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: 602 Comm: kworker/1:19 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: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881e6fbee40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ceb7b1c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa7c0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ceb7b1c0
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d8ef6000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 0000200000000300 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x50 kernel/kcov.c:186
Code: 00 00 55 48 89 e5 be 0c 00 00 00 48 c7 c7 00 96 d1 85 e8 6b f2 2d 00 5d c3 00 00 90 90 00 00 90 90 00 55 48 89 e5 48 8b 45 08 <65> 48 8b 0d 90 0e a3 7e 65 8b 15 95 0e a3 7e f7 c2 00 01 1f 00 74
RSP: 0018:ffff8881e6e8fab0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13
RAX: ffffffff82209b0e RBX: 0000000000002af9 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff84da3260 RDI: ffffffff84da3220
RBP: ffff8881e6e8fab0 R08: dffffc0000000000 R09: ffffed103cdd1f79
R10: ffffed103cdd1f79 R11: 1ffff1103cdd1f78 R12: ffffffff84da3220
R13: 1ffff1103cdd1f5c R14: 0000000000000001 R15: ffffffff84da3260
 check_preemption_disabled+0x6e/0x300 lib/smp_processor_id.c:13
 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 1817dd2b6b7b367c ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09cf0 EFLAGS: 00010202
RAX: ffffffff8150a590 RBX: 0000000000000101 RCX: ffff8881e6fbee40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881ceb7b1c0
RBP: ffff8881f6f09d30 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: 00000000ffffa7c0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881ceb7b1c0
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001d8ef6000 CR4: 00000000003406a0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	55                   	push   %rbp
   3:	48 89 e5             	mov    %rsp,%rbp
   6:	be 0c 00 00 00       	mov    $0xc,%esi
   b:	48 c7 c7 00 96 d1 85 	mov    $0xffffffff85d19600,%rdi
  12:	e8 6b f2 2d 00       	call   0x2df282
  17:	5d                   	pop    %rbp
  18:	c3                   	ret
  19:	00 00                	add    %al,(%rax)
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	00 00                	add    %al,(%rax)
  1f:	90                   	nop
  20:	90                   	nop
  21:	00 55 48             	add    %dl,0x48(%rbp)
  24:	89 e5                	mov    %esp,%ebp
  26:	48 8b 45 08          	mov    0x8(%rbp),%rax
* 2a:	65 48 8b 0d 90 0e a3 	mov    %gs:0x7ea30e90(%rip),%rcx        # 0x7ea30ec2 <-- trapping instruction
  31:	7e
  32:	65 8b 15 95 0e a3 7e 	mov    %gs:0x7ea30e95(%rip),%edx        # 0x7ea30ece
  39:	f7 c2 00 01 1f 00    	test   $0x1f0100,%edx
  3f:	74                   	.byte 0x74