ci2 starts bisection 2023-12-01 16:17:57.065783492 +0000 UTC m=+142187.712360773 bisecting fixing commit since 471e639e59d128f4bf58000a118b2ceca3893f98 building syzkaller on f3921d4d63f97d1f1fb49a69ea85744bb7ef184b ensuring issue is reproducible on original commit 471e639e59d128f4bf58000a118b2ceca3893f98 testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: a06f2610ed76764b012f3f84248cbb08e5df1cca98677d4c318fb1268828fb63 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #12: crashed: KASAN: use-after-free Read in ext4_search_dir run #13: crashed: KASAN: use-after-free Read in ext4_search_dir run #14: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #15: crashed: KASAN: use-after-free Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #18: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #19: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3db6c9678d0d85ef98f512d89c9a012f8ab3153c2add8b12a7c3114e0d2731e6 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed kconfig minimization: base=3703 full=7270 leaves diff=1987 split chunks (needed=false): <1987> split chunk #0 of len 1987 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 600fbc8f775bb98fe40b7a5511d3e0663ae359aa825ccae8f6d7e19c3039a24e run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 546233185e87af0cff7cd93040e40c257909c8d86ad99791183cfbf145ce15a6 run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: acbc9b05687f2e556780e59ff1eaeab175823d740d6843e40aa71a20b3b9b8c3 run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: d9530cd202157e012048ff172931cfceac8bc01de51ab93535e5eece16586e8a run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit 471e639e59d128f4bf58000a118b2ceca3893f98 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1c780d6b7e30ea5572fdaaf2b33ab4fa5fbe7c96dcffb818bc732de1c31aa6d5 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #5: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped disabling configs for [LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP HANG], they are not needed testing current HEAD a78d278e01b1b608f90077258debc7a98de51482 testing commit a78d278e01b1b608f90077258debc7a98de51482 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 011e495977b7711a7b91fdad76fd2d827ab7b4b47afc4357d3e11a3c07549ac4 run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #4: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 55m59.897813357s (build: 26m28.485911309s, test: 27m31.246456292s) crash still not fixed or there were kernel test errors commit msg: Linux 5.15.140 crash: KASAN: slab-out-of-bounds Read in ext4_search_dir EXT4-fs (loop0): mounted filesystem without journal. Opts: jqfmt=vfsold,resgid=0x000000000000ee00,bh,noload,data_err=ignore,usrjquota=,,errors=continue. Quota mode: none. ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_search_dir+0x1df/0x260 fs/ext4/namei.c:1543 Read of size 1 at addr ffff8881023e43ed by task syz-executor.0/1506 CPU: 1 PID: 1506 Comm: syz-executor.0 Not tainted 5.15.140-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:451 ext4_search_dir+0x1df/0x260 fs/ext4/namei.c:1543 ext4_find_inline_entry+0x355/0x440 fs/ext4/inline.c:1700 __ext4_find_entry+0x84a/0xce0 fs/ext4/namei.c:1616 ext4_lookup_entry fs/ext4/namei.c:1771 [inline] ext4_lookup fs/ext4/namei.c:1839 [inline] ext4_lookup+0x156/0x570 fs/ext4/namei.c:1830 lookup_open.isra.0+0x808/0x1680 fs/namei.c:3370 open_last_lookups fs/namei.c:3462 [inline] path_openat+0x800/0x24d0 fs/namei.c:3669 do_filp_open+0x199/0x3d0 fs/namei.c:3699 do_sys_openat2+0x11e/0x400 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_open fs/open.c:1235 [inline] __se_sys_open fs/open.c:1231 [inline] __x64_sys_open+0xfd/0x1a0 fs/open.c:1231 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7feab27eab29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feab236d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007feab2909f80 RCX: 00007feab27eab29 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100 RBP: 00007feab283647a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007feab2909f80 R15: 00007ffdf7b333c8 Allocated by task 0: (stack is not available) The buggy address belongs to the object at ffff8881023e3300 which belongs to the cache sgpool-128 of size 4096 The buggy address is located 237 bytes to the right of 4096-byte region [ffff8881023e3300, ffff8881023e4300) The buggy address belongs to the page: page:ffffea000408f800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1023e0 head:ffffea000408f800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x200000000010200(slab|head|node=0|zone=2) raw: 0200000000010200 0000000000000000 dead000000000122 ffff8881023bc140 raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 2299709791, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x166f/0x2910 mm/page_alloc.c:4159 __alloc_pages+0x2b3/0x590 mm/page_alloc.c:5421 alloc_page_interleave+0xf/0x160 mm/mempolicy.c:2031 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab+0x2eb/0x430 mm/slub.c:1912 new_slab mm/slub.c:1975 [inline] ___slab_alloc+0xb1c/0xf80 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x2d7/0x310 mm/slub.c:3233 mempool_init_node+0x296/0x5b0 mm/mempool.c:202 mempool_create_node mm/mempool.c:271 [inline] mempool_create+0x6c/0xa0 mm/mempool.c:256 mempool_create_slab_pool include/linux/mempool.h:69 [inline] sg_pool_init+0xe5/0x1a5 lib/sg_pool.c:158 do_one_initcall+0xb4/0x2e0 init/main.c:1295 do_initcall_level init/main.c:1368 [inline] do_initcalls init/main.c:1384 [inline] do_basic_setup init/main.c:1403 [inline] kernel_init_freeable+0x519/0x57b init/main.c:1608 kernel_init+0x14/0x120 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 page_owner free stack trace missing Memory state around the buggy address: ffff8881023e4280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881023e4300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881023e4380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881023e4400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881023e4480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================