syzbot
kernel BUG in jfs_flush_journal (2)
Status:
auto-obsoleted due to no activity on 2026/01/29 01:09
Subsystems:
jfs
[Documentation on labels]
Reported-by: syzbot+e66452054e1f161e8d29@syzkaller.appspotmail.com
First crash: 784d, last: 277d
Sample crash report:
BUG at fs/jfs/jfs_logmgr.c:1587 assert(list_empty(&log->cqueue))
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_logmgr.c:1587!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7482 Comm: syz.5.223 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:jfs_flush_journal+0xeb2/0xed0 fs/jfs/jfs_logmgr.c:1587
Code: e9 07 f6 ff ff e8 5e 9a 81 fe 48 c7 c7 a0 36 24 8b 48 c7 c6 a0 31 24 8b ba 33 06 00 00 48 c7 c1 e0 36 24 8b e8 bf ca e9 fd 90 <0f> 0b f3 0f 1e fa e8 33 9a 81 fe bf 02 00 00 00 e8 d9 91 52 fe e9
RSP: 0018:ffffc90003cf7b20 EFLAGS: 00010246
RAX: 0000000000000040 RBX: dffffc0000000000 RCX: 0610df2e4e19a900
RDX: ffffc9001da01000 RSI: 0000000000005215 RDI: 0000000000005216
RBP: ffffc90003cf7c58 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200079ef09 R12: 00000000000000c7
R13: ffff888063900a18 R14: ffff888063900800 R15: ffff888063900ad8
FS: 00007f7911a6e6c0(0000) GS:ffff888126bc2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563c8b2a6000 CR3: 00000000289b0000 CR4: 00000000003526f0
Call Trace:
<TASK>
jfs_umount_rw+0x75/0x130 fs/jfs/jfs_umount.c:134
jfs_reconfigure+0x6f6/0xa00 fs/jfs/super.c:421
reconfigure_super+0x227/0x890 fs/super.c:1076
do_remount fs/namespace.c:3279 [inline]
path_mount+0xd1a/0xfe0 fs/namespace.c:4029
do_mount fs/namespace.c:4050 [inline]
__do_sys_mount fs/namespace.c:4238 [inline]
__se_sys_mount+0x313/0x410 fs/namespace.c:4215
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f791380efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7911a6e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7913a65fa0 RCX: 00007f791380efc9
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007f7913891f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000021 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7913a66038 R14: 00007f7913a65fa0 R15: 00007ffdcc294b88
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:jfs_flush_journal+0xeb2/0xed0 fs/jfs/jfs_logmgr.c:1587
Code: e9 07 f6 ff ff e8 5e 9a 81 fe 48 c7 c7 a0 36 24 8b 48 c7 c6 a0 31 24 8b ba 33 06 00 00 48 c7 c1 e0 36 24 8b e8 bf ca e9 fd 90 <0f> 0b f3 0f 1e fa e8 33 9a 81 fe bf 02 00 00 00 e8 d9 91 52 fe e9
RSP: 0018:ffffc90003cf7b20 EFLAGS: 00010246
RAX: 0000000000000040 RBX: dffffc0000000000 RCX: 0610df2e4e19a900
RDX: ffffc9001da01000 RSI: 0000000000005215 RDI: 0000000000005216
RBP: ffffc90003cf7c58 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff5200079ef09 R12: 00000000000000c7
R13: ffff888063900a18 R14: ffff888063900800 R15: ffff888063900ad8
FS: 00007f7911a6e6c0(0000) GS:ffff888126bc2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563c8b2a6000 CR3: 00000000289b0000 CR4: 00000000003526f0
* Struck through repros no longer work on HEAD.