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: 0 UID: 0 PID: 103 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__list_add_valid_or_report+0xc3/0x130 lib/list_debug.c:27
Code: 4c 89 f2 48 89 d9 e8 1c 4c 8e fc 90 0f 0b 48 c7 c7 a0 96 c0 8b e8 0d 4c 8e fc 90 0f 0b 48 c7 c7 60 97 c0 8b e8 fe 4b 8e fc 90 <0f> 0b 48 89 df e8 23 75 6d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900018afb28 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: de40020f73a7af00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888043b2e0f8 R08: ffffc900018af8a7 R09: 1ffff92000315f14
R10: dffffc0000000000 R11: fffff52000315f15 R12: ffffc90001389230
R13: 0000000000000000 R14: ffff888043b2e1a8 R15: ffff888043b2e108
FS:  0000000000000000(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 00000000377e7000 CR4: 0000000000352ef0
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+0x510/0xa50 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 1c 4c 8e fc 90 0f 0b 48 c7 c7 a0 96 c0 8b e8 0d 4c 8e fc 90 0f 0b 48 c7 c7 60 97 c0 8b e8 fe 4b 8e fc 90 <0f> 0b 48 89 df e8 23 75 6d fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8
RSP: 0018:ffffc900018afb28 EFLAGS: 00010046
RAX: 0000000000000022 RBX: 0000000000000000 RCX: de40020f73a7af00
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: ffff888043b2e0f8 R08: ffffc900018af8a7 R09: 1ffff92000315f14
R10: dffffc0000000000 R11: fffff52000315f15 R12: ffffc90001389230
R13: 0000000000000000 R14: ffff888043b2e1a8 R15: ffff888043b2e108
FS:  0000000000000000(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 00000000377e7000 CR4: 0000000000352ef0