BUG: kernel NULL pointer dereference, address: 0000000000000050
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000111e62067 P4D 8000000111e62067 PUD 1125b6067 PMD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 UID: 0 PID: 37 Comm: kworker/1:1 Not tainted 6.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_long flush_mdb
RIP: 0010:hfs_mdb_commit+0x12/0x2e0 fs/hfs/mdb.c:268
Code: c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 <f6> 47 50 01 0f 85 85 02 00 00 48 89 fd 4c 8d bf 38 06 00 00 48 8b
RSP: 0018:ffffc90000197dc8 EFLAGS: 00010292
RAX: 0000000080000000 RBX: ffff888101abfd80 RCX: 0000000000000001
RDX: add1a92164c6944e RSI: ffffffff83938230 RDI: 0000000000000000
RBP: ffffffff810bd247 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100086a00
R13: ffff88813bd2f5c0 R14: ffff88811fc6d940 R15: ffff888102ec8000
FS:  0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 0000000107752000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x2ac/0x5c0 kernel/workqueue.c:3312
 worker_thread+0x23e/0x2e0 kernel/workqueue.c:3393
 kthread+0xea/0x100 kernel/kthread.c:389
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
CR2: 0000000000000050
---[ end trace 0000000000000000 ]---
RIP: 0010:hfs_mdb_commit+0x12/0x2e0 fs/hfs/mdb.c:268
Code: c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 <f6> 47 50 01 0f 85 85 02 00 00 48 89 fd 4c 8d bf 38 06 00 00 48 8b
RSP: 0018:ffffc90000197dc8 EFLAGS: 00010292
RAX: 0000000080000000 RBX: ffff888101abfd80 RCX: 0000000000000001
RDX: add1a92164c6944e RSI: ffffffff83938230 RDI: 0000000000000000
RBP: ffffffff810bd247 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100086a00
R13: ffff88813bd2f5c0 R14: ffff88811fc6d940 R15: ffff888102ec8000
FS:  0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000050 CR3: 0000000107752000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	0f 1f 00             	nopl   (%rax)
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	66 0f 1f 00          	nopw   (%rax)
  1c:	55                   	push   %rbp
  1d:	41 57                	push   %r15
  1f:	41 56                	push   %r14
  21:	41 55                	push   %r13
  23:	41 54                	push   %r12
  25:	53                   	push   %rbx
  26:	48 83 ec 18          	sub    $0x18,%rsp
* 2a:	f6 47 50 01          	testb  $0x1,0x50(%rdi) <-- trapping instruction
  2e:	0f 85 85 02 00 00    	jne    0x2b9
  34:	48 89 fd             	mov    %rdi,%rbp
  37:	4c 8d bf 38 06 00 00 	lea    0x638(%rdi),%r15
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b