| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/09/08 19:08 | flow | patch-triage |
0mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies only user-space tools and documentation under tools/ (bpftool and perf prog profiler skeletons). No kernel source files or kernel modules affecting vmlinux are modified.",
"WorthFuzzing": false
} |
| 1/1 | 2026/09/08 19:08 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 4acce18ccb2eef1a3487f998916ada911c61b89f\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Sep 8 19:08:02 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst\nindex 90fa2a48cc26a..0108a1c8be4db 100644\n--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst\n+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst\n@@ -217,7 +217,16 @@ bpftool prog run *PROG* data_in *FILE* [data_out *FILE* [data_size_out *L*]] [ct\n bpftool prog profile *PROG* [duration *DURATION*] *METRICs*\n Profile *METRICs* for bpf program *PROG* for *DURATION* seconds or until\n user hits \u003cCtrl+C\u003e. *DURATION* is optional. If *DURATION* is not specified,\n- the profiling will run up to **UINT_MAX** seconds.\n+ the profiling will run up to **UINT_MAX** seconds. Plain output scales each\n+ per-CPU metric value to correct for perf event multiplexing. When\n+ **cycles** is selected, it also reports cycles per included program run. If\n+ a selected metric was not scheduled on a CPU, all metric values exclude\n+ that CPU so that ratios use a consistent CPU set. The **run_cnt** value\n+ still includes all recorded runs.\n+\n+ In JSON output, **value** is raw, **value_scaled** is scaled, **run_cnt**\n+ includes all runs, and **run_cnt_valid** includes only runs used for metric\n+ values.\n \n bpftool prog help\n Print short help message.\n@@ -360,7 +369,7 @@ EXAMPLES\n ::\n \n 51397 run_cnt\n- 40176203 cycles (83.05%)\n+ 40176203 cycles # 781.68 cycles per run (83.05%)\n 42518139 instructions # 1.06 insns per cycle (83.39%)\n 123 llc_misses # 2.89 LLC misses per million insns (83.15%)\n \ndiff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c\nindex 8c2f9255b36d7..9e126f3823ad3 100644\n--- a/tools/bpf/bpftool/prog.c\n+++ b/tools/bpf/bpftool/prog.c\n@@ -2062,37 +2062,52 @@ static int do_profile(int argc, char **argv)\n \n #include \"profiler.skel.h\"\n \n+enum ratio_metric {\n+\tMETRIC_NONE = -2,\n+\tMETRIC_RUN_CNT = -1,\n+\tMETRIC_CYCLES = 0,\n+\tMETRIC_INSTRUCTIONS = 1,\n+\tMETRIC_L1D_LOADS = 2,\n+\tMETRIC_LLC_MISSES = 3,\n+\tMETRIC_ITLB_MISSES = 4,\n+\tMETRIC_DTLB_MISSES = 5,\n+};\n+\n struct profile_metric {\n \tconst char *name;\n \tstruct bpf_perf_event_value val;\n+\t__u64 scaled_val;\n \tstruct perf_event_attr attr;\n \tbool selected;\n \n \t/* calculate ratios like instructions per cycle */\n-\tconst int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */\n+\tconst enum ratio_metric ratio_metric;\n \tconst char *ratio_desc;\n \tconst float ratio_mul;\n } metrics[] = {\n-\t{\n+\t[METRIC_CYCLES] = {\n \t\t.name = \"cycles\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HARDWARE,\n \t\t\t.config = PERF_COUNT_HW_CPU_CYCLES,\n \t\t\t.exclude_user = 1,\n \t\t},\n+\t\t.ratio_metric = METRIC_RUN_CNT,\n+\t\t.ratio_desc = \"cycles per run\",\n+\t\t.ratio_mul = 1.0,\n \t},\n-\t{\n+\t[METRIC_INSTRUCTIONS] = {\n \t\t.name = \"instructions\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HARDWARE,\n \t\t\t.config = PERF_COUNT_HW_INSTRUCTIONS,\n \t\t\t.exclude_user = 1,\n \t\t},\n-\t\t.ratio_metric = 1,\n+\t\t.ratio_metric = METRIC_CYCLES,\n \t\t.ratio_desc = \"insns per cycle\",\n \t\t.ratio_mul = 1.0,\n \t},\n-\t{\n+\t[METRIC_L1D_LOADS] = {\n \t\t.name = \"l1d_loads\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HW_CACHE,\n@@ -2102,8 +2117,9 @@ struct profile_metric {\n \t\t\t\t(PERF_COUNT_HW_CACHE_RESULT_ACCESS \u003c\u003c 16),\n \t\t\t.exclude_user = 1,\n \t\t},\n+\t\t.ratio_metric = METRIC_NONE,\n \t},\n-\t{\n+\t[METRIC_LLC_MISSES] = {\n \t\t.name = \"llc_misses\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HW_CACHE,\n@@ -2113,11 +2129,11 @@ struct profile_metric {\n \t\t\t\t(PERF_COUNT_HW_CACHE_RESULT_MISS \u003c\u003c 16),\n \t\t\t.exclude_user = 1\n \t\t},\n-\t\t.ratio_metric = 2,\n+\t\t.ratio_metric = METRIC_INSTRUCTIONS,\n \t\t.ratio_desc = \"LLC misses per million insns\",\n \t\t.ratio_mul = 1e6,\n \t},\n-\t{\n+\t[METRIC_ITLB_MISSES] = {\n \t\t.name = \"itlb_misses\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HW_CACHE,\n@@ -2127,11 +2143,11 @@ struct profile_metric {\n \t\t\t\t(PERF_COUNT_HW_CACHE_RESULT_MISS \u003c\u003c 16),\n \t\t\t.exclude_user = 1\n \t\t},\n-\t\t.ratio_metric = 2,\n+\t\t.ratio_metric = METRIC_INSTRUCTIONS,\n \t\t.ratio_desc = \"itlb misses per million insns\",\n \t\t.ratio_mul = 1e6,\n \t},\n-\t{\n+\t[METRIC_DTLB_MISSES] = {\n \t\t.name = \"dtlb_misses\",\n \t\t.attr = {\n \t\t\t.type = PERF_TYPE_HW_CACHE,\n@@ -2141,13 +2157,14 @@ struct profile_metric {\n \t\t\t\t(PERF_COUNT_HW_CACHE_RESULT_MISS \u003c\u003c 16),\n \t\t\t.exclude_user = 1\n \t\t},\n-\t\t.ratio_metric = 2,\n+\t\t.ratio_metric = METRIC_INSTRUCTIONS,\n \t\t.ratio_desc = \"dtlb misses per million insns\",\n \t\t.ratio_mul = 1e6,\n \t},\n };\n \n static __u64 profile_total_count;\n+static __u64 profile_valid_count;\n \n #define MAX_NUM_PROFILE_METRICS 4\n \n@@ -2182,9 +2199,39 @@ static int profile_parse_metrics(int argc, char **argv)\n \treturn selected_cnt;\n }\n \n-static void profile_read_values(struct profiler_bpf *obj)\n+/*\n+ * Filter out CPUs that have any selected metric not scheduled for them. This makes sure all\n+ * metrics are using the same CPU set, as a result ratio metrics are consistent.\n+ */\n+static void profile_filter_cpus(__u32 num_cpu,\n+\t\t\t\tstruct bpf_perf_event_value vals[MAX_NUM_PROFILE_METRICS][num_cpu],\n+\t\t\t\t__u64 *counts)\n+{\n+\t__u32 m, cpu, key = 0;\n+\n+\tfor (m = 0; m \u003c ARRAY_SIZE(metrics); m++) {\n+\t\tif (!metrics[m].selected)\n+\t\t\tcontinue;\n+\n+\t\tfor (cpu = 0; cpu \u003c num_cpu; cpu++) {\n+\t\t\t/*\n+\t\t\t * CPU has hits, but this metric never scheduled, set counts[cpu] to 0\n+\t\t\t * so other metrics ignore this CPU too\n+\t\t\t */\n+\t\t\tif (counts[cpu] \u0026\u0026 !vals[key][cpu].running) {\n+\t\t\t\tp_info(\"%s not scheduled on CPU %u; excluding %llu runs from all metrics\",\n+\t\t\t\t metrics[m].name, cpu, counts[cpu]);\n+\t\t\t\tcounts[cpu] = 0;\n+\t\t\t}\n+\t\t}\n+\t\tkey++;\n+\t}\n+}\n+\n+static int profile_read_values(struct profiler_bpf *obj)\n {\n \t__u32 m, cpu, num_cpu = obj-\u003erodata-\u003enum_cpu;\n+\tstruct bpf_perf_event_value values[MAX_NUM_PROFILE_METRICS][num_cpu], *val;\n \tint reading_map_fd, count_map_fd;\n \t__u64 counts[num_cpu];\n \t__u32 key = 0;\n@@ -2194,38 +2241,61 @@ static void profile_read_values(struct profiler_bpf *obj)\n \tcount_map_fd = bpf_map__fd(obj-\u003emaps.counts);\n \tif (reading_map_fd \u003c 0 || count_map_fd \u003c 0) {\n \t\tp_err(\"failed to get fd for map\");\n-\t\treturn;\n+\t\treturn min(reading_map_fd, count_map_fd);\n \t}\n \n \terr = bpf_map_lookup_elem(count_map_fd, \u0026key, counts);\n \tif (err) {\n \t\tp_err(\"failed to read count_map: %s\", strerror(errno));\n-\t\treturn;\n+\t\treturn err;\n+\t}\n+\n+\tfor (m = 0; m \u003c ARRAY_SIZE(metrics); m++) {\n+\t\tif (!metrics[m].selected)\n+\t\t\tcontinue;\n+\n+\t\terr = bpf_map_lookup_elem(reading_map_fd, \u0026key, values[key]);\n+\t\tif (err) {\n+\t\t\tp_err(\"failed to read reading_map: %s\", strerror(errno));\n+\t\t\treturn err;\n+\t\t}\n+\t\tkey++;\n \t}\n \n \tprofile_total_count = 0;\n \tfor (cpu = 0; cpu \u003c num_cpu; cpu++)\n \t\tprofile_total_count += counts[cpu];\n \n+\tprofile_filter_cpus(num_cpu, values, counts);\n+\n+\tprofile_valid_count = 0;\n+\tfor (cpu = 0; cpu \u003c num_cpu; cpu++)\n+\t\tprofile_valid_count += counts[cpu];\n+\n+\tkey = 0;\n \tfor (m = 0; m \u003c ARRAY_SIZE(metrics); m++) {\n-\t\tstruct bpf_perf_event_value values[num_cpu];\n+\t\tdouble scale;\n \n \t\tif (!metrics[m].selected)\n \t\t\tcontinue;\n \n-\t\terr = bpf_map_lookup_elem(reading_map_fd, \u0026key, values);\n-\t\tif (err) {\n-\t\t\tp_err(\"failed to read reading_map: %s\",\n-\t\t\t strerror(errno));\n-\t\t\treturn;\n-\t\t}\n \t\tfor (cpu = 0; cpu \u003c num_cpu; cpu++) {\n-\t\t\tmetrics[m].val.counter += values[cpu].counter;\n-\t\t\tmetrics[m].val.enabled += values[cpu].enabled;\n-\t\t\tmetrics[m].val.running += values[cpu].running;\n+\t\t\t/* Skip CPUs with no runs or with an