AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/07 11:32 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test script and modifies a python script in the tools/testing/selftests/ directory. It does not modify any kernel source code, so there is no new kernel logic to fuzz.",
  "WorthFuzzing": false
}
1/1 2026/07/07 11:32 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit 384bae7c6b24ecca1a6ce69e65984820ab2f922b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Tue Jul 7 11:32:21 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..9c364eeb2ec271 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+\tsctp_connect_v4\t\t\t\tsctp: SCTP flow key matching\n \tpsample\t\t\t\t\tpsample: Sampling packets with psample\"\n \n info() {\n@@ -443,6 +444,107 @@ test_action_set() {\n \treturn 0\n }\n \n+# sctp_connect_v4 test\n+# - sctp(dst=4443) matches client-to-server INIT\n+# - sctp(src=4443) matches server-to-client INIT-ACK\n+# - remove flows and verify connection fails, reinstall and recover\n+test_sctp_connect_v4() {\n+\tlocal t=\"test_sctp_connect_v4\"\n+\n+\twhich ncat \u003e/dev/null 2\u003e\u00261 || return $ksft_skip\n+\tmodprobe -q sctp 2\u003e/dev/null || return $ksft_skip\n+\n+\tsbx_add \"$t\" || return $?\n+\tovs_add_dp \"$t\" sctp4 || return 1\n+\n+\tinfo \"create namespaces\"\n+\tfor ns in client server; do\n+\t\tovs_add_netns_and_veths \"$t\" \"sctp4\" \"$ns\" \\\n+\t\t    \"${ns:0:1}0\" \"${ns:0:1}1\" || return 1\n+\tdone\n+\n+\tip netns exec client ip addr add 172.31.110.10/24 dev c1\n+\tip netns exec client ip link set c1 up\n+\tip netns exec server ip addr add 172.31.110.20/24 dev s1\n+\tip netns exec server ip link set s1 up\n+\n+\t# ARP forwarding\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(1),eth(),eth_type(0x0806),arp()' \\\n+\t    '2' || return 1\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(2),eth(),eth_type(0x0806),arp()' \\\n+\t    '1' || return 1\n+\n+\t# SCTP port matching: dst for request, src for reply\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(1),eth(),eth_type(0x0800),ipv4(proto=132),sctp(dst=4443)' \\\n+\t    '2' || return 1\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(2),eth(),eth_type(0x0800),ipv4(proto=132),sctp(src=4443)' \\\n+\t    '1' || return 1\n+\n+\techo \"server\" | \\\n+\t\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t\t\t\tncat --sctp -l 172.31.110.20 -vn 4443\n+\tlocal server_pid=$pid\n+\tovs_wait sh -c \\\n+\t    \"[ \\$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 1 ]\" \\\n+\t    || return 1\n+\n+\tinfo \"verify SCTP association with port-keyed flows\"\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    ncat --sctp -i 1 -zv 172.31.110.20 4443 \\\n+\t    || return 1\n+\n+\tovs_del_flows \"$t\" sctp4\n+\n+\tinfo \"verify connection fails without flows\"\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(1),eth(),eth_type(0x0806),arp()' \\\n+\t    '2' || return 1\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(2),eth(),eth_type(0x0806),arp()' \\\n+\t    '1' || return 1\n+\n+\tkill -TERM $server_pid 2\u003e/dev/null\n+\techo \"server2\" | \\\n+\t\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t\t\t\tncat --sctp -l 172.31.110.20 -vn 4443\n+\tserver_pid=$pid\n+\tovs_wait sh -c \\\n+\t    \"[ \\$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 2 ]\" \\\n+\t    || return 1\n+\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    ncat --sctp -w 2 -zv 172.31.110.20 4443 \\\n+\t    \u003e/dev/null 2\u003e\u00261 \\\n+\t    \u0026\u0026 { info \"FAIL: connection should fail without flows\"\n+\t         return 1; }\n+\n+\tinfo \"reinstall flows and verify recovery\"\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(1),eth(),eth_type(0x0800),ipv4(proto=132),sctp(dst=4443)' \\\n+\t    '2' || return 1\n+\tovs_add_flow \"$t\" sctp4 \\\n+\t    'in_port(2),eth(),eth_type(0x0800),ipv4(proto=132),sctp(src=4443)' \\\n+\t    '1' || return 1\n+\n+\tkill -TERM $server_pid 2\u003e/dev/null\n+\techo \"server3\" | \\\n+\t\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t\t\t\tncat --sctp -l 172.31.110.20 -vn 4443\n+\tovs_wait sh -c \\\n+\t    \"[ \\$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 3 ]\" \\\n+\t    || return 1\n+\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    ncat --sctp -i 1 -zv 172.31.110.20 4443 \\\n+\t    || return 1\n+\n+\treturn 0\n+}\n+\n # psample test\n # - use psample to observe packets\n test_psample() {\ndiff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\nindex e1ecfad2c03e37..7cfc29ec7e5931 100644\n--- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\n+++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py\n@@ -1982,6 +1982,11 @@ class ovskey(nla):\n                 \"icmp\",\n                 ovskey.ovs_key_icmp,\n             ),\n+            (\n+                \"OVS_KEY_ATTR_SCTP\",\n+                \"sctp\",\n+                ovskey.ovs_key_sctp,\n+            ),\n             (\n                 \"OVS_KEY_ATTR_TCP_FLAGS\",\n                 \"tcp_flags\",\n"
}
2/1 2026/07/07 11:32 agent patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test script and modifies a python script in the tools/testing/selftests/ directory. It does not modify any kernel source code, so there is no new kernel logic to fuzz.",
  "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 384bae7c6b24ecca1a6ce69e65984820ab2f922b
Author: syz-cluster <triage@syzkaller.com>
Date:   Tue Jul 7 11:32:21 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..9c364eeb2ec271 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
+	sctp_connect_v4				sctp: SCTP flow key matching
 	psample					psample: Sampling packets with psample"
 
