list_add corruption. next is NULL.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 110 Comm: jfsCommit Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__list_add_valid_or_report+0xc3/0x130 lib/list_debug.c:27
Code: 4c 89 f2 48 89 d9 e8 0c 2a 6e fc 90 0f 0b 48 c7 c7 40 d6 27 8c e8 fd 29 6e fc 90 0f 0b 48 c7 c7 00 d7 27 8c e8 ee 29 6e fc 90 <0f> 0b 48 89 df e8 53 87 53 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc90002dc7ba8 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 0ce9fc1fab095900
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88804e28f7c0 R08: ffffc90002dc7927 R09: 1ffff920005b8f24
R10: dffffc0000000000 R11: fffff520005b8f25 R12: ffffc90002709340
R13: 0000000000000000 R14: ffff88804e28f870 R15: ffff88804e28f7d0
FS:  0000000000000000(0000) GS:ffff888125554000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3f5dbd4ac CR3: 00000000552a9000 CR4: 0000000000350ef0
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+0x43d/0xaa0 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 0c 2a 6e fc 90 0f 0b 48 c7 c7 40 d6 27 8c e8 fd 29 6e fc 90 0f 0b 48 c7 c7 00 d7 27 8c e8 ee 29 6e fc 90 <0f> 0b 48 89 df e8 53 87 53 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc90002dc7ba8 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 0ce9fc1fab095900
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88804e28f7c0 R08: ffffc90002dc7927 R09: 1ffff920005b8f24
R10: dffffc0000000000 R11: fffff520005b8f25 R12: ffffc90002709340
R13: 0000000000000000 R14: ffff88804e28f870 R15: ffff88804e28f7d0
FS:  0000000000000000(0000) GS:ffff888125554000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3f5dbd4ac CR3: 00000000552a9000 CR4: 0000000000350ef0