AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/09/28 11:32 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "KMSANReasoning": "",
  "NeedsKMSAN": false,
  "Reasoning": "The patch exclusively modifies tools/mm/slabinfo.c, which is a userspace tool located in tools/ and does not affect the compiled kernel image (vmlinux) or kernel modules. Per the triage criteria, non-kernel userspace tools are not targets for syzkaller kernel fuzzing.",
  "WorthFuzzing": false
}
1/1 2026/09/28 11:32 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit 1ea2d6b9d3645d9a2272f0d77e33c4bbef7d9792\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Mon Sep 28 11:32:29 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/mm/slabinfo.c b/tools/mm/slabinfo.c\nindex 48d1ee8b0e818..dbc72582ffabd 100644\n--- a/tools/mm/slabinfo.c\n+++ b/tools/mm/slabinfo.c\n@@ -27,25 +27,57 @@\n \n struct slabinfo {\n \tchar *name;\n-\tint alias;\n \tint refs;\n-\tint aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;\n-\tunsigned int hwcache_align, object_size, objs_per_slab;\n-\tunsigned int sanity_checks, slab_size, store_user, trace;\n-\tint order, poison, reclaim_account, red_zone;\n-\tunsigned long partial, objects, slabs, objects_partial, total_objects;\n+\tint numa_slabs[MAX_NODES];\n+\tint numa_partial[MAX_NODES];\n+\n+\tunsigned int slab_size, object_size;\n+\tunsigned int objs_per_slab, order;\n+\tunsigned int sheaf_capacity;\n+\tunsigned long objects_partial, partial;\n+\tint aliases;\n+\tunsigned int align;\n+\tint hwcache_align;\n+\tint reclaim_account;\n+\tint destroy_by_rcu;\n+\n+\t/* CONFIG_SLUB_DEBUG */\n+\tunsigned long total_objects, objects, slabs;\n+\tint sanity_checks, trace, red_zone, poison, store_user;\n+\n+\t/* CONFIG_ZONE_DMA */\n+\tint cache_dma;\n+\n+\t/* CONFIG_SLUB_STATS */\n \tunsigned long alloc_fastpath, alloc_slowpath;\n+\tunsigned long free_rcu_sheaf, free_rcu_sheaf_fail;\n \tunsigned long free_fastpath, free_slowpath;\n-\tunsigned long free_frozen, free_add_partial, free_remove_partial;\n-\tunsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;\n-\tunsigned long cpuslab_flush, deactivate_full, deactivate_empty;\n+\tunsigned long free_add_partial, free_remove_partial;\n+\tunsigned long alloc_slab, alloc_node_mismatch, free_slab;\n+\tunsigned long order_fallback;\n+\tunsigned long cmpxchg_double_fail;\n+\n+\tunsigned long sheaf_flush, sheaf_refill, sheaf_alloc, sheaf_free;\n+\tunsigned long barn_get, barn_get_fail, barn_put, barn_put_fail;\n+\tunsigned long sheaf_prefill_fast, sheaf_prefill_slow,\n+\t\tsheaf_prefill_oversize;\n+\tunsigned long sheaf_return_fast, sheaf_return_slow;\n+\n+\t/*\n+\t * Deprecated files:\n+\t * No STAT_ATTR()/SLAB_ATTR() for these exists in mm/slub.c's\n+\t * slab_attrs[] anymore. Although cpu_slabs remains as a file,\n+\t * it is also outdated and always prints 0. Keep these for backward\n+\t * compatibility, but they should be removed later.\n+\t */\n+\tint cpu_slabs;\n+\tunsigned long free_frozen;\n \tunsigned long deactivate_to_head, deactivate_to_tail;\n-\tunsigned long deactivate_remote_frees, order_fallback;\n-\tunsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;\n-\tunsigned long alloc_node_mismatch, deactivate_bypass;\n+\tunsigned long alloc_from_partial, alloc_refill;\n+\tunsigned long cpuslab_flush, deactivate_full, deactivate_empty;\n+\tunsigned long deactivate_remote_frees, deactivate_bypass;\n+\tunsigned long cmpxchg_double_cpu_fail;\n \tunsigned long cpu_partial_alloc, cpu_partial_free;\n-\tint numa[MAX_NODES];\n-\tint numa_partial[MAX_NODES];\n } slabinfo[MAX_SLABS];\n \n struct aliasinfo {\n@@ -174,6 +206,30 @@ static unsigned long read_obj(const char *name)\n \treturn strlen(buffer);\n }\n \n+static void decode_numa_list(int *numa, char *t)\n+{\n+\tint node;\n+\tint nr;\n+\n+\tmemset(numa, 0, MAX_NODES * sizeof(int));\n+\n+\tif (!t)\n+\t\treturn;\n+\n+\twhile (*t == 'N') {\n+\t\tt++;\n+\t\tnode = strtoul(t, \u0026t, 10);\n+\t\tif (*t == '=') {\n+\t\t\tt++;\n+\t\t\tnr = strtoul(t, \u0026t, 10);\n+\t\t\tnuma[node] = nr;\n+\t\t\tif (node \u003e highest_node)\n+\t\t\t\thighest_node = node;\n+\t\t}\n+\t\twhile (*t == ' ')\n+\t\t\tt++;\n+\t}\n+}\n \n /*\n  * Get the contents of an attribute\n@@ -186,21 +242,19 @@ static unsigned long get_obj(const char *name)\n \treturn atol(buffer);\n }\n \n-static unsigned long get_obj_and_str(const char *name, char **x)\n+static unsigned long get_obj_and_decode(int *numa, const char *name)\n {\n \tunsigned long result = 0;\n \tchar *p;\n \n-\t*x = NULL;\n-\n \tif (!read_obj(name))\n \t\treturn 0;\n \n \tresult = strtoul(buffer, \u0026p, 10);\n \twhile (*p == ' ')\n \t\tp++;\n-\tif (*p)\n-\t\t*x = strdup(p);\n+\n+\tdecode_numa_list(numa, p);\n \treturn result;\n }\n \n@@ -293,31 +347,6 @@ static int store_size(char *buffer, unsigned long value)\n \treturn n;\n }\n \n-static void decode_numa_list(int *numa, char *t)\n-{\n-\tint node;\n-\tint nr;\n-\n-\tmemset(numa, 0, MAX_NODES * sizeof(int));\n-\n-\tif (!t)\n-\t\treturn;\n-\n-\twhile (*t == 'N') {\n-\t\tt++;\n-\t\tnode = strtoul(t, \u0026t, 10);\n-\t\tif (*t == '=') {\n-\t\t\tt++;\n-\t\t\tnr = strtoul(t, \u0026t, 10);\n-\t\t\tnuma[node] = nr;\n-\t\t\tif (node \u003e highest_node)\n-\t\t\t\thighest_node = node;\n-\t\t}\n-\t\twhile (*t == ' ')\n-\t\t\tt++;\n-\t}\n-}\n-\n static void slab_validate(struct slabinfo *s)\n {\n \tif (strcmp(s-\u003ename, \"*\") == 0)\n@@ -410,7 +439,7 @@ static void slab_numa(struct slabinfo *s, int mode)\n \tfor(node = 0; node \u003c= highest_node; node++) {\n \t\tchar b[20];\n \n-\t\tstore_size(b, s-\u003enuma[node]);\n+\t\tstore_size(b, s-\u003enuma_slabs[node]);\n \t\tprintf(\" %4s\", b);\n \t}\n \tprintf(\"\\n\");\n@@ -553,6 +582,39 @@ static void slab_stats(struct slabinfo *s)\n \t}\n }\n \n+static void sheaf_stats(struct