 info() {
@@ -443,6 +444,107 @@ test_action_set() {
 	return 0
 }
 
+# sctp_connect_v4 test
+# - sctp(dst=4443) matches client-to-server INIT
+# - sctp(src=4443) matches server-to-client INIT-ACK
+# - remove flows and verify connection fails, reinstall and recover
+test_sctp_connect_v4() {
+	local t="test_sctp_connect_v4"
+
+	which ncat >/dev/null 2>&1 || return $ksft_skip
+	modprobe -q sctp 2>/dev/null || return $ksft_skip
+
+	sbx_add "$t" || return $?
+	ovs_add_dp "$t" sctp4 || return 1
+
+	info "create namespaces"
+	for ns in client server; do
+		ovs_add_netns_and_veths "$t" "sctp4" "$ns" \
+		    "${ns:0:1}0" "${ns:0:1}1" || return 1
+	done
+
+	ip netns exec client ip addr add 172.31.110.10/24 dev c1
+	ip netns exec client ip link set c1 up
+	ip netns exec server ip addr add 172.31.110.20/24 dev s1
+	ip netns exec server ip link set s1 up
+
+	# ARP forwarding
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(1),eth(),eth_type(0x0806),arp()' \
+	    '2' || return 1
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(2),eth(),eth_type(0x0806),arp()' \
+	    '1' || return 1
+
+	# SCTP port matching: dst for request, src for reply
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(1),eth(),eth_type(0x0800),ipv4(proto=132),sctp(dst=4443)' \
+	    '2' || return 1
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(2),eth(),eth_type(0x0800),ipv4(proto=132),sctp(src=4443)' \
+	    '1' || return 1
+
+	echo "server" | \
+		ovs_netns_spawn_daemon "$t" "server" \
+				ncat --sctp -l 172.31.110.20 -vn 4443
+	local server_pid=$pid
+	ovs_wait sh -c \
+	    "[ \$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 1 ]" \
+	    || return 1
+
+	info "verify SCTP association with port-keyed flows"
+	ovs_sbx "$t" ip netns exec client \
+	    ncat --sctp -i 1 -zv 172.31.110.20 4443 \
+	    || return 1
+
+	ovs_del_flows "$t" sctp4
+
+	info "verify connection fails without flows"
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(1),eth(),eth_type(0x0806),arp()' \
+	    '2' || return 1
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(2),eth(),eth_type(0x0806),arp()' \
+	    '1' || return 1
+
+	kill -TERM $server_pid 2>/dev/null
+	echo "server2" | \
+		ovs_netns_spawn_daemon "$t" "server" \
+				ncat --sctp -l 172.31.110.20 -vn 4443
+	server_pid=$pid
+	ovs_wait sh -c \
+	    "[ \$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 2 ]" \
+	    || return 1
+
+	ovs_sbx "$t" ip netns exec client \
+	    ncat --sctp -w 2 -zv 172.31.110.20 4443 \
+	    >/dev/null 2>&1 \
+	    && { info "FAIL: connection should fail without flows"
+	         return 1; }
+
+	info "reinstall flows and verify recovery"
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(1),eth(),eth_type(0x0800),ipv4(proto=132),sctp(dst=4443)' \
+	    '2' || return 1
+	ovs_add_flow "$t" sctp4 \
+	    'in_port(2),eth(),eth_type(0x0800),ipv4(proto=132),sctp(src=4443)' \
+	    '1' || return 1
+
+	kill -TERM $server_pid 2>/dev/null
+	echo "server3" | \
