list_add corruption. next is NULL.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 123 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__list_add_valid_or_report+0xc3/0x130 lib/list_debug.c:27
Code: 4c 89 f2 48 89 d9 e8 8c 2f 9f fc 90 0f 0b 48 c7 c7 a0 4e 3f 8b e8 7d 2f 9f fc 90 0f 0b 48 c7 c7 60 4f 3f 8b e8 6e 2f 9f fc 90 <0f> 0b 48 89 df e8 83 7f 7a fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900039b7a00 EFLAGS: 00010246
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 2e34aaff4898ea00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000080000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000736ee5 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92000641298
FS:  0000000000000000(0000) GS:ffff888126d06000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34983c9000 CR3: 0000000033580000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add include/linux/list.h:177 [inline]
 dbUpdatePMap+0x7e4/0xeb0 fs/jfs/jfs_dmap.c:577
 txAllocPMap+0x57d/0x6b0 fs/jfs/jfs_txnmgr.c:2426
 txUpdateMap+0x2a2/0x9c0 fs/jfs/jfs_txnmgr.c:2309
 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
 jfs_lazycommit+0x3f1/0xa10 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xc3/0x130 lib/list_debug.c:27
Code: 4c 89 f2 48 89 d9 e8 8c 2f 9f fc 90 0f 0b 48 c7 c7 a0 4e 3f 8b e8 7d 2f 9f fc 90 0f 0b 48 c7 c7 60 4f 3f 8b e8 6e 2f 9f fc 90 <0f> 0b 48 89 df e8 83 7f 7a fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900039b7a00 EFLAGS: 00010246
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 2e34aaff4898ea00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000080000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000736ee5 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92000641298
FS:  0000000000000000(0000) GS:ffff888126d06000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34983c9000 CR3: 0000000033580000 CR4: 00000000003526f0