slabinfo *s)\n+{\n+\tif (!s-\u003esheaf_capacity)\n+\t\treturn;\n+\n+\tprintf(\"\\nSheaf capacity       %8u objects\\n\", s-\u003esheaf_capacity);\n+\n+\tprintf(\"\\nSheaf Perf Counter    Success     Fail\\n\");\n+\tprintf(\"--------------------------------------------------\\n\");\n+\tprintf(\"Barn get             %8lu %8lu\\n\",\n+\t\ts-\u003ebarn_get, s-\u003ebarn_get_fail);\n+\tprintf(\"Barn put             %8lu %8lu\\n\",\n+\t\ts-\u003ebarn_put, s-\u003ebarn_put_fail);\n+\tprintf(\"RCU sheaf free       %8lu %8lu\\n\",\n+\t\ts-\u003efree_rcu_sheaf, s-\u003efree_rcu_sheaf_fail);\n+\n+\tprintf(\"\\nSheaf API Counter        Fast     Slow\\n\");\n+\tprintf(\"--------------------------------------------------\\n\");\n+\tprintf(\"Prefill              %8lu %8lu\\n\",\n+\t\ts-\u003esheaf_prefill_fast, s-\u003esheaf_prefill_slow);\n+\tprintf(\"Return               %8lu %8lu\\n\",\n+\t\ts-\u003esheaf_return_fast, s-\u003esheaf_return_slow);\n+\n+\tprintf(\"\\nSheaf Objects/Allocations\\n\");\n+\tprintf(\"--------------------------------------------------\\n\");\n+\tprintf(\"Objects flushed to slabs      %8lu\\n\", s-\u003esheaf_flush);\n+\tprintf(\"Objects refilled into sheaves %8lu\\n\", s-\u003esheaf_refill);\n+\tprintf(\"Sheaves allocated             %8lu\\n\", s-\u003esheaf_alloc);\n+\tprintf(\"Sheaves freed                 %8lu\\n\", s-\u003esheaf_free);\n+\tprintf(\"Oversize sheaves for prefill  %8lu\\n\",\n+\t\ts-\u003esheaf_prefill_oversize);\n+}\n+\n static void report(struct slabinfo *s)\n {\n \tif (strcmp(s-\u003ename, \"*\") == 0)\n@@ -592,6 +654,7 @@ static void report(struct slabinfo *s)\n \tshow_tracking(s);\n \tslab_numa(s, 1);\n \tslab_stats(s);\n+\tsheaf_stats(s);\n }\n \n static void slabcache(struct slabinfo *s)\n@@ -1210,6 +1273,73 @@ static int slab_mismatch(char *slab)\n \treturn regexec(\u0026pattern, slab, 0, NULL, 0);\n }\n \n+static void fill_slabinfo(struct slabinfo *slab, const char *name)\n+{\n+\tslab-\u003ename = strdup(name);\n+\tslab-\u003erefs = 0;\n+\tslab-\u003ealiases = get_obj(\"aliases\");\n+\tslab-\u003ealign = get_obj(\"align\");\n+\tslab-\u003ecache_dma = get_obj(\"cache_dma\");\n+\tslab-\u003ecpu_slabs = get_obj(\"cpu_slabs\");\n+\tslab-\u003edestroy_by_rcu = get_obj(\"destroy_by_rcu\");\n+\tslab-\u003ehwcache_align = get_obj(\"hwcache_align\");\n+\tslab-\u003eobject_size = get_obj(\"object_size\");\n+\tslab-\u003eobjects = get_obj(\"objects\");\n+\tslab-\u003eobjects_partial = get_obj(\"objects_partial\");\n+\tslab-\u003etotal_objects = get_obj(\"total_objects\");\n+\tslab-\u003eobjs_per_slab = get_obj(\"objs_per_slab\");\n+\tslab-\u003eorder = get_obj(\"order\");\n+\tslab-\u003epartial = get_obj_and_decode(slab-\u003enuma_partial, \"partial\");\n+\tslab-\u003epoison = get_obj(\"poison\");\n+\tslab-\u003ereclaim_account = get_obj(\"reclaim_account\");\n+\tslab-\u003ered_zone = get_obj(\"red_zone\");\n+\tslab-\u003esanity_checks = get_obj(\"sanity_checks\");\n+\tslab-\u003eslab_size = get_obj(\"slab_size\");\n+\tslab-\u003eslabs = get_obj_and_decode(slab-\u003enuma_slabs, \"slabs\");\n+\tslab-\u003estore_user = get_obj(\"store_user\");\n+\tslab-\u003etrace = get_obj(\"trace\");\n+\tslab-\u003ealloc_fastpath = get_obj(\"alloc_fastpath\");\n+\tslab-\u003ealloc_slowpath = get_obj(\"alloc_slowpath\");\n+\tslab-\u003efree_fastpath = get_obj(\"free_fastpath\");\n+\tslab-\u003efree_slowpath = get_obj(\"free_slowpath\");\n+\tslab-\u003efree_frozen = get_obj(\"free_frozen\");\n+\tslab-\u003efree_add_partial = get_obj(\"free_add_partial\");\n+\tslab-\u003efree_remove_partial = get_obj(\"free_remove_partial\");\n+\tslab-\u003ealloc_from_partial = get_obj(\"alloc_from_partial\");\n+\tslab-\u003ealloc_slab = get_obj(\"alloc_slab\");\n+\tslab-\u003ealloc_refill = get_obj(\"alloc_refill\");\n+\tslab-\u003efree_slab = get_obj(\"free_slab\");\n+\tslab-\u003ecpuslab_flush = get_obj(\"cpuslab_flush\");\n+\tslab-\u003edeactivate_full = get_obj(\"deactivate_full\");\n+\tslab-\u003edeactivate_empty = get_obj(\"deactivate_empty\");\n+\tslab-\u003edeactivate_to_head = get_obj(\"deactivate_to_head\");\n+\tslab-\u003edeactivate_to_tail = get_obj(\"deactivate_to_tail\");\n+\tslab-\u003edeactivate_remote_frees = get_obj(\"deactivate_remote_frees\");\n+\tslab-\u003eorder_fallback = get_obj(\"order_fallback\");\n+\tslab-\u003ecmpxchg_double_cpu_fail = get_obj(\"cmpxchg_double_cpu_fail\");\n+\tslab-\u003ecmpxchg_double_fail = get_obj(\"cmpxchg_double_fail\");\n+\tslab-\u003ecpu_partial_alloc = get_obj(\"cpu_partial_alloc\");\n+\tslab-\u003ecpu_partial_free = get_obj(\"cpu_partial_free\");\n+\tslab-\u003ealloc_node_mismatch = get_obj(\"alloc_node_mismatch\");\n+\tslab-\u003edeactivate_bypass = get_obj(\"deactivate_bypass\");\n+\tslab-\u003esheaf_capacity = get_obj(\"sheaf_capacity\");\n+\tslab-\u003efree_rcu_sheaf = get_obj(\"free_rcu_sheaf\");\n+\tslab-\u003efree_rcu_sheaf_fail = get_obj(\"free_rcu_sheaf_fail\");\n+\tslab-\u003esheaf_flush = get_obj(\"sheaf_flush\");\n+\tslab-\u003esheaf_refill = get_obj(\"sheaf_refill\");\n+\tslab-\u003esheaf_alloc = get_obj(\"sheaf_alloc\");\n+\tslab-\u003esheaf_free = get_obj(\"sheaf_free\");\n+\tslab-\u003ebarn_get = get_obj(\"barn_get\");\n+\tslab-\u003ebarn_get_fail = get_obj(\"barn_get_fail\");\n+\tslab-\u003ebarn_put = get_obj(\"barn_put\");\n+\tslab-\u003ebarn_put_fail = get_obj(\"barn_put_fail\");\n+\tslab-\u003esheaf_prefill_fast = get_obj(\"sheaf_prefill_fast\");\n+\tslab-\u003esheaf_prefill_slow = get_obj(\"sheaf_prefill_slow\");\n+\tslab-\u003esheaf_prefill_oversize = get_obj(\"sheaf_prefill_oversize\");\n+\tslab-\u003esheaf_return_fast = get_obj(\"sheaf_return_fast\");\n+\tslab-\u003esheaf_return_slow = get_obj(\"sheaf_return_slow\");\n+}\n+\n static void read_slab_dir(void)\n {\n \tDIR *dir;\n@@ -1217,7 +1347,6 @@ static void read_slab_dir(void)\n \tstruct slabinfo *slab = slabinfo;\n \tstruct aliasinfo *alias = aliasinfo;\n \tchar *p;\n-\tchar *t;\n \tint count;\n \n \tif (chdir(\"/sys/kernel/slab\") \u0026\u0026 chdir(\"/sys/slab\"))\n@@ -1226,14 +1355,14 @@ static void read_slab_dir(void)\n \tdir = opendir(\".