BUG at fs/jfs/jfs_logmgr.c:1919 assert(bp->l_wqnext == NULL)
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kernel BUG at fs/jfs/jfs_logmgr.c:1919!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5580 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:lbmfree fs/jfs/jfs_logmgr.c:1919 [inline]
RIP: 0010:lbmIOWait+0x5ab/0x5b0 fs/jfs/jfs_logmgr.c:2154
Code: e9 c7 fc ff ff e8 75 68 5d fe 48 c7 c7 80 8f ad 8b 48 c7 c6 80 8a ad 8b ba 7f 07 00 00 48 c7 c1 00 98 ad 8b e8 d6 f4 bd fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc900050879e0 EFLAGS: 00010246
RAX: 000000000000003c RBX: ffff88805e4d7808 RCX: 1a3730d466ab6f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005087af0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a10eed R12: 000000000000002e
R13: ffff88805e4d7810 R14: dffffc0000000000 R15: 1ffff92000a10f44
FS:  00005555781c8500(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f92abdee000 CR3: 000000002b7de000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lmLogShutdown+0x1ff/0x850 fs/jfs/jfs_logmgr.c:1657
 lmLogClose+0x28c/0x530 fs/jfs/jfs_logmgr.c:1457
 jfs_umount+0x2da/0x3b0 fs/jfs/jfs_umount.c:124
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:751
 kill_block_super+0x44/0xa0 fs/super.c:1903
 deactivate_locked_super+0xbe/0x110 fs/super.c:586
 cleanup_mnt+0x204/0x2a0 fs/namespace.c:1396
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97f68df797
Code: a2 c7 05 5c 7f 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc2fa4bfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f97f6974f1b RCX: 00007f97f68df797
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc2fa4c060
RBP: 00007ffc2fa4c060 R08: 00007ffc2fa4d060 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc2fa4d0f0
R13: 00007f97f6974f1b R14: 000000000001d98a R15: 00007ffc2fa4d130
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lbmfree fs/jfs/jfs_logmgr.c:1919 [inline]
RIP: 0010:lbmIOWait+0x5ab/0x5b0 fs/jfs/jfs_logmgr.c:2154
Code: e9 c7 fc ff ff e8 75 68 5d fe 48 c7 c7 80 8f ad 8b 48 c7 c6 80 8a ad 8b ba 7f 07 00 00 48 c7 c1 00 98 ad 8b e8 d6 f4 bd fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55
RSP: 0018:ffffc900050879e0 EFLAGS: 00010246
RAX: 000000000000003c RBX: ffff88805e4d7808 RCX: 1a3730d466ab6f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90005087af0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a10eed R12: 000000000000002e
R13: ffff88805e4d7810 R14: dffffc0000000000 R15: 1ffff92000a10f44
FS:  00005555781c8500(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f92ac1ac000 CR3: 000000002b7de000 CR4: 00000000003526f0