unscheduled metric. */\n+\t\t\tif (!counts[cpu])\n+\t\t\t\tcontinue;\n+\n+\t\t\tval = \u0026values[key][cpu];\n+\n+\t\t\tmetrics[m].val.enabled += val-\u003eenabled;\n+\t\t\tmetrics[m].val.running += val-\u003erunning;\n+\t\t\tmetrics[m].val.counter += val-\u003ecounter;\n+\t\t\t/* Scale counter values to account for perf event multiplexing. */\n+\t\t\tscale = (double)val-\u003eenabled / val-\u003erunning;\n+\t\t\tmetrics[m].scaled_val += val-\u003ecounter * scale;\n \t\t}\n \t\tkey++;\n \t}\n+\treturn 0;\n }\n \n static void profile_print_readings_json(void)\n@@ -2239,9 +2309,11 @@ static void profile_print_readings_json(void)\n \t\tjsonw_start_object(json_wtr);\n \t\tjsonw_string_field(json_wtr, \"metric\", metrics[m].name);\n \t\tjsonw_lluint_field(json_wtr, \"run_cnt\", profile_total_count);\n+\t\tjsonw_lluint_field(json_wtr, \"run_cnt_valid\", profile_valid_count);\n \t\tjsonw_lluint_field(json_wtr, \"value\", metrics[m].val.counter);\n \t\tjsonw_lluint_field(json_wtr, \"enabled\", metrics[m].val.enabled);\n \t\tjsonw_lluint_field(json_wtr, \"running\", metrics[m].val.running);\n+\t\tjsonw_lluint_field(json_wtr, \"value_scaled\", metrics[m].scaled_val);\n \n \t\tjsonw_end_object(json_wtr);\n \t}\n@@ -2250,24 +2322,34 @@ static void profile_print_readings_json(void)\n \n static void profile_print_readings_plain(void)\n {\n-\t__u32 m;\n+\t__u32 i;\n \n \tprintf(\"\\n%18llu %-20s\\n\", profile_total_count, \"run_cnt\");\n-\tfor (m = 0; m \u003c ARRAY_SIZE(metrics); m++) {\n-\t\tstruct bpf_perf_event_value *val = \u0026metrics[m].val;\n+\tfor (i = 0; i \u003c ARRAY_SIZE(metrics); i++) {\n+\t\tstruct profile_metric *m = \u0026metrics[i];\n+\t\tstruct bpf_perf_event_value *val = \u0026m-\u003eval;\n \t\tint r;\n+\t\t__u64 ratio;\n \n-\t\tif (!metrics[m].selected)\n+\t\tif (!m-\u003eselected)\n \t\t\tcontinue;\n-\t\tprintf(\"%18llu %-20s\", val-\u003ecounter, metrics[m].name);\n+\t\tprintf(\"%18llu %-20s\", m-\u003escaled_val, m-\u003ename);\n \n-\t\tr = metrics[m].ratio_metric - 1;\n-\t\tif (r \u003e= 0 \u0026\u0026 metrics[r].selected \u0026\u0026\n-\t\t metrics[r].val.counter \u003e 0) {\n+\t\tr = m-\u003eratio_metric;\n+\t\tswitch (r) {\n+\t\tcase METRIC_RUN_CNT:\n+\t\t\tratio = profile_valid_count;\n+\t\t\tbreak;\n+\t\tcase METRIC_NONE:\n+\t\t\tratio = 0;\n+\t\t\tbreak;\n+\t\tdefault:\n+\t\t\tratio = metrics[r].scaled_val;\n+\t\t}\n+\t\tif (ratio) {\n \t\t\tprintf(\"# %8.2f %-30s\",\n-\t\t\t val-\u003ecounter * metrics[m].ratio_mul /\n-\t\t\t metrics[r].val.counter,\n-\t\t\t metrics[m].ratio_desc);\n+\t\t\t m-\u003escaled_val * m-\u003eratio_mul / ratio,\n+\t\t\t m-\u003eratio_desc);\n \t\t} else {\n \t\t\tprintf(\"%-41s\", \"\");\n \t\t}\n@@ -2423,9 +2505,12 @@ static int profile_open_perf_events(struct profiler_bpf *obj)\n \n static void profile_print_and_cleanup(void)\n {\n+\tint err;\n+\n \tprofile_close_perf_events(profile_obj);\n-\tprofile_read_values(profile_obj);\n-\tprofile_print_readings();\n+\terr = profile_read_values(profile_obj);\n+\tif (!err)\n+\t\tprofile_print_readings();\n \tprofiler_bpf__destroy(profile_obj);\n \n \tclose(profile_tgt_fd);\ndiff --git a/tools/bpf/bpftool/skeleton/profiler.bpf.c b/tools/bpf/bpftool/skeleton/profiler.bpf.c\nindex f48c783cb9f7f..6c654bd9b346f 100644\n--- a/tools/bpf/bpftool/skeleton/profiler.bpf.c\n+++ b/tools/bpf/bpftool/skeleton/profiler.bpf.c\n@@ -10,6 +10,11 @@ struct bpf_perf_event_value___local {\n \t__u64 running;\n } __attribute__((preserve_access_index));\n \n+struct profile_reading {\n+\tstruct bpf_perf_event_value___local value;\n+\tbool armed;\n+};\n+\n /* map of perf event fds, num_cpu * num_metric entries */\n struct {\n \t__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);\n@@ -21,7 +26,7 @@ struct {\n struct {\n \t__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);\n \t__uint(key_size, sizeof(u32));\n-\t__uint(value_size, sizeof(struct bpf_perf_event_value___local));\n+\t__uint(value_size, sizeof(struct profile_reading));\n } fentry_readings SEC(\".maps\");\n \n /* accumulated readings */\n@@ -45,7 +50,7 @@ const volatile __u32 num_metric = 1;\n SEC(\"fentry/XXX\")\n int BPF_PROG(fentry_XXX)\n {\n-\tstruct bpf_perf_event_value___local *ptrs[MAX_NUM_METRICS];\n+\tstruct