BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1cfa22067 P4D 1cfa22067 PUD 1c44a6067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.53-syzkaller-00509-g928d72f69121 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881db809c08 EFLAGS: 00010202
RAX: ffffffff813304ec RBX: 0000000000000000 RCX: ffffffff84c14980
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d0ac3180
RBP: ffff8881d0ac31a0 R08: ffffffff81330387 R09: 0000000000000003
R10: ffffed103b701379 R11: 0000000000000004 R12: 0000000000000000
R13: 0000000000000101 R14: ffff8881d0ac3188 R15: ffff8881d0ac3180
FS:  0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c4ec1003 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x154/0x340 kernel/time/timer.c:1415
 expire_timers+0x35c/0x470 kernel/time/timer.c:1460
 __run_timers+0x662/0x7b0 kernel/time/timer.c:1784
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1797
 __do_softirq+0x2d5/0x725 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x16d/0x180 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x281/0x3f0 arch/x86/kernel/apic/apic.c:1146
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: ff e8 d5 0b 42 fd 90 90 90 90 90 65 8b 35 31 3a 2a 7c bf 01 00 00 00 e8 af 96 30 fd e9 07 00 00 00 0f 00 2d 0b 27 49 00 fb f4 <65> 8b 35 12 3a 2a 7c bf ff ff ff ff e9 90 96 30 fd 41 57 41 56 53
RSP: 0018:ffffffff84c07d18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 30498d575214cb01 RBX: ffffffff84c14980 RCX: ffffffff8124c820
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffffff84c07e20 R08: dffffc0000000000 R09: fffffbfff0982931
R10: fffffbfff0982931 R11: 0000000000000000 R12: ffffffff84d913a0
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffffffff0982930
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x209/0x5e0 kernel/sched/idle.c:263
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:355
 start_kernel+0x7a8/0x878 init/main.c:1041
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
CR2: 0000000000000000
---[ end trace aa706dcd02b1f5c1 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881db809c08 EFLAGS: 00010202
RAX: ffffffff813304ec RBX: 0000000000000000 RCX: ffffffff84c14980
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881d0ac3180
RBP: ffff8881d0ac31a0 R08: ffffffff81330387 R09: 0000000000000003
R10: ffffed103b701379 R11: 0000000000000004 R12: 0000000000000000
R13: 0000000000000101 R14: ffff8881d0ac3188 R15: ffff8881d0ac3180
FS:  0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001c4ec1003 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600