syzbot


kernel BUG in lbmIODone (4)

Status: upstream: reported on 2026/01/16 03:12
Reported-by: syzbot+3fcd00ba75eb8f87da22@syzkaller.appspotmail.com
First crash: 11h56m, last: 11h56m
Similar bugs (13)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at fs/jfs/jfs_logmgr.c:LINE! jfs -1 5 1763d 1882d 0/29 auto-closed as invalid on 2021/07/18 05:20
linux-5.15 kernel BUG in lbmIODone -1 1 979d 979d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:03
linux-4.14 kernel BUG at fs/jfs/jfs_logmgr.c:LINE! -1 17 1729d 1942d 0/1 auto-closed as invalid on 2021/08/21 07:16
linux-6.1 kernel BUG in lbmIODone -1 1 890d 890d 0/3 auto-obsoleted due to no activity on 2023/11/18 07:18
linux-6.1 kernel BUG in lbmIODone (2) -1 1 659d 659d 0/3 auto-obsoleted due to no activity on 2024/07/06 10:22
linux-5.15 kernel BUG in lbmIODone (2) -1 1 801d 801d 0/3 auto-obsoleted due to no activity on 2024/02/15 02:05
linux-4.14 kernel BUG in lbmIODone jfs -1 syz 13 1060d 1462d 0/1 upstream: reported syz repro on 2022/01/15 01:14
upstream kernel BUG in lbmIODone (2) jfs -1 1 343d 339d 0/29 auto-obsoleted due to no activity on 2025/05/18 00:22
linux-6.1 kernel BUG in lbmIODone (3) -1 3 254d 370d 0/3 auto-obsoleted due to no activity on 2025/08/14 20:20
linux-4.19 kernel BUG at fs/jfs/jfs_logmgr.c:LINE! jfs -1 syz 130 1055d 1892d 0/1 upstream: reported syz repro on 2020/11/11 09:07
linux-5.15 kernel BUG in lbmIODone (3) -1 1 630d 630d 0/3 auto-obsoleted due to no activity on 2024/08/04 15:04
upstream kernel BUG in lbmIODone jfs -1 C error error 135 531d 1492d 0/29 auto-obsoleted due to no activity on 2024/11/10 13:25
upstream kernel BUG in lbmIODone (3) jfs -1 4 68d 126d 0/29 upstream: reported on 2025/09/11 20:39

Sample crash report:
BUG at fs/jfs/jfs_logmgr.c:2298 assert(bp->l_flag & lbmRELEASE)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_logmgr.c:2298!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:lbmIODone+0x1622/0x1670 fs/jfs/jfs_logmgr.c:2298
Code: 54 02 18 07 0f 0b e8 fd e5 92 fe 48 c7 c7 a0 2d a6 8a 48 c7 c6 a0 28 a6 8a ba fa 08 00 00 48 c7 c1 20 37 a6 8a e8 2e 02 18 07 <0f> 0b e8 d7 e5 92 fe 48 c7 c7 a0 2d a6 8a 48 c7 c6 a0 28 a6 8a ba
RSP: 0018:ffffc900001b7ab8 EFLAGS: 00010046
RAX: 000000000000003f RBX: 0000000000000020 RCX: 4a2a1e17350d0500
RDX: 0000000000000100 RSI: 0000000080000101 RDI: 0000000000000000
RBP: ffff888019654c08 R08: dffffc0000000000 R09: fffff52000036ef9
R10: fffff52000036ef9 R11: 1ffff92000036ef8 R12: ffff888019654c00
R13: dffffc0000000000 R14: 0000000000000a06 R15: ffff8880552a4a78
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4593372a60 CR3: 000000005ce00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 req_bio_endio block/blk-mq.c:782 [inline]
 blk_update_request+0x593/0xe30 block/blk-mq.c:927
 blk_mq_end_request+0x3a/0x70 block/blk-mq.c:1052
 blk_complete_reqs block/blk-mq.c:1132 [inline]
 blk_done_softirq+0x100/0x150 block/blk-mq.c:1137
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:968
 smpboot_thread_fn+0x64a/0xa40 kernel/smpboot.c:164
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lbmIODone+0x1622/0x1670 fs/jfs/jfs_logmgr.c:2298
Code: 54 02 18 07 0f 0b e8 fd e5 92 fe 48 c7 c7 a0 2d a6 8a 48 c7 c6 a0 28 a6 8a ba fa 08 00 00 48 c7 c1 20 37 a6 8a e8 2e 02 18 07 <0f> 0b e8 d7 e5 92 fe 48 c7 c7 a0 2d a6 8a 48 c7 c6 a0 28 a6 8a ba
RSP: 0018:ffffc900001b7ab8 EFLAGS: 00010046
RAX: 000000000000003f RBX: 0000000000000020 RCX: 4a2a1e17350d0500
RDX: 0000000000000100 RSI: 0000000080000101 RDI: 0000000000000000
RBP: ffff888019654c08 R08: dffffc0000000000 R09: fffff52000036ef9
R10: fffff52000036ef9 R11: 1ffff92000036ef8 R12: ffff888019654c00
R13: dffffc0000000000 R14: 0000000000000a06 R15: ffff8880552a4a78
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4593372a60 CR3: 000000005ce00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/16 03:10 linux-6.1.y bec0e10ee67e d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in lbmIODone
* Struck through repros no longer work on HEAD.