BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1db013067 P4D 1db013067 PUD 1db10e067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2394 Comm: kworker/0:63 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: rcu_gp process_srcu
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e37c4ec0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e788b1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d98
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e788b1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e9a4a000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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:538 [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:preempt_count_sub+0x62/0x160 kernel/sched/core.c:4052
Code: c1 81 e1 ff ff ff 7f 39 d9 7c 23 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 55 65 8b 05 f3 a9 bd 7e f7 db 65 01 1d ea a9 bd 7e <5b> 41 5e c3 e8 a5 1d e5 00 85 c0 74 f3 48 c7 c0 84 98 4b 86 48 c1
RSP: 0018:ffff8881e37dfbd0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000001 RBX: 00000000ffffffff RCX: 0000000000000001
RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000001
RBP: 000000000000090e R08: ffffffff82316ca1 R09: ffffed103c6fbf81
R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000001ec
R13: 1ffffffff0c96da9 R14: dffffc0000000000 R15: 0000000000000000
 delay_tsc+0x4b/0xd0 arch/x86/lib/delay.c:66
 try_check_zero+0x2f2/0x360 kernel/rcu/srcutree.c:708
 srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
 process_srcu+0x1ab/0xc40 kernel/rcu/srcutree.c:1241
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
CR2: 0000000000000000
---[ end trace e888a79d97dc0024 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6e09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e37c4ec0
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881e788b1c0
RBP: ffff8881f6e09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9d98
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881e788b1c0
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001e9a4a000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	c1 81 e1 ff ff ff 7f 	roll   $0x7f,-0x1f(%rcx)
   7:	39 d9                	cmp    %ebx,%ecx
   9:	7c 23                	jl     0x2e
   b:	81 fb fe 00 00 00    	cmp    $0xfe,%ebx
  11:	77 07                	ja     0x1a
  13:	0f b6 c0             	movzbl %al,%eax
  16:	85 c0                	test   %eax,%eax
  18:	74 55                	je     0x6f
  1a:	65 8b 05 f3 a9 bd 7e 	mov    %gs:0x7ebda9f3(%rip),%eax        # 0x7ebdaa14
  21:	f7 db                	neg    %ebx
  23:	65 01 1d ea a9 bd 7e 	add    %ebx,%gs:0x7ebda9ea(%rip)        # 0x7ebdaa14
* 2a:	5b                   	pop    %rbx <-- trapping instruction
  2b:	41 5e                	pop    %r14
  2d:	c3                   	ret
  2e:	e8 a5 1d e5 00       	call   0xe51dd8
  33:	85 c0                	test   %eax,%eax
  35:	74 f3                	je     0x2a
  37:	48 c7 c0 84 98 4b 86 	mov    $0xffffffff864b9884,%rax
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1