink schema. It does not modify any executable kernel code.",
"WorthFuzzing": false
} |
| 7/1 | 2026/09/10 01:03 | action | If |
0mArgs:{
"WorthFuzzing": false
}Results: null |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|