+		ovs_netns_spawn_daemon "$t" "server" \
+				ncat --sctp -l 172.31.110.20 -vn 4443
+	ovs_wait sh -c \
+	    "[ \$(grep -c 'Ncat: Listening' ${ovs_dir}/stderr) -ge 3 ]" \
+	    || return 1
+
+	ovs_sbx "$t" ip netns exec client \
+	    ncat --sctp -i 1 -zv 172.31.110.20 4443 \
+	    || return 1
+
+	return 0
+}
+
 # psample test
 # - use psample to observe packets
 test_psample() {
diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
index e1ecfad2c03e37..7cfc29ec7e5931 100644
--- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
+++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
@@ -1982,6 +1982,11 @@ class ovskey(nla):
                 "icmp",
                 ovskey.ovs_key_icmp,
             ),
+            (
+                "OVS_KEY_ATTR_SCTP",
+                "sctp",
+                ovskey.ovs_key_sctp,
+            ),
             (
                 "OVS_KEY_ATTR_TCP_FLAGS",
                 "tcp_flags",

3/2 2026/07/07 11:32 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 3725
							output: 75
							thoughts: 305

Thoughts: 
**Analyzing a Selftest Patch**

Okay, so I'm looking at this patch that introduces a new test, `test_sctp_connect_v4`, within the Open vSwitch selftests. It's touching `tools/testing/selftests/net/openvswitch/openvswitch.sh` and `tools/testing/selftests/net/openvswitch/ovs-dpctl.py`, and it looks like it's adding `OVS_KEY_ATTR_SCTP` to the latter.

Now, the crucial point here is the scope of these changes. It's solely within the `tools/testing/selftests/` directory. No modifications to core kernel code, no changes to drivers, no impact on any architecture-specific code. It’s entirely self-contained within the testing framework.

I'm double-checking the diff to be absolutely certain... Yes, confirmed. Just the two selftest files.

Given this, I have to conclude that `WorthFuzzing=false`. The patch doesn't introduce any new functional kernel logic that would benefit from fuzzing. It's a test case, meant to verify existing functionality, not to expose new attack surfaces or vulnerabilities in the core kernel.

Therefore, the response I'll prepare will reflect this: the reasoning will clearly state that the patch's limited scope – only impacting the selftests – precludes the need for fuzzing. The `WorthFuzzing` flag will be set to `false`, the `FocusSymbols` array will remain empty, and `EnableConfigs` will also remain empty as there's no new kernel functionality being introduced.

4/2 2026/07/07 11:32 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test script and modifies a python script in the tools/testing/selftests/ directory. It does not modify any kernel source code, so there is no new kernel logic to fuzz.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test script and modifies a python script in the tools/testing/selftests/ directory. It does not modify any kernel source code, so there is no new kernel logic to fuzz.",
  "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)