general protection fault, probably for non-canonical address 0xdffffc0000000022: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000110-0x0000000000000117]
CPU: 0 PID: 5427 Comm: gfs2_quotad Not tainted 6.2.0-rc1-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:gfs2_quota_sync+0x304/0x820 fs/gfs2/quota.c:483
Code: 8b d1 fd 48 8b 5c 24 08 e9 6a 04 00 00 e8 84 8b d1 fd 45 31 ed eb 05 e8 7a 8b d1 fd 49 8d 9d 10 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 8b 6c 24 28 0f 85 83 04 00 00 ff 03 48 8b
RSP: 0018:ffffc9000522fd30 EFLAGS: 00010206
RAX: 0000000000000022 RBX: 0000000000000110 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff888021698a60 R08: dffffc0000000000 R09: fffffbfff1a518e9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888021be2800 R15: ffff888021698000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ba156af680 CR3: 00000000189d4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_quotad+0x407/0x690 fs/gfs2/quota.c:1512
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_quota_sync+0x304/0x820 fs/gfs2/quota.c:483
Code: 8b d1 fd 48 8b 5c 24 08 e9 6a 04 00 00 e8 84 8b d1 fd 45 31 ed eb 05 e8 7a 8b d1 fd 49 8d 9d 10 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 8b 6c 24 28 0f 85 83 04 00 00 ff 03 48 8b
RSP: 0018:ffffc9000522fd30 EFLAGS: 00010206
RAX: 0000000000000022 RBX: 0000000000000110 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff888021698a60 R08: dffffc0000000000 R09: fffffbfff1a518e9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888021be2800 R15: ffff888021698000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffef4468378 CR3: 000000001f3ee000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8b d1                	mov    %ecx,%edx
   2:	fd                   	std
   3:	48 8b 5c 24 08       	mov    0x8(%rsp),%rbx
   8:	e9 6a 04 00 00       	jmp    0x477
   d:	e8 84 8b d1 fd       	call   0xfdd18b96
  12:	45 31 ed             	xor    %r13d,%r13d
  15:	eb 05                	jmp    0x1c
  17:	e8 7a 8b d1 fd       	call   0xfdd18b96
  1c:	49 8d 9d 10 01 00 00 	lea    0x110(%r13),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	48 8b 6c 24 28       	mov    0x28(%rsp),%rbp
  36:	0f 85 83 04 00 00    	jne    0x4bf
  3c:	ff 03                	incl   (%rbx)
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b