syzbot


WARNING in drop_nlink

Status: upstream: reported C repro on 2023/06/08 18:04
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+dfeb6a89bfe7b591c73a@syzkaller.appspotmail.com
First crash: 495d, last: 7h08m
Bug presence (1)
Date Name Commit Repro Result
2023/06/08 upstream (ToT) 25041a4c02c7 C [report] WARNING in drop_nlink
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in drop_nlink (2) hfs udf C done inconclusive 3450 3h06m 1463d 0/28 upstream: reported C repro on 2020/10/13 17:02
linux-6.1 WARNING in drop_nlink origin:upstream C 177 8d01h 491d 0/3 upstream: reported C repro on 2023/06/12 09:27
linux-4.14 WARNING in drop_nlink C 9 589d 930d 0/1 upstream: reported C repro on 2022/03/30 09:01
linux-4.19 WARNING in drop_nlink fat reiserfs C error 25 618d 1468d 0/1 upstream: reported C repro on 2020/10/08 09:54
upstream WARNING in drop_nlink fs C done error 1 1637d 1633d 15/28 fixed on 2020/09/16 22:51
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2024/03/17 15:39 1h04m bisect fix linux-5.15.y OK (0) job log log
2024/02/14 16:18 2h24m bisect fix linux-5.15.y OK (0) job log log
2024/01/06 06:47 52m bisect fix linux-5.15.y OK (0) job log log
2023/12/07 05:27 1h13m bisect fix linux-5.15.y OK (0) job log log
2023/11/06 23:20 1h50m bisect fix linux-5.15.y OK (0) job log log
2023/10/04 23:52 1h39m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
minix_free_block (loop0:20): bit already cleared
minix_free_block (loop0:21): bit already cleared
minix_free_block (loop0:19): bit already cleared
minix_free_block (loop0:22): bit already cleared
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3563 at fs/inode.c:307 drop_nlink+0xbb/0x100
Modules linked in:
CPU: 1 PID: 3563 Comm: syz-executor262 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:drop_nlink+0xbb/0x100 fs/inode.c:307
Code: 49 8b 1e 48 8d bb c8 07 00 00 be 08 00 00 00 e8 3b a4 ed ff f0 48 ff 83 c8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 65 d8 a3 ff <0f> 0b eb 89 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c
RSP: 0018:ffffc90002267c50 EFLAGS: 00010293
RAX: ffffffff81dc820b RBX: 1ffff1100ec6c965 RCX: ffff888077e39dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81dc818f R09: ffffed100ec6c96d
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888076364b28
R13: ffff8880740a3608 R14: ffff888076364ae0 R15: dffffc0000000000
FS:  0000555559a72380(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561d9ad54ae8 CR3: 000000007a28c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_dec_link_count include/linux/fs.h:2503 [inline]
 minix_unlink+0x14a/0x1a0 fs/minix/namei.c:167
 vfs_unlink+0x359/0x5f0 fs/namei.c:4280
 do_unlinkat+0x4a3/0x950 fs/namei.c:4348
 __do_sys_unlink fs/namei.c:4396 [inline]
 __se_sys_unlink fs/namei.c:4394 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4394
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f05c29efb97
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd46001d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05c29efb97
RDX: 00007ffd46001d50 RSI: 00007ffd46001de0 RDI: 00007ffd46001de0
RBP: 00007ffd46001de0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd46002ed0
R13: 0000555559a7b700 R14: 0000000000000001 R15: 431bde82d7b634db
 </TASK>

Crashes (194):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/16 00:35 linux-5.15.y 3a5928702e71 08d8a733 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in drop_nlink
2023/06/08 18:04 linux-5.15.y d7af3e5ba454 058b3a5a .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/03/31 10:56 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2023/08/07 04:57 linux-5.15.y 38d4ca22a528 4ffcc9ef .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/15 15:10 linux-5.15.y 3a5928702e71 7eb57b4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/15 02:28 linux-5.15.y 3a5928702e71 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/14 13:35 linux-5.15.y 3a5928702e71 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/12 03:03 linux-5.15.y 3a5928702e71 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/11 10:41 linux-5.15.y 3a5928702e71 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/11 10:41 linux-5.15.y 3a5928702e71 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/10 20:57 linux-5.15.y 3a5928702e71 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/10 07:51 linux-5.15.y 3a5928702e71 0278d004 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/09 23:08 linux-5.15.y 3a5928702e71 56fb2cb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/09 22:03 linux-5.15.y 3a5928702e71 56fb2cb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/08 13:55 linux-5.15.y 3a5928702e71 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/08 13:13 linux-5.15.y 3a5928702e71 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/08 09:59 linux-5.15.y 3a5928702e71 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/08 03:25 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/06 23:55 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/06 22:39 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/06 09:47 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/05 00:57 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/04 22:31 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/03 20:21 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/03 07:57 linux-5.15.y 3a5928702e71 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/03 07:57 linux-5.15.y 3a5928702e71 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/02 16:43 linux-5.15.y 3a5928702e71 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/01 16:51 linux-5.15.y 3a5928702e71 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/30 17:51 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/28 14:54 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/28 14:52 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/28 05:41 linux-5.15.y 3a5928702e71 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/26 06:46 linux-5.15.y 3a5928702e71 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/24 09:20 linux-5.15.y 3a5928702e71 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/15 07:21 linux-5.15.y 3a5928702e71 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/09/07 18:09 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/08/26 04:35 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/08/24 14:03 linux-5.15.y fa93fa65db6e d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/08/15 00:26 linux-5.15.y 7e89efd3ae1c e6b88e20 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drop_nlink
2024/10/08 21:05 linux-5.15.y 3a5928702e71 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/10/07 08:52 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/30 01:43 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/29 14:16 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/27 10:57 linux-5.15.y 3a5928702e71 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/22 20:53 linux-5.15.y 3a5928702e71 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/15 13:29 linux-5.15.y 3a5928702e71 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/09 09:43 linux-5.15.y 14e468424d3e 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/09/02 19:43 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/08/31 20:05 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/08/20 04:26 linux-5.15.y fa93fa65db6e 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
2024/08/19 18:29 linux-5.15.y fa93fa65db6e 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in drop_nlink
* Struck through repros no longer work on HEAD.