profile_reading *ptrs[MAX_NUM_METRICS];\n \tu32 key = bpf_get_smp_processor_id();\n \tu32 i;\n \n@@ -56,6 +61,7 @@ int BPF_PROG(fentry_XXX)\n \t\tptrs[i] = bpf_map_lookup_elem(\u0026fentry_readings, \u0026flag);\n \t\tif (!ptrs[i])\n \t\t\treturn 0;\n+\t\tptrs[i]-\u003earmed = false;\n \t}\n \n \tfor (i = 0; i \u003c num_metric \u0026\u0026 i \u003c MAX_NUM_METRICS; i++) {\n@@ -66,7 +72,8 @@ int BPF_PROG(fentry_XXX)\n \t\t\t\t\t\tsizeof(reading));\n \t\tif (err)\n \t\t\treturn 0;\n-\t\t*(ptrs[i]) = reading;\n+\t\tptrs[i]-\u003evalue = reading;\n+\t\tptrs[i]-\u003earmed = true;\n \t\tkey += num_cpu;\n \t}\n \n@@ -76,16 +83,18 @@ int BPF_PROG(fentry_XXX)\n static inline void\n fexit_update_maps(u32 id, struct bpf_perf_event_value___local *after)\n {\n-\tstruct bpf_perf_event_value___local *before, diff;\n+\tstruct profile_reading *before;\n+\tstruct bpf_perf_event_value___local diff;\n \n \tbefore = bpf_map_lookup_elem(\u0026fentry_readings, \u0026id);\n \t/* only account samples with a valid fentry_reading */\n-\tif (before \u0026\u0026 before-\u003ecounter) {\n+\tif (before \u0026\u0026 before-\u003earmed) {\n \t\tstruct bpf_perf_event_value___local *accum;\n \n-\t\tdiff.counter = after-\u003ecounter - before-\u003ecounter;\n-\t\tdiff.enabled = after-\u003eenabled - before-\u003eenabled;\n-\t\tdiff.running = after-\u003erunning - before-\u003erunning;\n+\t\tbefore-\u003earmed = false;\n+\t\tdiff.counter = after-\u003ecounter - before-\u003evalue.counter;\n+\t\tdiff.enabled = after-\u003eenabled - before-\u003evalue.enabled;\n+\t\tdiff.running = after-\u003erunning - before-\u003evalue.running;\n \n \t\taccum = bpf_map_lookup_elem(\u0026accum_readings, \u0026id);\n \t\tif (accum) {\ndiff --git a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c\nindex 97037d3b3d9fa..7bc0db26e0050 100644\n--- a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c\n+++ b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c\n@@ -4,6 +4,11 @@\n #include \u003cbpf/bpf_helpers.h\u003e\n #include \u003cbpf/bpf_tracing.h\u003e\n \n+struct profile_reading {\n+\tstruct bpf_perf_event_value value;\n+\tbool armed;\n+};\n+\n /* map of perf event fds, num_cpu * num_metric entries */\n struct {\n \t__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);\n@@ -15,7 +20,7 @@ struct {\n struct {\n \t__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);\n \t__uint(key_size, sizeof(__u32));\n-\t__uint(value_size, sizeof(struct bpf_perf_event_value));\n+\t__uint(value_size, sizeof(struct profile_reading));\n \t__uint(max_entries, 1);\n } fentry_readings SEC(\".maps\");\n \n@@ -33,7 +38,7 @@ SEC(\"fentry/XXX\")\n int BPF_PROG(fentry_XXX)\n {\n \t__u32 key = bpf_get_smp_processor_id();\n-\tstruct bpf_perf_event_value *ptr;\n+\tstruct profile_reading *ptr;\n \t__u32 zero = 0;\n \tlong err;\n \n@@ -42,9 +47,12 @@ int BPF_PROG(fentry_XXX)\n \tif (!ptr)\n \t\treturn 0;\n \n-\terr = bpf_perf_event_read_value(\u0026events, key, ptr, sizeof(*ptr));\n+\tptr-\u003earmed = false;\n+\terr = bpf_perf_event_read_value(\u0026events, key, \u0026ptr-\u003evalue,\n+\t\t\t\t\tsizeof(ptr-\u003evalue));\n \tif (err)\n \t\treturn 0;\n+\tptr-\u003earmed = true;\n \n \treturn 0;\n }\n@@ -52,17 +60,19 @@ int BPF_PROG(fentry_XXX)\n static inline void\n fexit_update_maps(struct bpf_perf_event_value *after)\n {\n-\tstruct bpf_perf_event_value *before, diff;\n+\tstruct profile_reading *before;\n+\tstruct bpf_perf_event_value diff;\n \t__u32 zero = 0;\n \n \tbefore = bpf_map_lookup_elem(\u0026fentry_readings, \u0026zero);\n \t/* only account samples with a valid fentry_reading */\n-\tif (before \u0026\u0026 before-\u003ecounter) {\n+\tif (before \u0026\u0026 before-\u003earmed) {\n \t\tstruct bpf_perf_event_value *accum;\n \n-\t\tdiff.counter = after-\u003ecounter - before-\u003ecounter;\n-\t\tdiff.enabled = after-\u003eenabled - before-\u003eenabled;\n-\t\tdiff.running = after-\u003erunning - before-\u003erunning;\n+\t\tbefore-\u003earmed = false;\n+\t\tdiff.counter = after-\u003ecounter - before-\u003evalue.counter;\n+\t\tdiff.enabled = after-\u003eenabled - before-\u003evalue.enabled;\n+\t\tdiff.running = after-\u003erunning - before-\u003evalue.running;\n \n \t\taccum = bpf_map_lookup_elem(\u0026accum_readings, \u0026zero);\n \t\tif (accum) {\n"
