BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1e16a3067 P4D 1e16a3067 PUD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1760 Comm: kworker/0:35 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:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881eac2af40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e57ff1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffb8f0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e57ff1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebed5000 CR4: 00000000003406b0
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:check_preemption_disabled+0x47/0x300 lib/smp_processor_id.c:13
Code: fc 65 48 8b 04 25 28 00 00 00 48 89 44 24 60 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 2c 1b 3c 85 48 c7 44 24 30 a0 9a 20 82 <4c> 8d 6c 24 20 49 c1 ed 03 48 b8 f1 f1 f1 f1 00 f3 f3 f3 48 b9 00
RSP: 0018:ffff8881eb14fac0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: b5364d53b211c200 RBX: 0000000000002af9 RCX: ffff8881eac2af40
RDX: 0000000000000000 RSI: ffffffff84da3260 RDI: ffffffff84da3220
RBP: ffff8881eb14fb68 R08: dffffc0000000000 R09: ffffed103d629f79
R10: ffffed103d629f79 R11: 1ffff1103d629f78 R12: ffffffff84da3220
R13: 000000000000123d R14: 0000000000000000 R15: ffffffff84da3260
 debug_smp_processor_id+0x1c/0x20 lib/smp_processor_id.c:57
 delay_tsc+0x6c/0xc0 arch/x86/lib/delay.c:79
 __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 55c9d3576961e16c ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881eac2af40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881e57ff1c0
RBP: ffff8881f6e09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: 00000000ffffb8f0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e57ff1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebed5000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	fc                   	cld
   1:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
   8:	00 00
   a:	48 89 44 24 60       	mov    %rax,0x60(%rsp)
   f:	48 c7 44 24 20 b3 8a 	movq   $0x41b58ab3,0x20(%rsp)
  16:	b5 41
  18:	48 c7 44 24 28 2c 1b 	movq   $0xffffffff853c1b2c,0x28(%rsp)
  1f:	3c 85
  21:	48 c7 44 24 30 a0 9a 	movq   $0xffffffff82209aa0,0x30(%rsp)
  28:	20 82
* 2a:	4c 8d 6c 24 20       	lea    0x20(%rsp),%r13 <-- trapping instruction
  2f:	49 c1 ed 03          	shr    $0x3,%r13
  33:	48 b8 f1 f1 f1 f1 00 	movabs $0xf3f3f300f1f1f1f1,%rax
  3a:	f3 f3 f3
  3d:	48                   	rex.W
  3e:	b9                   	.byte 0xb9