BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e40a2067 P4D 1e40a2067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2185 Comm: kworker/1:42 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: rcu_gp process_srcu
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881cf460fc0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e82471c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa1e0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e82471c0
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e53a1000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x81d/0xb60 kernel/time/timer.c:1817
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x236/0x660 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x197/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:delay_tsc+0x5d/0xc0 arch/x86/lib/delay.c:68
Code: 90 49 89 d4 49 c1 e4 20 49 09 c4 4d 29 fc 49 39 dc 73 55 bf 01 00 00 00 e8 b0 43 1b fd 65 8b 05 c5 5c dc 7b 85 c0 74 1d f3 90 <bf> 01 00 00 00 e8 e9 41 1b fd e8 a4 69 fa fd 41 39 c6 75 0e 0f 01
RSP: 0018:ffff8881e4effb88 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000000 RBX: 0000000000002af9 RCX: 0000000000000000
RDX: 0000000000000020 RSI: 0000000000000001 RDI: 00000000ffffffff
RBP: ffff8881e4effba8 R08: dffffc0000000000 R09: ffffed103c9dff79
R10: ffffed103c9dff79 R11: 1ffff1103c9dff78 R12: 0000000000001371
R13: 0000000000002d71 R14: 0000000000000001 R15: 000000201029b27f
 __delay arch/x86/lib/delay.c:161 [inline]
 __const_udelay+0x61/0x70 arch/x86/lib/delay.c:175
 try_check_zero+0x2dc/0x350 kernel/rcu/srcutree.c:708
 srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
 process_srcu+0x183/0xc60 kernel/rcu/srcutree.c:1241
 process_one_work+0x73b/0xcc0 kernel/workqueue.c:2290
 worker_thread+0xa5c/0x13b0 kernel/workqueue.c:2436
 kthread+0x31e/0x3a0 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
CR2: 0000000000000000
---[ end trace 2a9bd690237ceb8a ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010206
RAX: ffffffff8150a590 RBX: 0000000000000100 RCX: ffff8881cf460fc0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e82471c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa1e0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e82471c0
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e53a1000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	49 89 d4             	mov    %rdx,%r12
   4:	49 c1 e4 20          	shl    $0x20,%r12
   8:	49 09 c4             	or     %rax,%r12
   b:	4d 29 fc             	sub    %r15,%r12
   e:	49 39 dc             	cmp    %rbx,%r12
  11:	73 55                	jae    0x68
  13:	bf 01 00 00 00       	mov    $0x1,%edi
  18:	e8 b0 43 1b fd       	call   0xfd1b43cd
  1d:	65 8b 05 c5 5c dc 7b 	mov    %gs:0x7bdc5cc5(%rip),%eax        # 0x7bdc5ce9
  24:	85 c0                	test   %eax,%eax
  26:	74 1d                	je     0x45
  28:	f3 90                	pause
* 2a:	bf 01 00 00 00       	mov    $0x1,%edi <-- trapping instruction
  2f:	e8 e9 41 1b fd       	call   0xfd1b421d
  34:	e8 a4 69 fa fd       	call   0xfdfa69dd
  39:	41 39 c6             	cmp    %eax,%r14d
  3c:	75 0e                	jne    0x4c
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1