BUG: kernel NULL pointer dereference, address: 0000000000000058
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 2301b1067 P4D 2301b1067 PUD 230109067 PMD 0 
Oops: 0000 [#1] SMP
CPU: 0 PID: 2995 Comm: gfs2_quotad Not tainted 5.1.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:gfs2_glock_hold+0x1/0x30 fs/gfs2/glock.c:159
Code: 89 fc 53 48 8d 5f 20 48 89 df e8 1a c9 b3 00 4c 89 e6 31 ff e8 f0 f0 ff ff 48 89 df e8 f8 c9 b3 00 5b 41 5c 5d c3 0f 1f 00 55 <8b> 47 58 48 89 e5 85 c0 78 0b 48 83 c7 20 e8 1c b4 11 00 5d c3 48
RSP: 0018:ffffc9000139bde0 EFLAGS: 00010202
RAX: ffff8882362f6f80 RBX: ffff88822d580000 RCX: ffffc9000139be10
RDX: 0000000000000400 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000139bdf0 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88822d5fa410 R11: 0000000000000001 R12: 0000000000000bb8
R13: ffff88822d5fa000 R14: ffff888220970000 R15: ffff888220971600
FS:  0000000000000000(0000) GS:ffff888237a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000058 CR3: 00000002301e6000 CR4: 0000000000340ef0
Call Trace:
 gfs2_glock_nq_init fs/gfs2/glock.h:226 [inline]
 gfs2_statfs_sync+0x67/0x1f0 fs/gfs2/super.c:594
 gfs2_quotad+0x204/0x29d fs/gfs2/quota.c:1549
 kthread+0x119/0x130 kernel/kthread.c:253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: 0000000000000058
---[ end trace 6d87c088630ed95d ]---
RIP: 0010:gfs2_glock_hold+0x1/0x30 fs/gfs2/glock.c:159
Code: 89 fc 53 48 8d 5f 20 48 89 df e8 1a c9 b3 00 4c 89 e6 31 ff e8 f0 f0 ff ff 48 89 df e8 f8 c9 b3 00 5b 41 5c 5d c3 0f 1f 00 55 <8b> 47 58 48 89 e5 85 c0 78 0b 48 83 c7 20 e8 1c b4 11 00 5d c3 48
RSP: 0018:ffffc9000139bde0 EFLAGS: 00010202
RAX: ffff8882362f6f80 RBX: ffff88822d580000 RCX: ffffc9000139be10
RDX: 0000000000000400 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000139bdf0 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88822d5fa410 R11: 0000000000000001 R12: 0000000000000bb8
R13: ffff88822d5fa000 R14: ffff888220970000 R15: ffff888220971600
FS:  0000000000000000(0000) GS:ffff888237a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000058 CR3: 00000002301e6000 CR4: 0000000000340ef0
----------------
Code disassembly (best guess):
   0:	89 fc                	mov    %edi,%esp
   2:	53                   	push   %rbx
   3:	48 8d 5f 20          	lea    0x20(%rdi),%rbx
   7:	48 89 df             	mov    %rbx,%rdi
   a:	e8 1a c9 b3 00       	call   0xb3c929
   f:	4c 89 e6             	mov    %r12,%rsi
  12:	31 ff                	xor    %edi,%edi
  14:	e8 f0 f0 ff ff       	call   0xfffff109
  19:	48 89 df             	mov    %rbx,%rdi
  1c:	e8 f8 c9 b3 00       	call   0xb3ca19
  21:	5b                   	pop    %rbx
  22:	41 5c                	pop    %r12
  24:	5d                   	pop    %rbp
  25:	c3                   	ret
  26:	0f 1f 00             	nopl   (%rax)
  29:	55                   	push   %rbp
* 2a:	8b 47 58             	mov    0x58(%rdi),%eax <-- trapping instruction
  2d:	48 89 e5             	mov    %rsp,%rbp
  30:	85 c0                	test   %eax,%eax
  32:	78 0b                	js     0x3f
  34:	48 83 c7 20          	add    $0x20,%rdi
  38:	e8 1c b4 11 00       	call   0x11b459
  3d:	5d                   	pop    %rbp
  3e:	c3                   	ret
  3f:	48                   	rex.W