\");\n \twhile ((de = readdir(dir))) {\n \t\tif (de-\u003ed_name[0] == '.' ||\n-\t\t\t(de-\u003ed_name[0] != ':' \u0026\u0026 slab_mismatch(de-\u003ed_name)))\n-\t\t\t\tcontinue;\n+\t\t    (de-\u003ed_name[0] != ':' \u0026\u0026 slab_mismatch(de-\u003ed_name)))\n+\t\t\tcontinue;\n \t\tswitch (de-\u003ed_type) {\n-\t\t   case DT_LNK:\n+\t\tcase DT_LNK:\n \t\t\tif (alias - aliasinfo == MAX_ALIASES)\n \t\t\t\tfatal(\"Too many aliases\\n\");\n \t\t\talias-\u003ename = strdup(de-\u003ed_name);\n-\t\t\tcount = readlink(de-\u003ed_name, buffer, sizeof(buffer)-1);\n+\t\t\tcount = readlink(de-\u003ed_name, buffer, sizeof(buffer) - 1);\n \n \t\t\tif (count \u003c 0)\n \t\t\t\tfatal(\"Cannot read symlink %s\\n\", de-\u003ed_name);\n@@ -1245,71 +1374,21 @@ static void read_slab_dir(void)\n \t\t\talias-\u003eref = strdup(p);\n \t\t\talias++;\n \t\t\tbreak;\n-\t\t   case DT_DIR:\n+\t\tcase DT_DIR:\n \t\t\tif (slab - slabinfo == MAX_SLABS)\n \t\t\t\tfatal(\"Too many slabs\\n\");\n \t\t\tif (chdir(de-\u003ed_name))\n \t\t\t\tfatal(\"Unable to access slab %s\\n\", slab-\u003ename);\n-\t\t\tslab-\u003ename = strdup(de-\u003ed_name);\n-\t\t\tslab-\u003ealias = 0;\n-\t\t\tslab-\u003erefs = 0;\n-\t\t\tslab-\u003ealiases = get_obj(\"aliases\");\n-\t\t\tslab-\u003ealign = get_obj(\"align\");\n-\t\t\tslab-\u003ecache_dma = get_obj(\"cache_dma\");\n-\t\t\tslab-\u003ecpu_slabs = get_obj(\"cpu_slabs\");\n-\t\t\tslab-\u003edestroy_by_rcu = get_obj(\"destroy_by_rcu\");\n-\t\t\tslab-\u003ehwcache_align = get_obj(\"hwcache_align\");\n-\t\t\tslab-\u003eobject_size = get_obj(\"object_size\");\n-\t\t\tslab-\u003eobjects = get_obj(\"objects\");\n-\t\t\tslab-\u003eobjects_partial = get_obj(\"objects_partial\");\n-\t\t\tslab-\u003etotal_objects = get_obj(\"total_objects\");\n-\t\t\tslab-\u003eobjs_per_slab = get_obj(\"objs_per_slab\");\n-\t\t\tslab-\u003eorder = get_obj(\"order\");\n-\t\t\tslab-\u003epartial = get_obj_and_str(\"partial\", \u0026t);\n-\t\t\tdecode_numa_list(slab-\u003enuma_partial, t);\n-\t\t\tfree(t);\n-\t\t\tslab-\u003epoison = get_obj(\"poison\");\n-\t\t\tslab-\u003ereclaim_account = get_obj(\"reclaim_account\");\n-\t\t\tslab-\u003ered_zone = get_obj(\"red_zone\");\n-\t\t\tslab-\u003esanity_checks = get_obj(\"sanity_checks\");\n-\t\t\tslab-\u003eslab_size = get_obj(\"slab_size\");\n-\t\t\tslab-\u003eslabs = get_obj_and_str(\"slabs\", \u0026t);\n-\t\t\tdecode_numa_list(slab-\u003enuma, t);\n-\t\t\tfree(t);\n-\t\t\tslab-\u003estore_user = get_obj(\"store_user\");\n-\t\t\tslab-\u003etrace = get_obj(\"trace\");\n-\t\t\tslab-\u003ealloc_fastpath = get_obj(\"alloc_fastpath\");\n-\t\t\tslab-\u003ealloc_slowpath = get_obj(\"alloc_slowpath\");\n-\t\t\tslab-\u003efree_fastpath = get_obj(\"free_fastpath\");\n-\t\t\tslab-\u003efree_slowpath = get_obj(\"free_slowpath\");\n-\t\t\tslab-\u003efree_frozen= get_obj(\"free_frozen\");\n-\t\t\tslab-\u003efree_add_partial = get_obj(\"free_add_partial\");\n-\t\t\tslab-\u003efree_remove_partial = get_obj(\"free_remove_partial\");\n-\t\t\tslab-\u003ealloc_from_partial = get_obj(\"alloc_from_partial\");\n-\t\t\tslab-\u003ealloc_slab = get_obj(\"alloc_slab\");\n-\t\t\tslab-\u003ealloc_refill = get_obj(\"alloc_refill\");\n-\t\t\tslab-\u003efree_slab = get_obj(\"free_slab\");\n-\t\t\tslab-\u003ecpuslab_flush = get_obj(\"cpuslab_flush\");\n-\t\t\tslab-\u003edeactivate_full = get_obj(\"deactivate_full\");\n-\t\t\tslab-\u003edeactivate_empty = get_obj(\"deactivate_empty\");\n-\t\t\tslab-\u003edeactivate_to_head = get_obj(\"deactivate_to_head\");\n-\t\t\tslab-\u003edeactivate_to_tail = get_obj(\"deactivate_to_tail\");\n-\t\t\tslab-\u003edeactivate_remote_frees = get_obj(\"deactivate_remote_frees\");\n-\t\t\tslab-\u003eorder_fallback = get_obj(\"order_fallback\");\n-\t\t\tslab-\u003ecmpxchg_double_cpu_fail = get_obj(\"cmpxchg_double_cpu_fail\");\n-\t\t\tslab-\u003ecmpxchg_double_fail = get_obj(\"cmpxchg_double_fail\");\n-\t\t\tslab-\u003ecpu_partial_alloc = get_obj(\"cpu_partial_alloc\");\n-\t\t\tslab-\u003ecpu_partial_free = get_obj(\"cpu_partial_free\");\n-\t\t\tslab-\u003ealloc_node_mismatch = get_obj(\"alloc_node_mismatch\");\n-\t\t\tslab-\u003edeactivate_bypass = get_obj(\"deactivate_bypass\");\n+\n+\t\t\tfill_slabinfo(slab, de-\u003ed_name);\n+\n \t\t\tif (chdir(\"..\"))\n-\t\t\t\tfatal(\"Unable to chdir from slab ../%s\\n\",\n-\t\t\t\t      slab-\u003ename);\n+\t\t\t\tfatal(\"Unable to chdir from slab ../%s\\n\", slab-\u003ename);\n \t\t\tif (slab-\u003ename[0] == ':')\n \t\t\t\talias_targets++;\n \t\t\tslab++;\n \t\t\tbreak;\n-\t\t   default :\n+\t\tdefault:\n \t\t\tfatal(\"Unknown file type %lx\\n\", de-\u003ed_type);\n \t\t}\n \t}\n@@ -1324,12 +1403,7 @@ static void output_slabs(void)\n \tstruct slabinfo *slab;\n \tint lines = output_lines;\n \n-\tfor (slab = slabinfo; (slab \u003c slabinfo + slabs) \u0026\u0026\n-\t\t\tlines != 0; slab++) {\n-\n-\t\tif (slab-\u003ealias)\n-\t\t\tcontinue;\n-\n+\tfor (slab = slabinfo; (slab \u003c slabinfo + slabs) \u0026\u0026 lines != 0; slab++) {\n \t\tif (lines != -1)\n \t\t\tlines--;\n \n@@ -1528,9 +1602,10 @@ int main(int argc, char *argv[])\n \n \terr = regcomp(\u0026pattern, pattern_source, REG_ICASE|REG_NOSUB);\n \tif (err)\n-\t\tfatal(\"%s: Invalid pattern '%s' code %d\\n\",\n-\t\t\targv[0], pattern_source, err);\n+\t\tfatal(\"%s: Invalid pattern '%s' code %d\\n\", argv[0], pattern_source, err);\n+\n \tread_slab_dir();\n+\n \tif (show_alias) {\n \t\talias();\n \t} else if (extended_totals) {\n"
}
2/1 2026/09/28 11:32 agent patch-evaluator
0m Model: 
core

