syzbot

Oops: stack segment: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 122 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__list_add_valid_or_report+0x3e/0x130 lib/list_debug.c:29
Code: 00 00 00 48 89 d3 48 85 d2 0f 84 93 00 00 00 49 89 f6 49 89 ff 49 bd 00 00 00 00 00 fc ff df 4c 8d 63 08 4c 89 e5 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 4c 89 e7 e8 22 32 82 fd 4d 39 34 24 75 71
RSP: 0018:ffffc9000395fbb0 EFLAGS: 00010a06
RAX: ffffc900031b1190 RBX: dead000000000100 RCX: dffffc0000000000
RDX: dead000000000100 RSI: ffffc900031b11a0 RDI: ffff888040c7b898
RBP: 1bd5a00000000021 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1ed4d57 R12: dead000000000108
R13: dffffc0000000000 R14: ffffc900031b11a0 R15: ffff888040c7b898
FS:  0000000000000000(0000) GS:ffff888126436000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558ac8ba28 CR3: 00000000213c6000 CR4: 00000000003526f0
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+0x63e/0xe00 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+0x3ef/0xa10 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+0x3e/0x130 lib/list_debug.c:29
Code: 00 00 00 48 89 d3 48 85 d2 0f 84 93 00 00 00 49 89 f6 49 89 ff 49 bd 00 00 00 00 00 fc ff df 4c 8d 63 08 4c 89 e5 48 c1 ed 03 <42> 80 7c 2d 00 00 74 08 4c 89 e7 e8 22 32 82 fd 4d 39 34 24 75 71
RSP: 0018:ffffc9000395fbb0 EFLAGS: 00010a06
RAX: ffffc900031b1190 RBX: dead000000000100 RCX: dffffc0000000000
RDX: dead000000000100 RSI: ffffc900031b11a0 RDI: ffff888040c7b898
RBP: 1bd5a00000000021 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1ed4d57 R12: dead000000000108
R13: dffffc0000000000 R14: ffffc900031b11a0 R15: ffff888040c7b898
FS:  0000000000000000(0000) GS:ffff888126436000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558ac8ba28 CR3: 00000000213c6000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 48 89             	add    %cl,-0x77(%rax)
   5:	d3 48 85             	rorl   %cl,-0x7b(%rax)
   8:	d2 0f                	rorb   %cl,(%rdi)
   a:	84 93 00 00 00 49    	test   %dl,0x49000000(%rbx)
  10:	89 f6                	mov    %esi,%esi
  12:	49 89 ff             	mov    %rdi,%r15
  15:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  1c:	fc ff df
  1f:	4c 8d 63 08          	lea    0x8(%rbx),%r12
  23:	4c 89 e5             	mov    %r12,%rbp
  26:	48 c1 ed 03          	shr    $0x3,%rbp
* 2a:	42 80 7c 2d 00 00    	cmpb   $0x0,0x0(%rbp,%r13,1) <-- trapping instruction
  30:	74 08                	je     0x3a
  32:	4c 89 e7             	mov    %r12,%rdi
  35:	e8 22 32 82 fd       	call   0xfd82325c
  3a:	4d 39 34 24          	cmp    %r14,(%r12)
  3e:	75 71                	jne    0xb1