} |
| 2/1 | 2026/09/08 19:08 | agent | patch-evaluator |
0mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies only user-space tools and documentation under tools/ (bpftool and perf prog profiler skeletons). No kernel source files or kernel modules affecting vmlinux are modified.",
"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 4acce18ccb2eef1a3487f998916ada911c61b89f
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Sep 8 19:08:02 2026 +0000
syz-cluster: applied patch under review
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index 90fa2a48cc26a..0108a1c8be4db 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -217,7 +217,16 @@ bpftool prog run *PROG* data_in *FILE* [data_out *FILE* [data_size_out *L*]] [ct
bpftool prog profile *PROG* [duration *DURATION*] *METRICs*
Profile *METRICs* for bpf program *PROG* for *DURATION* seconds or until
user hits <Ctrl+C>. *DURATION* is optional. If *DURATION* is not specified,
- the profiling will run up to **UINT_MAX** seconds.
+ the profiling will run up to **UINT_MAX** seconds. Plain output scales each
+ per-CPU metric value to correct for perf event multiplexing. When
+ **cycles** is selected, it also reports cycles per included program run. If
+ a selected metric was not scheduled on a CPU, all metric values exclude
+ that CPU so that ratios use a consistent CPU set. The **run_cnt** value
+ still includes all recorded runs.
+
+ In JSON output, **value** is raw, **value_scaled** is scaled, **run_cnt**
+ includes all runs, and **run_cnt_valid** includes only runs used for metric
+ values.
bpftool prog help
Print short help message.
@@ -360,7 +369,7 @@ EXAMPLES
::
51397 run_cnt
- 40176203 cycles (83.05%)
+ 40176203 cycles # 781.68 cycles per run (83.05%)
42518139 instructions # 1.06 insns per cycle (83.39%)
123 llc_misses # 2.89 LLC misses per million insns (83.15%)
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 8c2f9255b36d7..9e126f3823ad3 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -2062,37 +2062,52 @@ static int do_profile(int argc, char **argv)
#include "profiler.skel.h"
+enum ratio_metric {
+ METRIC_NONE = -2,
+ METRIC_RUN_CNT = -1,
+ METRIC_CYCLES = 0,
+ METRIC_INSTRUCTIONS = 1,
+ METRIC_L1D_LOADS = 2,
+ METRIC_LLC_MISSES = 3,
+ METRIC_ITLB_MISSES = 4,
+ METRIC_DTLB_MISSES = 5,
+};
+
struct profile_metric {
const char *name;
struct bpf_perf_event_value val;
+ __u64 scaled_val;
struct perf_event_attr attr;
bool selected;
/* calculate ratios like instructions per cycle */
- const int ratio_metric; /* 0 for N/A, 1 for index 0 (cycles) */
+ const enum ratio_metric ratio_metric;
const char *ratio_desc;
const float ratio_mul;
} metrics[] = {
- {
+ [METRIC_CYCLES] = {
.name = "cycles",
.attr = {
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_CPU_CYCLES,
.exclude_user = 1,
},
+ .ratio_metric = METRIC_RUN_CNT,
+ .ratio_desc = "cycles per run",
+ .ratio_mul = 1.0,
},
- {
+ [METRIC_INSTRUCTIONS] = {
.name = "instructions",
.attr = {
.type = PERF_TYPE_HARDWARE,
.config = PERF_COUNT_HW_INSTRUCTIONS,
.exclude_user = 1,
},
- .ratio_metric = 1,
+ .ratio_metric = METRIC_CYCLES,
.ratio_desc = "insns per cycle",
.ratio_mul = 1.0,
},
- {
+ [METRIC_L1D_LOADS] = {
.name = "l1d_loads",
.attr = {
.type = PERF_TYPE_HW_CACHE,
@@ -2102,8 +2117,9 @@ struct profile_metric {
(PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16),
.exclude_user = 1,
},
+ .ratio_metric = METRIC_NONE,
},
- {
+ [METRIC_LLC_MISSES] = {
.name = "llc_misses",
.attr = {
.type = PERF_TYPE_HW_CACHE,
@@ -2113,11 +2129,11 @@ struct profile_metric {
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
.exclude_user = 1
},
- .ratio_metric = 2,
+ .ratio_metric = METRIC_INSTRUCTIONS,
.ratio_desc = "LLC misses per million insns",
.ratio_mul = 1e6,
},
- {
+ [METRIC_ITLB_MISSES] = {
.name = "itlb_misses",
.attr = {
.type = PERF_TYPE_HW_CACHE,
@@ -2127,11 +2143,11 @@ struct profile_metric {
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
.exclude_user = 1
},
- .ratio_metric = 2,
+ .ratio_metric = METRIC_INSTRUCTIONS,
.ratio_desc = "itlb misses per million insns",
.ratio_mul = 1e6,
},
- {
+ [METRIC_DTLB_MISSES] = {
.name = "dtlb_misses",
