syzbot


WARNING in ocfs2_unlink

Status: upstream: reported C repro on 2025/01/10 17:34
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ca2b3d3c4338a476f16d@syzkaller.appspotmail.com
First crash: 281d, last: 4h14m
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2025/09/17 upstream (ToT) 5aca7966d2a7 C [report] WARNING in ocfs2_unlink
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ocfs2_unlink ocfs2 -1 C inconclusive 85 3h31m 277d 0/29 upstream: reported C repro on 2025/01/14 14:59
linux-6.1 WARNING in ocfs2_unlink origin:upstream -1 C 7 33d 102d 0/3 upstream: reported C repro on 2025/07/08 05:30
Last patch testing requests (9)
Created Duration User Patch Repo Result
2025/10/18 16:14 16m retest repro linux-5.15.y report log
2025/10/18 16:14 17m retest repro linux-5.15.y report log
2025/10/03 06:37 18m retest repro linux-5.15.y report log
2025/08/31 06:03 13m retest repro linux-5.15.y report log
2025/08/31 06:03 16m retest repro linux-5.15.y report log
2025/08/05 01:18 15m retest repro linux-5.15.y report log
2025/08/05 01:18 15m retest repro linux-5.15.y report log
2025/06/17 12:44 13m retest repro linux-5.15.y report log
2025/06/17 12:44 11m retest repro linux-5.15.y report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4361 at fs/inode.c:332 drop_nlink+0xbb/0x100 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 4361 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:drop_nlink+0xbb/0x100 fs/inode.c:332
Code: 48 8b 1b 48 8d bb c8 07 00 00 be 08 00 00 00 e8 0b 12 ef ff f0 48 ff 83 c8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 45 a8 aa ff <0f> 0b eb 88 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 62 ff ff ff 4c
RSP: 0018:ffffc90002f6f9b0 EFLAGS: 00010293
RAX: ffffffff81cd22db RBX: ffff88805dd60878 RCX: ffff888020c6d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100bbac120
R10: ffffed100bbac120 R11: 1ffff1100bbac11e R12: 1ffff1100bbac118
R13: 1ffff920005edf4c R14: ffff88805dd608c0 R15: dffffc0000000000
FS:  000055555619b500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a96b829950 CR3: 000000001e455000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_unlink+0xf2c/0x17f0 fs/ocfs2/namei.c:1002
 vfs_rmdir+0x1b2/0x430 fs/namei.c:4149
 do_rmdir+0x295/0x710 fs/namei.c:4210
 __do_sys_unlinkat fs/namei.c:4390 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __x64_sys_unlinkat+0xc0/0xe0 fs/namei.c:4384
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7efcefd3e187
Code: 73 01 c3 48 c7 c1 a8 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 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd0d2564a8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007efcefd3e187
RDX: 0000000000000200 RSI: 00007ffd0d257650 RDI: 00000000ffffff9c
RBP: 00007efcefdc1c05 R08: 00005555561be66b R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000207 R12: 00007ffd0d257650
R13: 00007efcefdc1c05 R14: 0000000000011008 R15: 00007ffd0d259810
 </TASK>

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/14 23:32 linux-5.15.y 43bb85222e53 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/12 05:55 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 05:39 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 04:39 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 03:25 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/09/16 15:53 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/09/14 22:04 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/29 18:02 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/29 18:01 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/29 18:01 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/28 14:56 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ocfs2_unlink
2025/05/12 04:53 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/11 08:40 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
2025/01/10 17:34 linux-5.15.y 4735586da88e 67d7ec0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ocfs2_unlink
* Struck through repros no longer work on HEAD.