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch exclusively modifies tools/mm/slabinfo.c, which is a userspace tool located in tools/ and does not affect the compiled kernel image (vmlinux) or kernel modules. Per the triage criteria, non-kernel userspace tools are not targets for syzkaller kernel fuzzing.",
  "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 1ea2d6b9d3645d9a2272f0d77e33c4bbef7d9792
Author: syz-cluster <triage@syzkaller.com>
Date:   Mon Sep 28 11:32:29 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/mm/slabinfo.c b/tools/mm/slabinfo.c
index 48d1ee8b0e818..dbc72582ffabd 100644
--- a/tools/mm/slabinfo.c
+++ b/tools/mm/slabinfo.c
@@ -27,25 +27,57 @@
 
 struct slabinfo {
 	char *name;
-	int alias;
 	int refs;
-	int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
-	unsigned int hwcache_align, object_size, objs_per_slab;
-	unsigned int sanity_checks, slab_size, store_user, trace;
-	int order, poison, reclaim_account, red_zone;
-	unsigned long partial, objects, slabs, objects_partial, total_objects;
+	int numa_slabs[MAX_NODES];
+	int numa_partial[MAX_NODES];
+
+	unsigned int slab_size, object_size;
+	unsigned int objs_per_slab, order;
+	unsigned int sheaf_capacity;
+	unsigned long objects_partial, partial;
+	int aliases;
+	unsigned int align;
+	int hwcache_align;
+	int reclaim_account;
+	int destroy_by_rcu;
+
+	/* CONFIG_SLUB_DEBUG */
+	unsigned long total_objects, objects, slabs;
+	int sanity_checks, trace, red_zone, poison, store_user;
+
+	/* CONFIG_ZONE_DMA */
+	int cache_dma;
+
+	/* CONFIG_SLUB_STATS */
 	unsigned long alloc_fastpath, alloc_slowpath;
+	unsigned long free_rcu_sheaf, free_rcu_sheaf_fail;
 	unsigned long free_fastpath, free_slowpath;
-	unsigned long free_frozen, free_add_partial, free_remove_partial;
-	unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
-	unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+	unsigned long free_add_partial, free_remove_partial;
+	unsigned long alloc_slab, alloc_node_mismatch, free_slab;
+	unsigned long order_fallback;
+	unsigned long cmpxchg_double_fail;
+
+	unsigned long sheaf_flush, sheaf_refill, sheaf_alloc, sheaf_free;
+	unsigned long barn_get, barn_get_fail, barn_put, barn_put_fail;
+	unsigned long sheaf_prefill_fast, sheaf_prefill_slow,
+		sheaf_prefill_oversize;
+	unsigned long sheaf_return_fast, sheaf_return_slow;
+
+	/*
+	 * Deprecated files:
+	 * No STAT_ATTR()/SLAB_ATTR() for these exists in mm/slub.c's
+	 * slab_attrs[] anymore. Although cpu_slabs remains as a file,
+	 * it is also outdated and always prints 0. Keep these for backward
+	 * compatibility, but they should be removed later.
+	 */
+	int cpu_slabs;
+	unsigned long free_frozen;
 	unsigned long deactivate_to_head, deactivate_to_tail;
-	unsigned long deactivate_remote_frees, order_fallback;
-	unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
-	unsigned long alloc_node_mismatch, deactivate_bypass;
+	unsigned long alloc_from_partial, alloc_refill;
+	unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+	unsigned long deactivate_remote_frees, deactivate_bypass;
+	unsigned long cmpxchg_double_cpu_fail;
 	unsigned long cpu_partial_alloc, cpu_partial_free;
-	int numa[MAX_NODES];
-	int numa_partial[MAX_NODES];
 } slabinfo[MAX_SLABS];
 
