syzbot


KCSAN: data-race in lookup_fast / vfs_unlink
Status: auto-closed as invalid on 2022/05/11 15:47
Reported-by: syzbot+0b7e1411f196a7280f7d@syzkaller.appspotmail.com
First crash: 945d, last: 50d

Sample crash report:
==================================================================
BUG: KCSAN: data-race in lookup_fast / vfs_unlink

write to 0xffff888129d2b840 of 4 bytes by task 2477 on cpu 1:
 dont_mount include/linux/dcache.h:348 [inline]
 vfs_unlink+0x2c6/0x580 fs/namei.c:4152
 do_unlinkat+0x278/0x540 fs/namei.c:4218
 __do_sys_unlink fs/namei.c:4266 [inline]
 __se_sys_unlink fs/namei.c:4264 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4264
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888129d2b840 of 4 bytes by task 1441 on cpu 0:
 d_revalidate fs/namei.c:853 [inline]
 lookup_fast+0x172/0x360 fs/namei.c:1656
 walk_component+0x6d/0x360 fs/namei.c:2016
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x12d/0x3d0 fs/namei.c:2499
 filename_lookup+0x130/0x310 fs/namei.c:2528
 user_path_at_empty+0x3e/0x110 fs/namei.c:2851
 do_readlinkat+0x97/0x210 fs/stat.c:457
 __do_sys_readlink fs/stat.c:490 [inline]
 __se_sys_readlink fs/stat.c:487 [inline]
 __x64_sys_readlink+0x43/0x50 fs/stat.c:487
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00600008 -> 0x00000008

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1441 Comm: udevd Not tainted 5.18.0-rc1-syzkaller-00016-g3e732ebf7316-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (953):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2022/04/06 15:46 upstream 3e732ebf7316 97582466 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/06 09:09 upstream 3e732ebf7316 86b4b7f8 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/05 19:03 upstream ce4c854ee868 0127c10f .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/04 15:44 upstream 312310928417 5915c2cb .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/04 11:04 upstream 09bb8856d4a7 79a2a8fc .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/03 00:05 upstream be2d3ecedd99 79a2a8fc .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/02 08:40 upstream 88e6c0207623 79a2a8fc .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/01 22:03 upstream d0d642a5d365 79a2a8fc .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/04/01 02:36 upstream e8b767f5e040 68fc921a .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/31 13:35 upstream 787af64d05cd c4c32d8c .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/31 10:26 upstream 74164d284b29 9d49f3a7 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/30 15:05 upstream d888c83fcec7 42718dd6 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/29 11:37 upstream 1930a6e739c4 6bdac766 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/29 03:02 upstream ae085d7f9365 6bdac766 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/28 00:44 upstream f82da161ea75 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/27 13:21 upstream f022814633e1 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/27 00:10 upstream bddac7c1e02b 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/26 08:59 upstream 52d543b5497c 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/25 13:39 upstream 34af78c4e616 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/24 18:55 upstream ed4643521e6a 89bc8608 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/24 01:16 upstream 6b1f86f8e9c7 5ff41e94 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/23 03:02 upstream 3bf03b9a0839 5ff41e94 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/22 17:40 upstream b47d5a4f6b8d d88ef0c5 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/21 20:07 upstream eaa54b1458ca e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/21 06:39 upstream f443e374ae13 e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/20 17:45 upstream 14702b3b2438 e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/20 01:46 upstream 97e9c8eb4bb1 e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/19 07:34 upstream 34e047aa16c0 e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/18 01:09 upstream 551acdc3c3d2 e2d91b1d .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/17 04:47 upstream 56e337f2cf13 dfa9a8ed .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/16 23:53 upstream 56e337f2cf13 46cc3b21 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/15 21:20 upstream 56e337f2cf13 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/14 10:05 upstream 09688c0166e7 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/14 01:01 upstream f0e18b03fcaf 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/12 23:28 upstream aad611a868d1 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/12 07:36 upstream 68453767131a 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/11 09:32 upstream 79b00034e9dc 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/11 00:33 upstream 1db333d9a51f 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/10 12:30 upstream 3bf7edc84a9e 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/09 19:30 upstream 330f4c53d3c2 9e8eaa75 .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/08 20:49 upstream 92f90cc9fe0e 7bdd8b2c .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/08 00:42 upstream ea4424be1688 7bdd8b2c .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/07 09:04 upstream ffb217a13a2e 7bdd8b2c .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2022/03/06 14:39 upstream dcde98da9970 7bdd8b2c .config log report info KCSAN: data-race in lookup_fast / vfs_unlink
ci2-upstream-kcsan-gce 2021/01/16 15:11 upstream 1d94330a437a 65a7a854 .config log report info
ci2-upstream-kcsan-gce 2020/03/24 06:15 https://github.com/google/ktsan.git kcsan 40959e34d670 33e14df3 .config log report
ci2-upstream-kcsan-gce 2019/10/24 20:49 https://github.com/google/ktsan.git kcsan 05f2236801fe d01bb02a .config log report