AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/24 14:15 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test case to a selftest shell script (tools/testing/selftests/net/openvswitch/openvswitch.sh) and does not modify any functional kernel code.",
  "WorthFuzzing": false
}
1/1 2026/07/24 14:15 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit bc5ec329ffba2271216ddff1b12e4845dd1e790b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Fri Jul 24 14:15:25 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 853dbc1b00d7ab..176361f9e60fe8 100755\n--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh\n+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh\n@@ -34,6 +34,7 @@ tests=\"\n \taction_set\t\t\t\tset: SET action rewrites fields\n \ttrunc\t\t\t\t\ttrunc: output truncation\n \ticmpv6\t\t\t\t\ticmpv6: ICMPv6 echo type match\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@@ -611,6 +612,106 @@ test_icmpv6() {\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+\tmodprobe -q sctp 2\u003e/dev/null || return \"$ksft_skip\"\n+\tsocat -V 2\u003e\u00261 | grep -q SCTP || return \"$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+\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t    socat -u SCTP4-LISTEN:4443 STDOUT\n+\tlocal server_pid=\"$pid\"\n+\tovs_wait bash -c \\\n+\t    \"ip netns exec server ss -lnH sport = :4443 | grep -q .\" \\\n+\t    || return 1\n+\n+\tinfo \"verify SCTP association with port-keyed flows\"\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 \u003c/dev/null \\\n+\t    || return 1\n+\n+\tovs_del_flows \"$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 \"$server_pid\" 2\u003e/dev/null\n+\twait \"$server_pid\" 2\u003e/dev/null\n+\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t    socat -u SCTP4-LISTEN:4443 STDOUT\n+\tserver_pid=\"$pid\"\n+\tovs_wait bash -c \\\n+\t    \"ip netns exec server ss -lnH sport = :4443 | grep -q .\" \\\n+\t    || return 1\n+\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 \u003c/dev/null \\\n+\t    \u003e/dev/null 2\u003e\u00261 \\\n+\t    \u0026\u0026 { info \"connection should fail without flows\"\n+\t         return 1; }\n+\n+\tinfo \"reinstall flows and verify recovery\"\n+\tovs_add_flow \"$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+\twait \"$server_pid\" 2\u003e/dev/null\n+\tovs_netns_spawn_daemon \"$t\" \"server\" \\\n+\t    socat -u SCTP4-LISTEN:4443 STDOUT\n+\tovs_wait bash -c \\\n+\t    \"ip netns exec server ss -lnH sport = :4443 | grep -q .\" \\\n+\t    || return 1\n+\n+\tovs_sbx \"$t\" ip netns exec client \\\n+\t    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 \u003c/dev/null \\\n+\t    || return 1\n+\n+\treturn 0\n+}\n+\n # psample test\n # - use psample to observe packets\n test_psample() {\n"
}
2/1 2026/07/24 14:15 agent patch-evaluator
0m Model: 
best-expensive

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test case to a selftest shell script (tools/testing/selftests/net/openvswitch/openvswitch.sh) and does not modify any functional kernel code.",
  "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 bc5ec329ffba2271216ddff1b12e4845dd1e790b
Author: syz-cluster <triage@syzkaller.com>
Date:   Fri Jul 24 14:15:25 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 853dbc1b00d7ab..176361f9e60fe8 100755
--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh
+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh
@@ -34,6 +34,7 @@ tests="
 	action_set				set: SET action rewrites fields
 	trunc					trunc: output truncation
 	icmpv6					icmpv6: ICMPv6 echo type match
+	sctp_connect_v4				sctp: SCTP flow key matching
 	psample					psample: Sampling packets with psample"
 
 info() {
@@ -611,6 +612,106 @@ test_icmpv6() {
 	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"
+
+	modprobe -q sctp 2>/dev/null || return "$ksft_skip"
+	socat -V 2>&1 | grep -q SCTP || return "$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
+
+	ovs_netns_spawn_daemon "$t" "server" \
+	    socat -u SCTP4-LISTEN:4443 STDOUT
+	local server_pid="$pid"
+	ovs_wait bash -c \
+	    "ip netns exec server ss -lnH sport = :4443 | grep -q ." \
+	    || return 1
+
+	info "verify SCTP association with port-keyed flows"
+	ovs_sbx "$t" ip netns exec client \
+	    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 </dev/null \
+	    || return 1
+
+	ovs_del_flows "$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 "$server_pid" 2>/dev/null
+	wait "$server_pid" 2>/dev/null
+	ovs_netns_spawn_daemon "$t" "server" \
+	    socat -u SCTP4-LISTEN:4443 STDOUT
+	server_pid="$pid"
+	ovs_wait bash -c \
+	    "ip netns exec server ss -lnH sport = :4443 | grep -q ." \
+	    || return 1
+
+	ovs_sbx "$t" ip netns exec client \
+	    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 </dev/null \
+	    >/dev/null 2>&1 \
+	    && { info "connection should fail without flows"
+	         return 1; }
+
+	info "reinstall flows and verify recovery"
+	ovs_add_flow "$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
+	wait "$server_pid" 2>/dev/null
+	ovs_netns_spawn_daemon "$t" "server" \
+	    socat -u SCTP4-LISTEN:4443 STDOUT
+	ovs_wait bash -c \
+	    "ip netns exec server ss -lnH sport = :4443 | grep -q ." \
+	    || return 1
+
+	ovs_sbx "$t" ip netns exec client \
+	    socat -u STDIN SCTP4-CONNECT:172.31.110.20:4443 </dev/null \
+	    || return 1
+
+	return 0
+}
+
 # psample test
 # - use psample to observe packets
 test_psample() {

3/2 2026/07/24 14:15 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 3500
							output: 75
							thoughts: 201

Thoughts: 
**WorthFuzzing=false: A Quick Decision**

Okay, this one's straightforward. I've analyzed the patch and it's clear: we're looking at a new test case, specifically `test_sctp_connect_v4`, being added to `tools/testing/selftests/net/openvswitch/openvswitch.sh`. This is a *selftest script*. That's the key.

This change doesn't touch core kernel logic, nor does it involve any drivers or specific architectures. It's just a test within the `tools/testing/selftests/` directory. Therefore, it's not introducing any functional changes to the kernel that necessitate fuzzing. No need to go into any great detail.

Let me just quickly confirm by glancing at the diff itself. Ah, yep, exactly what I expected – just the addition to the shell script.

My conclusion is that this patch is *not* worth fuzzing. I'll confidently set the results accordingly, returning `WorthFuzzing=false`.

4/2 2026/07/24 14:15 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test case to a selftest shell script (tools/testing/selftests/net/openvswitch/openvswitch.sh) and does not modify any functional kernel code.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only adds a new test case to a selftest shell script (tools/testing/selftests/net/openvswitch/openvswitch.sh) and does not modify any functional kernel code.",
  "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)