 struct aliasinfo {
@@ -174,6 +206,30 @@ static unsigned long read_obj(const char *name)
 	return strlen(buffer);
 }
 
+static void decode_numa_list(int *numa, char *t)
+{
+	int node;
+	int nr;
+
+	memset(numa, 0, MAX_NODES * sizeof(int));
+
+	if (!t)
+		return;
+
+	while (*t == 'N') {
+		t++;
+		node = strtoul(t, &t, 10);
+		if (*t == '=') {
+			t++;
+			nr = strtoul(t, &t, 10);
+			numa[node] = nr;
+			if (node > highest_node)
+				highest_node = node;
+		}
+		while (*t == ' ')
+			t++;
+	}
+}
 
 /*
  * Get the contents of an attribute
@@ -186,21 +242,19 @@ static unsigned long get_obj(const char *name)
 	return atol(buffer);
 }
 
-static unsigned long get_obj_and_str(const char *name, char **x)
+static unsigned long get_obj_and_decode(int *numa, const char *name)
 {
 	unsigned long result = 0;
 	char *p;
 
-	*x = NULL;
-
 	if (!read_obj(name))
 		return 0;
 
 	result = strtoul(buffer, &p, 10);
 	while (*p == ' ')
 		p++;
-	if (*p)
-		*x = strdup(p);
+
+	decode_numa_list(numa, p);
 	return result;
 }
 
@@ -293,31 +347,6 @@ static int store_size(char *buffer, unsigned long value)
 	return n;
 }
 
