AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/06/30 15:01 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test to the openvswitch selftests in tools/testing/selftests/. It does not modify any core kernel logic or drivers.",
  "WorthFuzzing": false
}
1/1 2026/06/30 15:01 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit 9b294151ffbaa673eb30a7ba3e01fe63f4a1ca20\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Tue Jun 30 15:01:56 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh\nindex 2954245129a2f4..fef21eb4a129c8 100755\n--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh\n+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh\n@@ -32,6 +32,7 @@ tests=\"\n \tdec_ttl\t\t\t\t\tttl: dec_ttl decrements IP TTL\n \tflow_set\t\t\t\tflow-set: Flow modify\n \taction_set\t\t\t\tset: SET action rewrites fields\n+\ttrunc\t\t\t\t\ttrunc: output truncation\n \tpsample\t\t\t\t\tpsample: Sampling packets with psample\"\n \n info() {\n@@ -443,6 +444,71 @@ test_action_set() {\n \treturn 0\n }\n \n+test_trunc() {\n+\tsbx_add \"test_trunc\" || return $?\n+\tovs_add_dp \"test_trunc\" trunctest || return 1\n+\n+\tinfo \"create namespaces\"\n+\tfor ns in client server; do\n+\t\tovs_add_netns_and_veths \"test_trunc\" \"trunctest\" \"$ns\" \\\n+\t\t\t\"${ns:0:1}0\" \"${ns:0:1}1\" || return 1\n+\tdone\n+\n+\tip netns exec client ip addr add 10.0.0.1/24 dev c1\n+\tip netns exec client ip link set c1 up\n+\tip netns exec server ip addr add 10.0.0.2/24 dev s1\n+\tip netns exec server ip link set s1 up\n+\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1\n+\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0800),ipv4()' '2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1\n+\n+\tinfo \"verify connectivity without truncation\"\n+\tovs_sbx \"test_trunc\" ip netns exec client ping -c 1 -W 2 \\\n+\t\t10.0.0.2 || return 1\n+\n+\tovs_del_flows \"test_trunc\" trunctest\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1\n+\n+\tinfo \"add truncated forwarding flow\"\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0800),ipv4()' \\\n+\t\t'trunc(14),2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1\n+\n+\tinfo \"verify ping fails with truncation\"\n+\tovs_sbx \"test_trunc\" ip netns exec client ping -c 1 -W 2 \\\n+\t\t10.0.0.2 \u003e/dev/null 2\u003e\u00261 \\\n+\t\t\u0026\u0026 { info \"FAIL: ping should fail with trunc(14)\"\n+\t\t     return 1; }\n+\n+\tovs_del_flows \"test_trunc\" trunctest\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(1),eth(),eth_type(0x0800),ipv4()' '2' || return 1\n+\tovs_add_flow \"test_trunc\" trunctest \\\n+\t\t'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1\n+\n+\tinfo \"verify connectivity restored without truncation\"\n+\tovs_sbx \"test_trunc\" ip netns exec client ping -c 1 -W 2 \\\n+\t\t10.0.0.2 || return 1\n+\n+\treturn 0\n+}\n+\n # psample test\n # - use psample to observe packets\n test_psample() {\n"
}
2/1 2026/06/30 15:01 agent patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test to the openvswitch selftests in tools/testing/selftests/. It does not modify any core kernel logic or drivers.",
  "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 9b294151ffbaa673eb30a7ba3e01fe63f4a1ca20
Author: syz-cluster <triage@syzkaller.com>
Date:   Tue Jun 30 15:01:56 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh
index 2954245129a2f4..fef21eb4a129c8 100755
--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh
+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh
@@ -32,6 +32,7 @@ tests="
 	dec_ttl					ttl: dec_ttl decrements IP TTL
 	flow_set				flow-set: Flow modify
 	action_set				set: SET action rewrites fields
+	trunc					trunc: output truncation
 	psample					psample: Sampling packets with psample"
 
 info() {
@@ -443,6 +444,71 @@ test_action_set() {
 	return 0
 }
 
+test_trunc() {
+	sbx_add "test_trunc" || return $?
+	ovs_add_dp "test_trunc" trunctest || return 1
+
+	info "create namespaces"
+	for ns in client server; do
+		ovs_add_netns_and_veths "test_trunc" "trunctest" "$ns" \
+			"${ns:0:1}0" "${ns:0:1}1" || return 1
+	done
+
+	ip netns exec client ip addr add 10.0.0.1/24 dev c1
+	ip netns exec client ip link set c1 up
+	ip netns exec server ip addr add 10.0.0.2/24 dev s1
+	ip netns exec server ip link set s1 up
+
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
+
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0800),ipv4()' '2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1
+
+	info "verify connectivity without truncation"
+	ovs_sbx "test_trunc" ip netns exec client ping -c 1 -W 2 \
+		10.0.0.2 || return 1
+
+	ovs_del_flows "test_trunc" trunctest
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
+
+	info "add truncated forwarding flow"
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0800),ipv4()' \
+		'trunc(14),2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1
+
+	info "verify ping fails with truncation"
+	ovs_sbx "test_trunc" ip netns exec client ping -c 1 -W 2 \
+		10.0.0.2 >/dev/null 2>&1 \
+		&& { info "FAIL: ping should fail with trunc(14)"
+		     return 1; }
+
+	ovs_del_flows "test_trunc" trunctest
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(1),eth(),eth_type(0x0800),ipv4()' '2' || return 1
+	ovs_add_flow "test_trunc" trunctest \
+		'in_port(2),eth(),eth_type(0x0800),ipv4()' '1' || return 1
+
+	info "verify connectivity restored without truncation"
+	ovs_sbx "test_trunc" ip netns exec client ping -c 1 -W 2 \
+		10.0.0.2 || return 1
+
+	return 0
+}
+
 # psample test
 # - use psample to observe packets
 test_psample() {

3/2 2026/06/30 15:01 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 2978
							output: 66
							thoughts: 118

Thoughts: 
**Analyzing the Openvswitch Test Patch**

Okay, so I've got this patch here that's touching the `openvswitch.sh` script, specifically within the selftests directory. My initial thought is this is just a test addition, a `test_trunc` for Open vSwitch. It's a selftest modification, which, from what I know, doesn't directly impact the core kernel functionality. Therefore, based on that, the `WorthFuzzing` flag should absolutely be set to false.

Let me just double-check to make sure I'm not missing anything crucial here. Yep, still only the `openvswitch.sh` script. There's zero modification to any actual kernel source code. So, yeah, I'm confident in saying the `WorthFuzzing` value here should unequivocally be set to false. No need to include this in the fuzzing process based on this change.

4/2 2026/06/30 15:02 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test to the openvswitch selftests in tools/testing/selftests/. It does not modify any core kernel logic or drivers.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test to the openvswitch selftests in tools/testing/selftests/. It does not modify any core kernel logic or drivers.",
  "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)