.attr = {
.type = PERF_TYPE_HW_CACHE,
@@ -2141,13 +2157,14 @@ struct profile_metric {
(PERF_COUNT_HW_CACHE_RESULT_MISS << 16),
.exclude_user = 1
},
- .ratio_metric = 2,
+ .ratio_metric = METRIC_INSTRUCTIONS,
.ratio_desc = "dtlb misses per million insns",
.ratio_mul = 1e6,
},
};
static __u64 profile_total_count;
+static __u64 profile_valid_count;
#define MAX_NUM_PROFILE_METRICS 4
@@ -2182,9 +2199,39 @@ static int profile_parse_metrics(int argc, char **argv)
return selected_cnt;
}
-static void profile_read_values(struct profiler_bpf *obj)
+/*
+ * Filter out CPUs that have any selected metric not scheduled for them. This makes sure all
+ * metrics are using the same CPU set, as a result ratio metrics are consistent.
+ */
+static void profile_filter_cpus(__u32 num_cpu,
+ struct bpf_perf_event_value vals[MAX_NUM_PROFILE_METRICS][num_cpu],
+ __u64 *counts)
+{
+ __u32 m, cpu, key = 0;
+
+ for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+ if (!metrics[m].selected)
+ continue;
+
+ for (cpu = 0; cpu < num_cpu; cpu++) {
+ /*
+ * CPU has hits, but this metric never scheduled, set counts[cpu] to 0
+ * so other metrics ignore this CPU too
+ */
+ if (counts[cpu] && !vals[key][cpu].running) {
+ p_info("%s not scheduled on CPU %u; excluding %llu runs from all metrics",
+ metrics[m].name, cpu, counts[cpu]);
+ counts[cpu] = 0;
+ }
+ }
+ key++;
+ }
+}
+
+static int profile_read_values(struct profiler_bpf *obj)
{
__u32 m, cpu, num_cpu = obj->rodata->num_cpu;
+ struct bpf_perf_event_value values[MAX_NUM_PROFILE_METRICS][num_cpu], *val;
int reading_map_fd, count_map_fd;
__u64 counts[num_cpu];
__u32 key = 0;
@@ -2194,38 +2241,61 @@ static void profile_read_values(struct profiler_bpf *obj)
count_map_fd = bpf_map__fd(obj->maps.counts);
if (reading_map_fd < 0 || count_map_fd < 0) {
p_err("failed to get fd for map");
- return;
+ return min(reading_map_fd, count_map_fd);
}
err = bpf_map_lookup_elem(count_map_fd, &key, counts);
if (err) {
p_err("failed to read count_map: %s", strerror(errno));
- return;
+ return err;
+ }
+
+ for (m = 0; m < ARRAY_SIZE(metrics); m++) {
+ if (!metrics[m].selected)
+ continue;
+
+ err = bpf_map_lookup_elem(reading_map_fd, &key, values[key]);
+ if (err) {
+ p_err("failed to read reading_map: %s", strerror(errno));
+ return err;
+ }
+ key++;
}
profile_total_count = 0;
for (cpu = 0; cpu < num_cpu; cpu++)
profile_total_count += counts[cpu];
+ profile_filter_cpus(num_cpu, values, counts);
+
+ profile_valid_count = 0;
+ for (cpu = 0; cpu < num_cpu; cpu++)
+ profile_valid_count += counts[cpu];
+
+ key = 0;
for (m = 0; m < ARRAY_SIZE(metrics); m++) {
- struct bpf_perf_event_value values[num_cpu];
+ double scale;
if (!metrics[m].selected)
continue;
- err = bpf_map_lookup_elem(reading_map_fd, &key, values);
- if (err) {
- p_err("failed to read reading_map: %s",
- strerror(errno));
- return;
- }
for (cpu = 0; cpu < num_cpu; cpu++) {
- metrics[m].val.counter += values[cpu].counter;
- metrics[m].val.enabled += values[cpu].enabled;
- metrics[m].val.running += values[cpu].running;
+ /* Skip CPUs with no runs or with an unscheduled metric. */
+ if (!counts[cpu])
+ continue;
+
+ val = &values[key][cpu];
+
+ metrics[m].val.enabled += val->enabled;
+ metrics[m].val.running += val->running;
+ metrics[m].val.counter += val->counter;
+ /* Scale counter values to account for perf event multiplexing. */
+ scale = (double)val->enabled / val->running;
+ metrics[m].scaled_val += val->counter * scale;
}
key++;
}
+ return 0;
}
static void profile_print_readings_json(void)
@@ -2239,9 +2309,11 @@ static void profile_print_readings_json(void)
jsonw_start_object(json_wtr);
jsonw_string_field(json_wtr, "metric", metrics[m].name);
jsonw_lluint_field(json_wtr, "run_cnt", profile_total_count);
+ jsonw_lluint_field(json_wtr, "run_cnt_valid", profile_valid_count);
jsonw_lluint_field(json_wtr, "value", metrics[m].val.counter);
jsonw_lluint_field(json_wtr, "enabled", metrics[m].val.enabled);
jsonw_lluint_field(json_wtr, "running", metrics[m].val.running);
+ jsonw_lluint_field(json_wtr, "value_scaled", metrics[m].scaled_val);
jsonw_end_object(json_wtr);
}
@@ -2250,24 +2322,34 @@ static void profile_print_readings_json(void)
static void profile_print_readings_plain(void)