-static void decode_numa_list(int *numa, char *t)
-{
-	int node;
-	int nr;
-
-	memset(numa, 0, MAX_NODES * sizeof(int));
-
-	if (!t)
-		return;
-
-	while (*t == 'N') {
-		t++;
-		node = strtoul(t, &t, 10);
-		if (*t == '=') {
-			t++;
-			nr = strtoul(t, &t, 10);
-			numa[node] = nr;
-			if (node > highest_node)
-				highest_node = node;
-		}
-		while (*t == ' ')
-			t++;
-	}
-}
-
 static void slab_validate(struct slabinfo *s)
 {
 	if (strcmp(s->name, "*") == 0)
@@ -410,7 +439,7 @@ static void slab_numa(struct slabinfo *s, int mode)
 	for(node = 0; node <= highest_node; node++) {
 		char b[20];
 
-		store_size(b, s->numa[node]);
+		store_size(b, s->numa_slabs[node]);
 		printf(" %4s", b);
 	}
 	printf("\n");
@@ -553,6 +582,39 @@ static void slab_stats(struct slabinfo *s)
 	}
 }
 
+static void sheaf_stats(struct slabinfo *s)
+{
+	if (!s->sheaf_capacity)
+		return;
+
+	printf("\nSheaf capacity       %8u objects\n", s->sheaf_capacity);
+
+	printf("\nSheaf Perf Counter    Success     Fail\n");
+	printf("--------------------------------------------------\n");
+	printf("Barn get             %8lu %8lu\n",
+		s->barn_get, s->barn_get_fail);
+	printf("Barn put             %8lu %8lu\n",
+		s->barn_put, s->barn_put_fail);
+	printf("RCU sheaf free       %8lu %8lu\n",
+		s->free_rcu_sheaf, s->free_rcu_sheaf_fail);
+
+	printf("\nSheaf API Counter        Fast     Slow\n");
+	printf("--------------------------------------------------\n");
+	printf("Prefill              %8lu %8lu\n",
+		s->sheaf_prefill_fast, s->sheaf_prefill_slow);
+	printf("Return               %8lu %8lu\n",
+		s->sheaf_return_fast, s->sheaf_return_slow);
+
+	printf("\nSheaf Objects/Allocations\n");
+	printf("--------------------------------------------------\n");
+	printf("Objects flushed to slabs      %8lu\n", s->sheaf_flush);
+	printf("Objects refilled into sheaves %8lu\n", s->sheaf_refill);
+	printf("Sheaves allocated             %8lu\n", s->sheaf_alloc);
+	printf("Sheaves freed                 %8lu\n", s->sheaf_free);
+	printf("Oversize sheaves for prefill  %8lu\n",
+		s->sheaf_prefill_oversize);
+}
+
 static void report(struct slabinfo *s)
 {
 	if (strcmp(s->name, "*") == 0)
@@ -592,6 +654,7 @@ static void report(struct slabinfo *s)
 	show_tracking(s);
 	slab_numa(s, 1);
 	slab_stats(s);
+	sheaf_stats(s);
 }
 
 static void slabcache(struct slabinfo *s)
@@ -1210,6 +1273,73 @@ static int slab_mismatch(char *slab)
 	return regexec(&pattern, slab, 0, NULL, 0);
 }
 
+static void fill_slabinfo(struct slabinfo *slab, const char *name)
+{
+	slab->name = strdup(name);
+	slab->refs = 0;
+	slab->aliases = get_obj("aliases");
+	slab->align = get_obj("align");
+	slab->cache_dma = get_obj("cache_dma");
+	slab->cpu_slabs = get_obj("cpu_slabs");
+	slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+	slab->hwcache_align = get_obj("hwcache_align");
+	slab->object_size = get_obj("object_size");
+	slab->objects = get_obj("objects");
+	slab->objects_partial = get_obj("objects_partial");
+	slab->total_objects = get_obj("total_objects");
+	slab->objs_per_slab = get_obj("objs_per_slab");
+	slab->order = get_obj("order");
+	slab->partial = get_obj_and_decode(slab->numa_partial, "partial");
+	slab->poison = get_obj("poison");
+	slab->reclaim_account = get_obj("reclaim_account");
+	slab->red_zone = get_obj("red_zone");
+	slab->sanity_checks = get_obj("sanity_checks");
+	slab->slab_size = get_obj("slab_size");
+	slab->slabs = get_obj_and_decode(slab->numa_slabs, "slabs");
+	slab->store_user = get_obj("store_user");
+	slab->trace = get_obj("trace");
+	slab->alloc_fastpath = get_obj("alloc_fastpath");
+	slab->alloc_slowpath = get_obj("alloc_slowpath");
+	slab->free_fastpath = get_obj("free_fastpath");
+	slab->free_slowpath = get_obj("free_slowpath");
+	slab->free_frozen = get_obj("free_frozen");
+	slab->free_add_partial = get_obj("free_add_partial");
+	slab->free_remove_partial = get_obj("free_remove_partial");
+	slab->alloc_from_partial = get_obj("alloc_from_partial");
+	slab->alloc_slab = get_obj("alloc_slab");
+	slab->alloc_refill = get_obj("alloc_refill");
+	slab->free_slab = get_obj("free_slab");
+	slab->cpuslab_flush = get_obj("cpuslab_flush");
+	slab->deactivate_full = get_obj("deactivate_full");
+	slab->deactivate_empty = get_obj("deactivate_empty");
+	slab->deactivate_to_head = get_obj("deactivate_to_head");
+	slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+	slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+	slab->order_fallback = get_obj("order_fallback");
+	slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
+	slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
+	slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
+	slab->cpu_partial_free = get_obj("cpu_partial_free");
+	slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
+	slab->deactivate_bypass = get_obj("deactivate_bypass");
+	slab->sheaf_capacity = get_obj("sheaf_capacity");
+	slab->free_rcu_sheaf = get_obj("free_rcu_sheaf");
+	slab->free_rcu_sheaf_fail = get_obj("free_rcu_sheaf_fail");
+	slab->sheaf_flush = get_obj("sheaf_flush");
+	slab->sheaf_refill = get_obj("sheaf_refill");
+	slab->sheaf_alloc = get_obj("sheaf_alloc");
+	slab->sheaf_free = get_obj("sheaf_free");
+	slab->barn_get = get_obj("barn_get");
+	slab->barn_get_fail = get_obj("barn_get_fail");
+	slab->barn_put = get_obj("barn_put");
+	slab->barn_put_fail = get_obj("barn_put_fail");
+	slab->sheaf_prefill_fast = get_obj("sheaf_prefill_fast");
+	slab->sheaf_prefill_slow = get_obj("sheaf_prefill_slow");
+	slab->sheaf_prefill_oversize = get_obj("sheaf_prefill_oversize");
+	slab->sheaf_return_fast = get_obj("sheaf_return_fast");
+	slab->sheaf_return_slow = get_obj("sheaf_return_slow");
+}
+
 static void read_slab_dir(void)
 {
 	DIR *dir;
@@ -1217,7 +1347,6 @@ static void read_slab_dir(void)
 	struct slabinfo *slab = slabinfo;
 	struct aliasinfo *alias = aliasinfo;
 	char *p;
-	char *t;
 	int count;
 
