general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 106 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x14b/0x9e0 fs/jfs/jfs_logmgr.c:935
Code: a6 b8 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f3 6e e0 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 6e e0 fe 49 8b 3f e8 7f a6 b8 fe
RSP: 0018:ffffc90002677c60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0c3567ec5f1a2400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002677d68 R08: ffffc90002677bc7 R09: ffffc90002677b84
R10: dffffc0000000000 R11: fffff520004cef79 R12: ffff888079c54800
R13: ffffc90002677cc0 R14: ffff88807a0b6038 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8cf721a000 CR3: 000000005b7e6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_syncpt+0x77/0x90 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x2e1/0x520 fs/jfs/jfs_txnmgr.c:550
 txLazyCommit fs/jfs/jfs_txnmgr.c:2685 [inline]
 jfs_lazycommit+0x5a0/0xa70 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:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x14b/0x9e0 fs/jfs/jfs_logmgr.c:935
Code: a6 b8 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 f3 6e e0 fe 4d 8b 3f 49 83 c7 30 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 6e e0 fe 49 8b 3f e8 7f a6 b8 fe
RSP: 0018:ffffc90002677c60 EFLAGS: 00010206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 0c3567ec5f1a2400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002677d68 R08: ffffc90002677bc7 R09: ffffc90002677b84
R10: dffffc0000000000 R11: fffff520004cef79 R12: ffff888079c54800
R13: ffffc90002677cc0 R14: ffff88807a0b6038 R15: 0000000000000030
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff35a5e7158 CR3: 0000000030af2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	a6                   	cmpsb  %es:(%rdi),%ds:(%rsi)
   1:	b8 fe 4d 8d 7e       	mov    $0x7e8d4dfe,%eax
   6:	f0 4c 89 f8          	lock mov %r15,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 f3 6e e0 fe       	call   0xfee06f0f
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 30          	add    $0x30,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 d7 6e e0 fe       	call   0xfee06f0f
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 7f a6 b8 fe       	call   0xfeb8a6bf