list_add corruption. next is NULL.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:26!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 278 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__list_add_valid+0xb6/0xe0 lib/list_debug.c:25
Code: 4c 89 fe 4c 89 f2 48 89 d9 e8 a6 5e b8 05 0f 0b 48 c7 c7 c0 e8 59 8a e8 98 5e b8 05 0f 0b 48 c7 c7 60 e9 59 8a e8 8a 5e b8 05 <0f> 0b 48 c7 c7 c0 e9 59 8a 4c 89 f6 48 89 d9 e8 76 5e b8 05 0f 0b
RSP: 0018:ffffc90002d8fbd0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 357e2c0efae8e700
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888077d8221c R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805cf76010 R15: 1ffff920004dc246
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fcc7f4000 CR3: 000000002a9d2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add include/linux/list.h:67 [inline]
 list_add include/linux/list.h:86 [inline]
 dbUpdatePMap+0x6da/0xdb0 fs/jfs/jfs_dmap.c:577
 txAllocPMap+0x57d/0x6b0 fs/jfs/jfs_txnmgr.c:2460
 txUpdateMap+0x706/0x890 fs/jfs/jfs_txnmgr.c:2398
 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline]
 jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace c9725d50f2c33f50 ]---
RIP: 0010:__list_add_valid+0xb6/0xe0 lib/list_debug.c:25
Code: 4c 89 fe 4c 89 f2 48 89 d9 e8 a6 5e b8 05 0f 0b 48 c7 c7 c0 e8 59 8a e8 98 5e b8 05 0f 0b 48 c7 c7 60 e9 59 8a e8 8a 5e b8 05 <0f> 0b 48 c7 c7 c0 e9 59 8a 4c 89 f6 48 89 d9 e8 76 5e b8 05 0f 0b
RSP: 0018:ffffc90002d8fbd0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 357e2c0efae8e700
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888077d8221c R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805cf76010 R15: 1ffff920004dc246
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fcc7f4000 CR3: 000000002a9d2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400