 	if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
@@ -1226,14 +1355,14 @@ static void read_slab_dir(void)
 	dir = opendir(".");
 	while ((de = readdir(dir))) {
 		if (de->d_name[0] == '.' ||
-			(de->d_name[0] != ':' && slab_mismatch(de->d_name)))
-				continue;
+		    (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+			continue;
 		switch (de->d_type) {
-		   case DT_LNK:
+		case DT_LNK:
 			if (alias - aliasinfo == MAX_ALIASES)
 				fatal("Too many aliases\n");
 			alias->name = strdup(de->d_name);
-			count = readlink(de->d_name, buffer, sizeof(buffer)-1);
+			count = readlink(de->d_name, buffer, sizeof(buffer) - 1);
 
 			if (count < 0)
 				fatal("Cannot read symlink %s\n", de->d_name);
@@ -1245,71 +1374,21 @@ static void read_slab_dir(void)
 			alias->ref = strdup(p);
 			alias++;
 			break;
-		   case DT_DIR:
+		case DT_DIR:
 			if (slab - slabinfo == MAX_SLABS)
 				fatal("Too many slabs\n");
 			if (chdir(de->d_name))
 				fatal("Unable to access slab %s\n", slab->name);
-			slab->name = strdup(de->d_name);
-			slab->alias = 0;
-			slab->refs = 0;
-			slab->aliases = get_obj("aliases");
-			slab->align = get_obj("align");
-			slab->cache_dma = get_obj("cache_dma");
-			slab->cpu_slabs = get_obj("cpu_slabs");
-			slab->destroy_by_rcu = get_obj("destroy_by_rcu");
-			slab->hwcache_align = get_obj("hwcache_align");
-			slab->object_size = get_obj("object_size");
-			slab->objects = get_obj("objects");
-			slab->objects_partial = get_obj("objects_partial");
-			slab->total_objects = get_obj("total_objects");
-			slab->objs_per_slab = get_obj("objs_per_slab");
-			slab->order = get_obj("order");
-			slab->partial = get_obj_and_str("partial", &t);
-			decode_numa_list(slab->numa_partial, t);
-			free(t);
-			slab->poison = get_obj("poison");
-			slab->reclaim_account = get_obj("reclaim_account");
-			slab->red_zone = get_obj("red_zone");
-			slab->sanity_checks = get_obj("sanity_checks");
-			slab->slab_size = get_obj("slab_size");
-			slab->slabs = get_obj_and_str("slabs", &t);
-			decode_numa_list(slab->numa, t);
-			free(t);
-			slab->store_user = get_obj("store_user");
-			slab->trace = get_obj("trace");
-			slab->alloc_fastpath = get_obj("alloc_fastpath");
-			slab->alloc_slowpath = get_obj("alloc_slowpath");
-			slab->free_fastpath = get_obj("free_fastpath");
-			slab->free_slowpath = get_obj("free_slowpath");
-			slab->free_frozen= get_obj("free_frozen");
-			slab->free_add_partial = get_obj("free_add_partial");
-			slab->free_remove_partial = get_obj("free_remove_partial");
-			slab->alloc_from_partial = get_obj("alloc_from_partial");
-			slab->alloc_slab = get_obj("alloc_slab");
-			slab->alloc_refill = get_obj("alloc_refill");
-			slab->free_slab = get_obj("free_slab");
-			slab->cpuslab_flush = get_obj("cpuslab_flush");
-			slab->deactivate_full = get_obj("deactivate_full");
-			slab->deactivate_empty = get_obj("deactivate_empty");
-			slab->deactivate_to_head = get_obj("deactivate_to_head");
-			slab->deactivate_to_tail = get_obj("deactivate_to_tail");
-			slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
-			slab->order_fallback = get_obj("order_fallback");
-			slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
-			slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
-			slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
-			slab->cpu_partial_free = get_obj("cpu_partial_free");
-			slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
-			slab->deactivate_bypass = get_obj("deactivate_bypass");
+
+			fill_slabinfo(slab, de->d_name);
+
 			if (chdir(".."))
-				fatal("Unable to chdir from slab ../%s\n",
-				      slab->name);
+				fatal("Unable to chdir from slab ../%s\n", slab->name);
 			if (slab->name[0] == ':')
 				alias_targets++;
 			slab++;
 			break;
-		   default :
+		default:
 			fatal("Unknown file type %lx\n", de->d_type);
 		}
 	}
@@ -1324,12 +1403,7 @@ static void output_slabs(void)
 	struct slabinfo *slab;
 	int lines = output_lines;
 
-	for (slab = slabinfo; (slab < slabinfo + slabs) &&
-			lines != 0; slab++) {
-
-		if (slab->alias)
-			continue;
-
+	for (slab = slabinfo; (slab < slabinfo + slabs) && lines != 0; slab++) {
 		if (lines != -1)
 			lines--;
 
@@ -1528,9 +1602,10 @@ int main(int argc, char *argv[])
 
 	err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
 	if (err)
-		fatal("%s: Invalid pattern '%s' code %d\n",
-			argv[0], pattern_source, err);
+		fatal("%s: Invalid pattern '%s' code %d\n", argv[0], pattern_source, err);
+
 	read_slab_dir();
+
 	if (show_alias) {
 		alias();
 	} else if (extended_totals) {

3/2 2026/09/28 11:32 llm patch-evaluator
0m Model: 
gemini-3.8-flash

Args: 
null

Results: 
null

Tokens: 
							input: 8345
							output: 27
							thoughts: 279

Thoughts: 
**Fuzzing Evaluation: slabinfo.c Patch**

Okay, so I need to decide if this patch series warrants a syzkaller fuzzing run. Let's see... the instructions say to review the changes, and it looks like the changes have already been merged to HEAD.

