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: 113 Comm: jfsCommit Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 ec 4e 8f fc 90 0f 0b 48 c7 c7 20 7c c0 8b e8 dd 4e 8f fc 90 0f 0b 48 c7 c7 e0 7c c0 8b e8 ce 4e 8f fc 90 <0f> 0b 48 89 df e8 13 ca 6d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc90002717ae8 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: e5acff1a642f8e00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88807f3aa0f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bbae20 R12: ffffc90002739230
R13: 0000000000000000 R14: ffff88807f3aa1a8 R15: ffff88807f3aa108
FS:  0000000000000000(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70eefb6ad8 CR3: 00000000348dc000 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]
 diUpdatePMap+0x636/0xe60 fs/jfs/jfs_imap.c:2831
 txUpdateMap+0x7da/0x9c0 fs/jfs/jfs_txnmgr.c:2357
 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
 jfs_lazycommit+0x43f/0xa90 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 ec 4e 8f fc 90 0f 0b 48 c7 c7 20 7c c0 8b e8 dd 4e 8f fc 90 0f 0b 48 c7 c7 e0 7c c0 8b e8 ce 4e 8f fc 90 <0f> 0b 48 89 df e8 13 ca 6d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc90002717ae8 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: e5acff1a642f8e00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88807f3aa0f8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bbae20 R12: ffffc90002739230
R13: 0000000000000000 R14: ffff88807f3aa1a8 R15: ffff88807f3aa108
FS:  0000000000000000(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f70eefb6ad8 CR3: 00000000348dc000 CR4: 00000000003526f0