{
- __u32 m;
+ __u32 i;
printf("\n%18llu %-20s\n", profile_total_count, "run_cnt");
- for (m = 0; m < ARRAY_SIZE(metrics); m++) {
- struct bpf_perf_event_value *val = &metrics[m].val;
+ for (i = 0; i < ARRAY_SIZE(metrics); i++) {
+ struct profile_metric *m = &metrics[i];
+ struct bpf_perf_event_value *val = &m->val;
int r;
+ __u64 ratio;
- if (!metrics[m].selected)
+ if (!m->selected)
continue;
- printf("%18llu %-20s", val->counter, metrics[m].name);
+ printf("%18llu %-20s", m->scaled_val, m->name);
- r = metrics[m].ratio_metric - 1;
- if (r >= 0 && metrics[r].selected &&
- metrics[r].val.counter > 0) {
+ r = m->ratio_metric;
+ switch (r) {
+ case METRIC_RUN_CNT:
+ ratio = profile_valid_count;
+ break;
+ case METRIC_NONE:
+ ratio = 0;
+ break;
+ default:
+ ratio = metrics[r].scaled_val;
+ }
+ if (ratio) {
printf("# %8.2f %-30s",
- val->counter * metrics[m].ratio_mul /
- metrics[r].val.counter,
- metrics[m].ratio_desc);
+ m->scaled_val * m->ratio_mul / ratio,
+ m->ratio_desc);
} else {
printf("%-41s", "");
}
@@ -2423,9 +2505,12 @@ static int profile_open_perf_events(struct profiler_bpf *obj)
static void profile_print_and_cleanup(void)
{
+ int err;
+
profile_close_perf_events(profile_obj);
- profile_read_values(profile_obj);
- profile_print_readings();
+ err = profile_read_values(profile_obj);
+ if (!err)
+ profile_print_readings();
profiler_bpf__destroy(profile_obj);
close(profile_tgt_fd);
diff --git a/tools/bpf/bpftool/skeleton/profiler.bpf.c b/tools/bpf/bpftool/skeleton/profiler.bpf.c
index f48c783cb9f7f..6c654bd9b346f 100644
--- a/tools/bpf/bpftool/skeleton/profiler.bpf.c
+++ b/tools/bpf/bpftool/skeleton/profiler.bpf.c
@@ -10,6 +10,11 @@ struct bpf_perf_event_value___local {
__u64 running;
} __attribute__((preserve_access_index));
+struct profile_reading {
+ struct bpf_perf_event_value___local value;
+ bool armed;
+};
+
/* map of perf event fds, num_cpu * num_metric entries */
struct {
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
@@ -21,7 +26,7 @@ struct {
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
__uint(key_size, sizeof(u32));
- __uint(value_size, sizeof(struct bpf_perf_event_value___local));
+ __uint(value_size, sizeof(struct profile_reading));
} fentry_readings SEC(".maps");
/* accumulated readings */
@@ -45,7 +50,7 @@ const volatile __u32 num_metric = 1;
SEC("fentry/XXX")
int BPF_PROG(fentry_XXX)
{
- struct bpf_perf_event_value___local *ptrs[MAX_NUM_METRICS];
+ struct profile_reading *ptrs[MAX_NUM_METRICS];
u32 key = bpf_get_smp_processor_id();
u32 i;
@@ -56,6 +61,7 @@ int BPF_PROG(fentry_XXX)
ptrs[i] = bpf_map_lookup_elem(&fentry_readings, &flag);
if (!ptrs[i])
return 0;
+ ptrs[i]->armed = false;
}
for (i = 0; i < num_metric && i < MAX_NUM_METRICS; i++) {
@@ -66,7 +72,8 @@ int BPF_PROG(fentry_XXX)
sizeof(reading));
if (err)
return 0;
- *(ptrs[i]) = reading;
+ ptrs[i]->value = reading;
+ ptrs[i]->armed = true;
key += num_cpu;
}
@@ -76,16 +83,18 @@ int BPF_PROG(fentry_XXX)
static inline void
fexit_update_maps(u32 id, struct bpf_perf_event_value___local *after)
{
- struct bpf_perf_event_value___local *before, diff;
+ struct profile_reading *before;
+ struct bpf_perf_event_value___local diff;
before = bpf_map_lookup_elem(&fentry_readings, &id);
/* only account samples with a valid fentry_reading */
- if (before && before->counter) {
+ if (before && before->armed) {
struct bpf_perf_event_value___local *accum;
- diff.counter = after->counter - before->counter;
- diff.enabled = after->enabled - before->enabled;
- diff.running = after->running - before->running;
+ before->armed = false;
+ diff.counter = after->counter - before->value.counter;
+ diff.enabled = after->enabled - before->value.enabled;
+ diff.running = after->running - before->value.running;
accum = bpf_map_lookup_elem(&accum_readings, &id);
if (accum) {
diff --git a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
index 97037d3b3d9fa..7bc0db26e0050 100644
--- a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
+++ b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
@@ -4,6 +4,11 @@
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
+struct profile_reading {
+ struct bpf_perf_event_value value;
+ bool armed;
+};
+
