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: 116 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__list_add_valid_or_report+0xc3/0x130
Code: 4c 89 f2 48 89 d9 e8 4c 9e 6f fc 90 0f 0b 48 c7 c7 c0 aa 27 8c e8 3d 9e 6f fc 90 0f 0b 48 c7 c7 80 ab 27 8c e8 2e 9e 6f fc 90 <0f> 0b 48 89 df e8 c3 9a 54 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900030f7ac0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 396be39e66ef9b00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: 0000000000000202 R08: ffffc900030f7847 R09: 1ffff9200061ef08
R10: dffffc0000000000 R11: fffff5200061ef09 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92000545268
FS:  0000000000000000(0000) GS:ffff88818de6d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efffdbe3608 CR3: 00000001ae878000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbUpdatePMap+0x7ec/0xed0
 txAllocPMap+0x1a1/0x6b0
 txUpdateMap+0x2a2/0x9c0
 jfs_lazycommit+0x43d/0xaa0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xc3/0x130
Code: 4c 89 f2 48 89 d9 e8 4c 9e 6f fc 90 0f 0b 48 c7 c7 c0 aa 27 8c e8 3d 9e 6f fc 90 0f 0b 48 c7 c7 80 ab 27 8c e8 2e 9e 6f fc 90 <0f> 0b 48 89 df e8 c3 9a 54 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900030f7ac0 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: 396be39e66ef9b00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: 0000000000000202 R08: ffffc900030f7847 R09: 1ffff9200061ef08
R10: dffffc0000000000 R11: fffff5200061ef09 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92000545268
FS:  0000000000000000(0000) GS:ffff88818de6d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efffdbe3608 CR3: 00000001ae878000 CR4: 00000000000006f0
