kernel BUG in lbmIODone (5)

Status: upstream: reported on 2026/07/16 17:25
Reported-by: syzbot+28402e3dbcc95bd93a75@syzkaller.appspotmail.com
First crash: 48d, last: 5d15h
Similar bugs (14)
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 1993d 2112d 0/29 auto-closed as invalid on 2021/07/18 05:20
linux-5.15 kernel BUG in lbmIODone -1 1 1209d 1209d 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 1959d 2172d 0/1 auto-closed as invalid on 2021/08/21 07:16
linux-6.1 kernel BUG in lbmIODone -1 1 1120d 1120d 0/3 auto-obsoleted due to no activity on 2023/11/18 07:18
linux-6.1 kernel BUG in lbmIODone (2) -1 1 889d 889d 0/3 auto-obsoleted due to no activity on 2024/07/06 10:22
linux-5.15 kernel BUG in lbmIODone (2) -1 1 1031d 1031d 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 1290d 1692d 0/1 upstream: reported syz repro on 2022/01/15 01:14
upstream kernel BUG in lbmIODone (2) jfs -1 1 573d 569d 0/29 auto-obsoleted due to no activity on 2025/05/18 00:22
linux-6.1 kernel BUG in lbmIODone (3) -1 3 484d 600d 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 1285d 2122d 0/1 upstream: reported syz repro on 2020/11/11 09:07
linux-5.15 kernel BUG in lbmIODone (3) -1 1 859d 859d 0/3 auto-obsoleted due to no activity on 2024/08/04 15:04
upstream kernel BUG in lbmIODone jfs -1 syz, C error error 135 761d 1722d 0/29 auto-obsoleted due to no activity on 2024/11/10 13:25
linux-6.1 kernel BUG in lbmIODone (4) -1 3 157d 230d 0/3 auto-obsoleted due to no activity on 2026/07/08 10:40
upstream kernel BUG in lbmIODone (3) jfs -1 4 298d 356d 0/29 auto-obsoleted due to no activity on 2026/02/17 01:16

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 07/24/2026
RIP: 0010:lbmIODone+0x1634/0x1690 fs/jfs/jfs_logmgr.c:2298
Code: 52 19 32 07 0f 0b e8 eb 84 8e fe 48 c7 c7 20 24 c6 8a 48 c7 c6 20 1f c6 8a ba fa 08 00 00 48 c7 c1 a0 2d c6 8a e8 2c 19 32 07 <0f> 0b e8 c5 84 8e fe 48 c7 c7 20 24 c6 8a 48 c7 c6 20 1f c6 8a ba
RSP: 0000:ffffc900001b7ae8 EFLAGS: 00010046
RAX: 000000000000003f RBX: 0000000000000020 RCX: d7915507d0791800
RDX: 0000000000000100 RSI: 0000000080000101 RDI: 0000000000000000
RBP: ffff888147bb4808 R08: ffffc900001b77e7 R09: 1ffff92000036efc
R10: dffffc0000000000 R11: fffff52000036efd R12: ffff888147bb4800
R13: dffffc0000000000 R14: 0000000000000a06 R15: ffff888053cb9278
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2bd0a4e000 CR3: 000000002ffeb000 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+0x535/0xdf0 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+0x291/0x910 kernel/softirq.c:596
 run_ksoftirqd+0xa4/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x667/0xa30 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+0x1634/0x1690 fs/jfs/jfs_logmgr.c:2298
Code: 52 19 32 07 0f 0b e8 eb 84 8e fe 48 c7 c7 20 24 c6 8a 48 c7 c6 20 1f c6 8a ba fa 08 00 00 48 c7 c1 a0 2d c6 8a e8 2c 19 32 07 <0f> 0b e8 c5 84 8e fe 48 c7 c7 20 24 c6 8a 48 c7 c6 20 1f c6 8a ba
RSP: 0000:ffffc900001b7ae8 EFLAGS: 00010046
RAX: 000000000000003f RBX: 0000000000000020 RCX: d7915507d0791800
RDX: 0000000000000100 RSI: 0000000080000101 RDI: 0000000000000000
RBP: ffff888147bb4808 R08: ffffc900001b77e7 R09: 1ffff92000036efc
R10: dffffc0000000000 R11: fffff52000036efd R12: ffff888147bb4800
R13: dffffc0000000000 R14: 0000000000000a06 R15: ffff888053cb9278
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2bd0a4e000 CR3: 000000002ffeb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/28 23:10 linux-6.1.y d64a499eea6b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan kernel BUG in lbmIODone
2026/07/16 17:24 linux-6.1.y 090666d3cc90 71b49442 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in lbmIODone
* Struck through repros no longer work on HEAD.