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: 107 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 c6 e8 0b 06 0f 0b 48 c7 c7 e0 0c df 8a e8 b8 e8 0b 06 0f 0b 48 c7 c7 80 0d df 8a e8 aa e8 0b 06 <0f> 0b 48 c7 c7 e0 0d df 8a 4c 89 f6 48 89 d9 e8 96 e8 0b 06 0f 0b
RSP: 0018:ffffc90002d47bd0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: b9303c7f1b37d300
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88801d24d21c R08: ffffc90002d478c7 R09: 1ffff920005a8f18
R10: dffffc0000000000 R11: fffff520005a8f19 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805c9223f0 R15: 1ffff920004d3246
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3101fff8 CR3: 000000005fe79000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add include/linux/list.h:69 [inline]
 list_add include/linux/list.h:88 [inline]
 dbUpdatePMap+0x6da/0xdb0 fs/jfs/jfs_dmap.c:577
 txAllocPMap+0x57d/0x6b0 fs/jfs/jfs_txnmgr.c:2426
 txUpdateMap+0x706/0x890 fs/jfs/jfs_txnmgr.c:2364
 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
 jfs_lazycommit+0x425/0xa70 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid+0xb6/0xe0 lib/list_debug.c:25
Code: 4c 89 fe 4c 89 f2 48 89 d9 e8 c6 e8 0b 06 0f 0b 48 c7 c7 e0 0c df 8a e8 b8 e8 0b 06 0f 0b 48 c7 c7 80 0d df 8a e8 aa e8 0b 06 <0f> 0b 48 c7 c7 e0 0d df 8a 4c 89 f6 48 89 d9 e8 96 e8 0b 06 0f 0b
RSP: 0018:ffffc90002d47bd0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: b9303c7f1b37d300
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88801d24d21c R08: ffffc90002d478c7 R09: 1ffff920005a8f18
R10: dffffc0000000000 R11: fffff520005a8f19 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805c9223f0 R15: 1ffff920004d3246
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3101fff8 CR3: 000000005fe79000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400