AI Trajectory

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch only modifies userspace selftests in tools/testing/selftests/cgroup/ and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

null

{
  "PatchDiff": "commit 03c103e30d23084a3d358830000ed873ec246c04\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Aug 19 09:08:40 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c\nindex 88ca832d4fc13..64f4962a4659d 100644\n--- a/tools/testing/selftests/cgroup/test_core.c\n+++ b/tools/testing/selftests/cgroup/test_core.c\n@@ -927,7 +927,6 @@ int main(int argc, char *argv[])\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), \u0026nsdelegate)) {\n \t\tif (setup_named_v1_root(root, sizeof(root), CG_NAMED_NAME))\n \t\t\tksft_exit_skip(\"cgroup v2 isn't mounted and could not setup named v1 hierarchy\\n\");\n@@ -940,6 +939,7 @@ int main(int argc, char *argv[])\n \t\t\tksft_exit_skip(\"Failed to set memory controller\\n\");\n \n post_v2_setup:\n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_cpu.c b/tools/testing/selftests/cgroup/test_cpu.c\nindex 7a40d76b95487..8f96bfd19ab9f 100644\n--- a/tools/testing/selftests/cgroup/test_cpu.c\n+++ b/tools/testing/selftests/cgroup/test_cpu.c\n@@ -799,7 +799,6 @@ int main(int argc, char *argv[])\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -807,6 +806,7 @@ int main(int argc, char *argv[])\n \t\tif (cg_write(root, \"cgroup.subtree_control\", \"+cpu\"))\n \t\t\tksft_exit_skip(\"Failed to set cpu controller\\n\");\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_cpuset.c b/tools/testing/selftests/cgroup/test_cpuset.c\nindex c5cf8b56ceb8f..52ed8fba685ae 100644\n--- a/tools/testing/selftests/cgroup/test_cpuset.c\n+++ b/tools/testing/selftests/cgroup/test_cpuset.c\n@@ -250,7 +250,6 @@ int main(int argc, char *argv[])\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -258,6 +257,7 @@ int main(int argc, char *argv[])\n \t\tif (cg_write(root, \"cgroup.subtree_control\", \"+cpuset\"))\n \t\t\tksft_exit_skip(\"Failed to set cpuset controller\\n\");\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_freezer.c b/tools/testing/selftests/cgroup/test_freezer.c\nindex 0569e93fa6b00..f28bb02e9783b 100644\n--- a/tools/testing/selftests/cgroup/test_freezer.c\n+++ b/tools/testing/selftests/cgroup/test_freezer.c\n@@ -1491,9 +1491,9 @@ int main(int argc, char *argv[])\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_kill.c b/tools/testing/selftests/cgroup/test_kill.c\nindex f6cd23a8ecc71..99cafd9dc0136 100644\n--- a/tools/testing/selftests/cgroup/test_kill.c\n+++ b/tools/testing/selftests/cgroup/test_kill.c\n@@ -278,9 +278,9 @@ int main(int argc, char *argv[])\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/selftests/cgroup/test_kmem.c\nindex 1db0ba1226b9b..cb47561b4b443 100644\n--- a/tools/testing/selftests/cgroup/test_kmem.c\n+++ b/tools/testing/selftests/cgroup/test_kmem.c\n@@ -426,7 +426,6 @@ int main(int argc, char **argv)\n \tint i;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -441,6 +440,7 @@ int main(int argc, char **argv)\n \t\tif (cg_write(root, \"cgroup.subtree_control\", \"+memory\"))\n \t\t\tksft_exit_skip(\"Failed to set memory controller\\n\");\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c\nindex 0ebf796f3cffe..3a84d068fbf36 100644\n--- a/tools/testing/selftests/cgroup/test_memcontrol.c\n+++ b/tools/testing/selftests/cgroup/test_memcontrol.c\n@@ -1798,7 +1798,6 @@ int main(int argc, char **argv)\n \t\tpage_size = BUF_SIZE;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -1823,6 +1822,7 @@ int main(int argc, char **argv)\n \t\tksft_exit_skip(\"Failed to query cgroup mount option\\n\");\n \thas_localevents = proc_status;\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_pids.c b/tools/testing/selftests/cgroup/test_pids.c\nindex 9a387c815d2cd..710109b53dfe9 100644\n--- a/tools/testing/selftests/cgroup/test_pids.c\n+++ b/tools/testing/selftests/cgroup/test_pids.c\n@@ -148,7 +148,6 @@ int main(int argc, char **argv)\n \tchar root[PATH_MAX];\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -163,6 +162,7 @@ int main(int argc, char **argv)\n \t\tif (cg_write(root, \"cgroup.subtree_control\", \"+pids\"))\n \t\t\tksft_exit_skip(\"Failed to set pids controller\\n\");\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (int i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\ndiff --git a/tools/testing/selftests/cgroup/test_zswap.c b/tools/testing/selftests/cgroup/test_zswap.c\nindex 49b36ee791606..6e7b89315bbf3 100644\n--- a/tools/testing/selftests/cgroup/test_zswap.c\n+++ b/tools/testing/selftests/cgroup/test_zswap.c\n@@ -810,7 +810,6 @@ int main(int argc, char **argv)\n \t\tpage_size = BUF_SIZE;\n \n \tksft_print_header();\n-\tksft_set_plan(ARRAY_SIZE(tests));\n \tif (cg_find_unified_root(root, sizeof(root), NULL))\n \t\tksft_exit_skip(\"cgroup v2 isn't mounted\\n\");\n \n@@ -827,6 +826,7 @@ int main(int argc, char **argv)\n \t\tif (cg_write(root, \"cgroup.subtree_control\", \"+memory\"))\n \t\t\tksft_exit_skip(\"Failed to set memory controller\\n\");\n \n+\tksft_set_plan(ARRAY_SIZE(tests));\n \tfor (i = 0; i \u003c ARRAY_SIZE(tests); i++) {\n \t\tswitch (tests[i].fn(root)) {\n \t\tcase KSFT_PASS:\n"
}