/* map of perf event fds, num_cpu * num_metric entries */
struct {
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
@@ -15,7 +20,7 @@ struct {
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
__uint(key_size, sizeof(__u32));
- __uint(value_size, sizeof(struct bpf_perf_event_value));
+ __uint(value_size, sizeof(struct profile_reading));
__uint(max_entries, 1);
} fentry_readings SEC(".maps");
@@ -33,7 +38,7 @@ SEC("fentry/XXX")
int BPF_PROG(fentry_XXX)
{
__u32 key = bpf_get_smp_processor_id();
- struct bpf_perf_event_value *ptr;
+ struct profile_reading *ptr;
__u32 zero = 0;
long err;
@@ -42,9 +47,12 @@ int BPF_PROG(fentry_XXX)
if (!ptr)
return 0;
- err = bpf_perf_event_read_value(&events, key, ptr, sizeof(*ptr));
+ ptr->armed = false;
+ err = bpf_perf_event_read_value(&events, key, &ptr->value,
+ sizeof(ptr->value));
if (err)
return 0;
+ ptr->armed = true;
return 0;
}
@@ -52,17 +60,19 @@ int BPF_PROG(fentry_XXX)
static inline void
fexit_update_maps(struct bpf_perf_event_value *after)
{
- struct bpf_perf_event_value *before, diff;
+ struct profile_reading *before;
+ struct bpf_perf_event_value diff;
__u32 zero = 0;
before = bpf_map_lookup_elem(&fentry_readings, &zero);
/* only account samples with a valid fentry_reading */
- if (before && before->counter) {
+ if (before && before->armed) {
struct bpf_perf_event_value *accum;
- diff.counter = after->counter - before->counter;
- diff.enabled = after->enabled - before->enabled;
- diff.running = after->running - before->running;
+ before->armed = false;
+ diff.counter = after->counter - before->value.counter;
+ diff.enabled = after->enabled - before->value.enabled;
+ diff.running = after->running - before->value.running;
accum = bpf_map_lookup_elem(&accum_readings, &zero);
if (accum) {
|
| 3/2 | 2026/09/08 19:08 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 8817 output: 69 thoughts: 525 Thoughts: **Patch Analysis: Non-Kernel Impact** Okay, let's break down this patch. My initial scan shows changes across four files: `tools/bpf/bpftool/Documentation/bpftool-prog.rst`, `tools/bpf/bpftool/prog.c`, `tools/bpf/bpftool/skeleton/profiler.bpf.c`, and `tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c`. All contained within the `tools/` directory – specifically `tools/bpf/bpftool` and `tools/perf`. Now, according to the usual criteria – section 2 regarding when *not* to fuzz – any modifications to documentation, comments, spelling fixes, or user-space directories, like `tools/`, samples/, scripts/, etc., that *don't* impact `vmlinux` or kernel modules, don't warrant fuzzing. Looking at these files specifically: `tools/bpf/bpftool/Documentation/bpftool-prog.rst` is documentation. `tools/bpf/bpftool/prog.c` is the user-space `bpftool` utility. The other two `tools/bpf/bpftool/skeleton/profiler.bpf.c` and `tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c` are BPF skeleton programs *for* these user-space tools. They're not compiled into the kernel. I'm confident these changes are isolated to user-space tools. I'll quickly double-check that kernel code isn't indirectly modified. A quick `grep` or file inspection should confirm this is the case. But, given the file paths, I don't expect to find anything kernel-related. Therefore, this patch doesn't impact kernel image or kernel modules. So, no fuzzing needed. I'm setting `WorthFuzzing` to `false`. No `EnableConfigs` or `FocusSymbols` are required. The rationale is the patch is confined to userspace `tools` (bpftool and perf) which are user-space tools, along with their related documentation and skeleton code. Alright, let's call `set-results`. |
| 4/2 | 2026/09/08 19:08 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The patch modifies only user-space tools and documentation under tools/ (bpftool and perf prog profiler skeletons). No kernel source files or kernel modules affecting vmlinux are modified.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies only user-space tools and documentation under tools/ (bpftool and perf prog profiler skeletons). No kernel source files or kernel modules affecting vmlinux are modified.",
"WorthFuzzing": false
} |
| 5/1 | 2026/09/08 19:08 | 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) |
|---|