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: 276 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__list_add_valid+0xb6/0xe0 lib/list_debug.c:25
Code: 4c 89 fe 4c 89 f2 48 89 d9 e8 b6 64 c9 05 0f 0b 48 c7 c7 00 f8 79 8a e8 a8 64 c9 05 0f 0b 48 c7 c7 a0 f8 79 8a e8 9a 64 c9 05 <0f> 0b 48 c7 c7 00 f9 79 8a 4c 89 f6 48 89 d9 e8 86 64 c9 05 0f 0b
RSP: 0018:ffffc90002cffc90 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: e36ec77b58ccb300
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88807b8fa6c8 R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: ffffc90002651230
R13: 0000000000000000 R14: ffff88807b8fa778 R15: ffff88807b8fa6d8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ef07c36a10 CR3: 000000005ef8b000 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+0x435/0xb40 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 fbb1dba3cedabb80 ]---
RIP: 0010:__list_add_valid+0xb6/0xe0 lib/list_debug.c:25
Code: 4c 89 fe 4c 89 f2 48 89 d9 e8 b6 64 c9 05 0f 0b 48 c7 c7 00 f8 79 8a e8 a8 64 c9 05 0f 0b 48 c7 c7 a0 f8 79 8a e8 9a 64 c9 05 <0f> 0b 48 c7 c7 00 f9 79 8a 4c 89 f6 48 89 d9 e8 86 64 c9 05 0f 0b
RSP: 0018:ffffc90002cffc90 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: e36ec77b58ccb300
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff88807b8fa6c8 R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: ffffc90002651230
R13: 0000000000000000 R14: ffff88807b8fa778 R15: ffff88807b8fa6d8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ef07c36a10 CR3: 000000005ef8b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400