best-expensive

null

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies userspace selftests in tools/testing/selftests/cgroup/ and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

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).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

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.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
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.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. 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.

For your convenience, here is the diff of the changes:
commit 03c103e30d23084a3d358830000ed873ec246c04
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Aug 19 09:08:40 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/cgroup/test_core.c b/tools/testing/selftests/cgroup/test_core.c
index 88ca832d4fc13..64f4962a4659d 100644
--- a/tools/testing/selftests/cgroup/test_core.c
+++ b/tools/testing/selftests/cgroup/test_core.c
@@ -927,7 +927,6 @@ int main(int argc, char *argv[])
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), &nsdelegate)) {
 		if (setup_named_v1_root(root, sizeof(root), CG_NAMED_NAME))
 			ksft_exit_skip("cgroup v2 isn't mounted and could not setup named v1 hierarchy\n");
@@ -940,6 +939,7 @@ int main(int argc, char *argv[])
 			ksft_exit_skip("Failed to set memory controller\n");
 
 post_v2_setup:
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_cpu.c b/tools/testing/selftests/cgroup/test_cpu.c
index 7a40d76b95487..8f96bfd19ab9f 100644
--- a/tools/testing/selftests/cgroup/test_cpu.c
+++ b/tools/testing/selftests/cgroup/test_cpu.c
@@ -799,7 +799,6 @@ int main(int argc, char *argv[])
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -807,6 +806,7 @@ int main(int argc, char *argv[])
 		if (cg_write(root, "cgroup.subtree_control", "+cpu"))
 			ksft_exit_skip("Failed to set cpu controller\n");
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_cpuset.c b/tools/testing/selftests/cgroup/test_cpuset.c
index c5cf8b56ceb8f..52ed8fba685ae 100644
--- a/tools/testing/selftests/cgroup/test_cpuset.c
+++ b/tools/testing/selftests/cgroup/test_cpuset.c
@@ -250,7 +250,6 @@ int main(int argc, char *argv[])
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -258,6 +257,7 @@ int main(int argc, char *argv[])
 		if (cg_write(root, "cgroup.subtree_control", "+cpuset"))
 			ksft_exit_skip("Failed to set cpuset controller\n");
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_freezer.c b/tools/testing/selftests/cgroup/test_freezer.c
index 0569e93fa6b00..f28bb02e9783b 100644
--- a/tools/testing/selftests/cgroup/test_freezer.c
+++ b/tools/testing/selftests/cgroup/test_freezer.c
@@ -1491,9 +1491,9 @@ int main(int argc, char *argv[])
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_kill.c b/tools/testing/selftests/cgroup/test_kill.c
index f6cd23a8ecc71..99cafd9dc0136 100644
--- a/tools/testing/selftests/cgroup/test_kill.c
+++ b/tools/testing/selftests/cgroup/test_kill.c
@@ -278,9 +278,9 @@ int main(int argc, char *argv[])
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/selftests/cgroup/test_kmem.c
index 1db0ba1226b9b..cb47561b4b443 100644
--- a/tools/testing/selftests/cgroup/test_kmem.c
+++ b/tools/testing/selftests/cgroup/test_kmem.c
@@ -426,7 +426,6 @@ int main(int argc, char **argv)
 	int i;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -441,6 +440,7 @@ int main(int argc, char **argv)
 		if (cg_write(root, "cgroup.subtree_control", "+memory"))
 			ksft_exit_skip("Failed to set memory controller\n");