I'm looking at the diff now. Alright, it's just touching `tools/mm/slabinfo.c`. Hmm, right, that's a userspace tool! I need to double-check the criteria to make sure this doesn't accidentally trigger a false positive. Let's go back and look at the negative criteria in section 2. Essentially, I should flag this as "WorthFuzzing=false" if all the modified code falls into the categories of things that *don't* affect the kernel image, vmlinux, or any kernel modules. And one of those categories explicitly includes "User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/) that do not affect the compiled kernel image". Bingo! `tools/mm/slabinfo.c` fits that perfectly.

Just to be absolutely sure, let me check the commit with `git log -1 --stat`, just to confirm that nothing else was changed. The patch seems quite isolated, so I am confident that it does not.

Therefore, no fuzzing is needed in this case.

4/2 2026/09/28 11:32 tool grepper
0m Args: 
{
  "Expression": "sheaf_capacity",
  "PathPrefix": "tools/mm"
}

Results: 
{
  "Output": "tools/mm/slabinfo.c=28=struct slabinfo {\n--\ntools/mm/slabinfo.c-35-\tunsigned int objs_per_slab, order;\ntools/mm/slabinfo.c:36:\tunsigned int sheaf_capacity;\ntools/mm/slabinfo.c-37-\tunsigned long objects_partial, partial;\n--\ntools/mm/slabinfo.c=585=static void sheaf_stats(struct slabinfo *s)\ntools/mm/slabinfo.c-586-{\ntools/mm/slabinfo.c:587:\tif (!s-\u003esheaf_capacity)\ntools/mm/slabinfo.c-588-\t\treturn;\ntools/mm/slabinfo.c-589-\ntools/mm/slabinfo.c:590:\tprintf(\"\\nSheaf capacity       %8u objects\\n\", s-\u003esheaf_capacity);\ntools/mm/slabinfo.c-591-\n--\ntools/mm/slabinfo.c=1276=static void fill_slabinfo(struct slabinfo *slab, const char *name)\n--\ntools/mm/slabinfo.c-1324-\tslab-\u003edeactivate_bypass = get_obj(\"deactivate_bypass\");\ntools/mm/slabinfo.c:1325:\tslab-\u003esheaf_capacity = get_obj(\"sheaf_capacity\");\ntools/mm/slabinfo.c-1326-\tslab-\u003efree_rcu_sheaf = get_obj(\"free_rcu_sheaf\");\n"
}
5/2 2026/09/28 11:32 llm patch-evaluator
0m Model: 
gemini-3.8-flash

Args: 
null

Results: 
null

Tokens: 
							input: 9332
							output: 93
							thoughts: 443

Thoughts: 
**Analyzing the Commit for Fuzzing Potential**

Okay, so I've got this commit to evaluate. First, I need to understand exactly what's changed. The diff in the prompt shows that only `tools/mm/slabinfo.c` has been modified, which is a great start. I'll quickly double-check using `git show` or `git status` to be absolutely certain there aren't any sneaky, unlisted changes. Just to be thorough, I might even peek at the commit itself if needed, but the prompt seems pretty clear.

Alright, it *is* just `tools/mm/slabinfo.c`. Now, I recall that this file resides within the `tools/` directory. That immediately sets off some flags. Looking back at the guidelines I've got, Section 2 specifically states: "User-space directories, self-tests, samples, or scripts... that do not affect the compiled kernel image (vmlinux) or kernel modules" are typically not relevant for fuzzing. So, `tools/mm/slabinfo.c` is a user-space utility.

Therefore, my initial assessment is that this is not worth fuzzing. I can confidently set `WorthFuzzing` to `false`.

Next, I need to prepare the `set-results` call with the required fields: `WorthFuzzing`, `FocusSymbols`, `EnableConfigs`, and `Reasoning`.

`WorthFuzzing` is set to `false`, as we've established. `FocusSymbols` and `EnableConfigs` will be empty lists because this change doesn't introduce any new kernel features or require specific configurations.

For the `Reasoning`, I need to articulate this concisely: "The commit modifies only `tools/mm/slabinfo.c`, which is a user-space utility located in the `tools/` directory. This utility is a standalone tool for interacting with `/sys/kernel/slab` or `/sys/slab` and does not affect the compiled kernel image (vmlinux) or kernel modules. Therefore, this change is not relevant for fuzzing by syzkaller."

To be absolutely sure, let's verify again. The diff *is* only `tools/mm/slabinfo.c`. And *no*, it doesn't affect `vmlinux` or kernel modules; it's just a user-space tool. Great, everything checks out. Time to prepare that `set-results` call.

6/2 2026/09/28 11:32 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch exclusively modifies tools/mm/slabinfo.c, which is a userspace tool located in tools/ and does not affect the compiled kernel image (vmlinux) or kernel modules. Per the triage criteria, non-kernel userspace tools are not targets for syzkaller kernel fuzzing.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch exclusively modifies tools/mm/slabinfo.c, which is a userspace tool located in tools/ and does not affect the compiled kernel image (vmlinux) or kernel modules. Per the triage criteria, non-kernel userspace tools are not targets for syzkaller kernel fuzzing.",
  "WorthFuzzing": false
}
7/1 2026/09/28 11:32 action If
0m Args: 
{
  "WorthFuzzing": false
}

Results: 
null
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)