syzbot


WARNING in jfs_rename

Status: upstream: reported C repro on 2025/05/05 05:04
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+39e82bbdc8c5c382597b@syzkaller.appspotmail.com
First crash: 51d, last: 6d09h
Bug presence (1)
Date Name Commit Repro Result
2025/05/14 upstream (ToT) c94d59a126cb C [report] WARNING in jfs_rename
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in jfs_rename jfs C inconclusive 11 8d12h 47d 0/29 upstream: reported C repro on 2025/05/09 04:43
linux-6.1 WARNING in jfs_rename origin:upstream C 4 20d 51d 0/3 upstream: reported C repro on 2025/05/05 04:58
Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/05/19 11:48 9m retest repro linux-5.15.y report log
2025/05/19 11:48 10m retest repro linux-5.15.y report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/06/19 06:06 1h52m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4162 at fs/inode.c:332 drop_nlink+0xbb/0x100 fs/inode.c:332
Modules linked in:
CPU: 0 PID: 4162 Comm: syz-executor319 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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 9b 12 ef ff f0 48 ff 83 c8 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 e8 95 9d a9 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:ffffc900010df8d0 EFLAGS: 00010293
RAX: ffffffff81ce207b RBX: ffff8880716a2930 RCX: ffff8880185cd940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff94000380657
R10: fffff94000380657 R11: 1ffffd4000380656 R12: 1ffff1100e2d452f
R13: 1ffff9200021bf2c R14: ffff8880716a2978 R15: dffffc0000000000
FS:  00005555696ff380(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcdc8cd910 CR3: 00000000700ae000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_rename+0xbf8/0x16a0 fs/jfs/namei.c:1246
 vfs_rename+0xbbf/0x10d0 fs/namei.c:4832
 do_renameat2+0xa83/0xf70 fs/namei.c:4985
 __do_sys_rename fs/namei.c:5031 [inline]
 __se_sys_rename fs/namei.c:5029 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5029
 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: 0033:0x7fb02f457639
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc62c42c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007ffc62c42e38 RCX: 00007fb02f457639
RDX: 0000000000000000 RSI: 0000200000000780 RDI: 00002000000003c0
RBP: 00007fb02f4d0610 R08: 0000000000006221 R09: 0000000000000000
R10: 00007ffc62c42b20 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc62c42e28 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/05 05:42 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in jfs_rename
2025/05/05 05:24 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan WARNING in jfs_rename
2025/05/05 05:04 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in jfs_rename
2025/05/05 05:03 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in jfs_rename
* Struck through repros no longer work on HEAD.