syzbot

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: 277 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:ffffc9000263fc90 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: d5a639dbc29da500
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888024c45c98 R08: dffffc0000000000 R09: ffffed10172067b0
R10: ffffed10172067b0 R11: 1ffff110172067af R12: ffffc90002661340
R13: 0000000000000000 R14: ffff888024c45d48 R15: ffff888024c45ca8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb17ccb58 CR3: 000000005d0d2000 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]
 diUpdatePMap+0x629/0xe50 fs/jfs/jfs_imap.c:2831
 txUpdateMap+0x6c2/0x890 fs/jfs/jfs_txnmgr.c:2391
 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 259941d18f5cbdc6 ]---
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:ffffc9000263fc90 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: d5a639dbc29da500
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888024c45c98 R08: dffffc0000000000 R09: ffffed10172067b0
R10: ffffed10172067b0 R11: 1ffff110172067af R12: ffffc90002661340
R13: 0000000000000000 R14: ffff888024c45d48 R15: ffff888024c45ca8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb17ccb58 CR3: 000000005d0d2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400