BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 525 Comm: udevd Not tainted 5.4.276-syzkaller-00020-g4275fce9fe94 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d48a RBX: 0000000000000100 RCX: ffff8881e9209f80
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e8a3b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d0ce R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff97b8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e8a3b1c0
FS:  00007f0587a38c80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebd0d000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:locks_remove_posix+0x0/0x660 fs/locks.c:2693
Code: 44 89 f1 80 e1 07 38 c1 0f 8c 6c fd ff ff 4c 89 f7 e8 f4 7f e0 ff e9 5f fd ff ff e8 4a 50 87 ff 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 01
RSP: 0018:ffff8881e9127ec0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8199eb9d RBX: 00000000000a801d RCX: ffff8881e9209f80
RDX: 0000000000000000 RSI: ffff8881ec8f63c0 RDI: ffff8881d9e05e00
RBP: 0000000000000000 R08: ffffffff8199eb94 R09: ffffed103b3c0bc8
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881d9e05e00
R13: dffffc0000000000 R14: ffff8881ec8f63c0 R15: 0000000000000000
 filp_close+0xf8/0x140 fs/open.c:1204
 __do_sys_close fs/open.c:1219 [inline]
 __se_sys_close fs/open.c:1217 [inline]
 __x64_sys_close+0x61/0xb0 fs/open.c:1217
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f0587b6737f
Code: af 6a 0d 00 f7 d8 64 89 02 48 83 c8 ff 44 89 c7 48 89 04 24 e8 e1 fc f9 ff 48 8b 04 24 48 83 c4 28 c3 c3 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 7a 6a 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd0ea0a6d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000055a545896330 RCX: 00007f0587b6737f
RDX: 00007f0587c3a860 RSI: 000055a54586fa90 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000009 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000202 R12: 0000000000000000
R13: 000055a544a44100 R14: 00007ffd0ea0ab28 R15: 000055a544a59160
Modules linked in:
CR2: 0000000000000000
---[ end trace a5e168b22b4e234b ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d48a RBX: 0000000000000100 RCX: ffff8881e9209f80
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e8a3b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d0ce R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff97b8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e8a3b1c0
FS:  00007f0587a38c80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebd0d000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	44 89 f1             	mov    %r14d,%ecx
   3:	80 e1 07             	and    $0x7,%cl
   6:	38 c1                	cmp    %al,%cl
   8:	0f 8c 6c fd ff ff    	jl     0xfffffd7a
   e:	4c 89 f7             	mov    %r14,%rdi
  11:	e8 f4 7f e0 ff       	call   0xffe0800a
  16:	e9 5f fd ff ff       	jmp    0xfffffd7a
  1b:	e8 4a 50 87 ff       	call   0xff87506a
  20:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  27:	00 00 00
* 2a:	55                   	push   %rbp <-- trapping instruction
  2b:	48 89 e5             	mov    %rsp,%rbp
  2e:	41 57                	push   %r15
  30:	41 56                	push   %r14
  32:	41 55                	push   %r13
  34:	41 54                	push   %r12
  36:	53                   	push   %rbx
  37:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  3b:	48                   	rex.W
  3c:	81                   	.byte 0x81
  3d:	ec                   	in     (%dx),%al
  3e:	a0                   	.byte 0xa0
  3f:	01                   	.byte 0x1