syzbot


KCSAN: data-race in do_readlinkat / vfs_unlink (2)

Status: auto-closed as invalid on 2021/07/07 20:42
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+81be6c24a4710807d848@syzkaller.appspotmail.com
First crash: 1607d, last: 1020d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in do_readlinkat / vfs_unlink fs 1 1622d 1622d 0/26 closed as invalid on 2019/10/18 14:11

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

write to 0xffff88810660b480 of 4 bytes by task 6394 on cpu 1:
 dont_mount include/linux/dcache.h:358 [inline]
 vfs_unlink+0x289/0x400 fs/namei.c:4027
 do_unlinkat+0x238/0x4f0 fs/namei.c:4092
 __do_sys_unlink fs/namei.c:4139 [inline]
 __se_sys_unlink fs/namei.c:4137 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4137
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810660b480 of 4 bytes by task 1032 on cpu 0:
 __d_entry_type include/linux/dcache.h:395 [inline]
 d_is_symlink include/linux/dcache.h:425 [inline]
 do_readlinkat+0xa9/0x200 fs/stat.c:433
 __do_sys_readlink fs/stat.c:458 [inline]
 __se_sys_readlink fs/stat.c:455 [inline]
 __x64_sys_readlink+0x43/0x50 fs/stat.c:455
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00600008 -> 0x00600108

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1032 Comm: systemd-udevd Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (383):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/06/02 20:42 upstream 324c92e5e0ee 0740de69 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/06/02 07:33 upstream 231bc5390667 0740de69 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/06/02 05:40 upstream 231bc5390667 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/31 18:24 upstream c2131f7e73c9 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/31 09:39 upstream 8124c8a6b353 032639db .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/31 00:25 upstream 8124c8a6b353 325a8dab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/30 09:17 upstream b90e90f40b4f 325a8dab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/29 17:18 upstream f956cb99b938 325a8dab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/29 15:48 upstream 6799d4f2da49 325a8dab .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/29 10:01 upstream 6799d4f2da49 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/28 19:58 upstream 5ff2756afde0 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/28 04:00 upstream 97e5bf604b7a 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/27 12:49 upstream d7c5303fbc8a 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/27 00:32 upstream 7ac3a1c1ae51 858ea628 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/26 10:20 upstream ad9f25d33860 750ce164 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/26 06:56 upstream ad9f25d33860 93d3a9f6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/25 17:07 upstream a050a6d2b7e8 93d3a9f6 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/25 02:56 upstream 1434a3127887 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/24 13:15 upstream c4681547bcce 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/23 23:16 upstream 6ebb6814a1ef 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/23 08:04 upstream 4d7620341eda 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/22 19:03 upstream 23d729263037 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/22 03:27 upstream 45af60e7ced0 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/21 14:41 upstream 79a106fc6585 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/21 01:55 upstream ba816d3c265c 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/21 00:12 upstream f01da525b3de 3c7fef33 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/20 19:31 upstream f01da525b3de c560a65d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/20 13:20 upstream c3d0e3fd41b7 c560a65d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/19 19:20 upstream c3d0e3fd41b7 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/17 22:42 upstream 8ac91e6c6033 a343ba6b .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/17 10:14 upstream d07f6ca923ea a2eb125d .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/17 04:15 upstream d07f6ca923ea f54a5c09 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/16 15:50 upstream 63d1cb53e26a f54a5c09 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/16 03:32 upstream c12a29ed9094 f54a5c09 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/15 10:10 upstream 25a1298726e9 93f844de .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/15 07:41 upstream 25a1298726e9 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/14 20:55 upstream bd3c9cdb21a2 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/14 03:20 upstream 315d99318179 8bdd5343 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/13 13:32 upstream c06a2ba62fc4 ecb594cb .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/13 08:23 upstream c06a2ba62fc4 ed7d41c5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/12 20:12 upstream dbb5afad100a ed7d41c5 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/12 07:21 upstream 88b06399c9c7 86294427 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/11 18:41 upstream 88b06399c9c7 b3c3bb8e .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/05/11 01:34 upstream 1140ab592e2e ca873091 .config console log report info ci2-upstream-kcsan-gce KCSAN: data-race in do_readlinkat / vfs_unlink
2021/01/16 18:05 upstream 1d94330a437a 65a7a854 .config console log report info ci2-upstream-kcsan-gce
2020/04/20 07:32 https://github.com/google/ktsan.git kcsan 7c3cd68e5d38 9f7c6d12 .config console log report ci2-upstream-kcsan-gce
2019/10/24 08:43 https://github.com/google/ktsan.git kcsan 05f2236801fe d01bb02a .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.