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c
index 0ebf796f3cffe..3a84d068fbf36 100644
--- a/tools/testing/selftests/cgroup/test_memcontrol.c
+++ b/tools/testing/selftests/cgroup/test_memcontrol.c
@@ -1798,7 +1798,6 @@ int main(int argc, char **argv)
 		page_size = BUF_SIZE;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -1823,6 +1822,7 @@ int main(int argc, char **argv)
 		ksft_exit_skip("Failed to query cgroup mount option\n");
 	has_localevents = proc_status;
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_pids.c b/tools/testing/selftests/cgroup/test_pids.c
index 9a387c815d2cd..710109b53dfe9 100644
--- a/tools/testing/selftests/cgroup/test_pids.c
+++ b/tools/testing/selftests/cgroup/test_pids.c
@@ -148,7 +148,6 @@ int main(int argc, char **argv)
 	char root[PATH_MAX];
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -163,6 +162,7 @@ int main(int argc, char **argv)
 		if (cg_write(root, "cgroup.subtree_control", "+pids"))
 			ksft_exit_skip("Failed to set pids controller\n");
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (int i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:
diff --git a/tools/testing/selftests/cgroup/test_zswap.c b/tools/testing/selftests/cgroup/test_zswap.c
index 49b36ee791606..6e7b89315bbf3 100644
--- a/tools/testing/selftests/cgroup/test_zswap.c
+++ b/tools/testing/selftests/cgroup/test_zswap.c
@@ -810,7 +810,6 @@ int main(int argc, char **argv)
 		page_size = BUF_SIZE;
 
 	ksft_print_header();
-	ksft_set_plan(ARRAY_SIZE(tests));
 	if (cg_find_unified_root(root, sizeof(root), NULL))
 		ksft_exit_skip("cgroup v2 isn't mounted\n");
 
@@ -827,6 +826,7 @@ int main(int argc, char **argv)
 		if (cg_write(root, "cgroup.subtree_control", "+memory"))
 			ksft_exit_skip("Failed to set memory controller\n");
 
+	ksft_set_plan(ARRAY_SIZE(tests));
 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
 		switch (tests[i].fn(root)) {
 		case KSFT_PASS:

gemini-3.1-pro-preview

null

null

							input: 4801
							output: 64
							thoughts: 322
						

**Analyzing a cgroup selftest patch**

Okay, so this patch is touching a few files within `tools/testing/selftests/cgroup/`. From a quick glance, it looks like it's just moving the `ksft_set_plan()` call around after the `ksft_exit_skip()` calls within the `main()` function of each of these cgroup selftests. No real code changes, only where the setup function is called.

The key thing is, this is all contained within the selftests framework itself. This means it's solely related to test infrastructure and doesn't modify any core kernel logic, drivers, or even architecture-specific code. This type of change is pretty low-impact, really.

Let's double-check those file locations just to be certain. Yep, it's all contained in `tools/testing/selftests/cgroup/`, as expected:

- `test_core.c`
- `test_cpu.c`
- `test_cpuset.c`
- `test_freezer.c`
- `test_kill.c`
- `test_kmem.c`
- `test_memcontrol.c`
- `test_pids.c`
- `test_zswap.c`

Right, confirmed. No kernel code is being touched here. Given this, fuzzing would be completely pointless. This change can't introduce any functional regressions.

Therefore, WorthFuzzing=false. I'm going to log that and move on.

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies userspace selftests in tools/testing/selftests/cgroup/ and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies userspace selftests in tools/testing/selftests/cgroup/ and does not make any functional changes to the kernel itself.",
  "WorthFuzzing": false
}

{
  "WorthFuzzing": false
}

null