BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1ae6b7067 P4D 1ae6b7067 PUD 1ae6b8067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W         5.4.65-syzkaller-00172-g48ad97696bbb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881db909cc8 EFLAGS: 00010002
RAX: ffffffff813289cc RBX: 0000000000200000 RCX: ffff8881da9b8f80
RDX: 0000000080000101 RSI: 0000000000000000 RDI: ffff8881c866b1c0
RBP: ffff8881c866b1e0 R08: ffffffff81328867 R09: ffffed103b7246ef
R10: ffffed103b7246ef R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000101 R14: ffff8881c866b1c8 R15: ffff8881c866b1c0
FS:  0000000000000000(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ae6b6003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x154/0x340 kernel/time/timer.c:1416
 expire_timers+0x3bc/0x470 kernel/time/timer.c:1456
 __run_timers+0x602/0x730 kernel/time/timer.c:1792
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1805
 __do_softirq+0x22e/0x569 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: 90 90 90 90 90 90 90 90 90 90 90 65 8b 35 81 23 2f 7c bf 01 00 00 00 e8 7f 5c 35 fd e9 07 00 00 00 0f 00 2d 5b 10 4e 00 fb f4 <65> 8b 35 62 23 2f 7c bf ff ff ff ff e9 60 5c 35 fd 41 57 41 56 53
RSP: 0018:ffff8881da9e7d78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 840ab71902fce101 RBX: ffff8881da9b8f80 RCX: ffffffff81249270
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881da9e7e80 R08: dffffc0000000000 R09: ffffed103b5371f1
R10: ffffed103b5371f1 R11: 0000000000000000 R12: ffffffff84d92be0
R13: 0000000000000001 R14: dffffc0000000000 R15: 1ffff1103b5371f0
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x209/0x5c0 kernel/sched/idle.c:263
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:355
 start_secondary+0x33f/0x3d0 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
CR2: 0000000000000000
---[ end trace 31c6faf8d2d7e0e6 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881db909cc8 EFLAGS: 00010002
RAX: ffffffff813289cc RBX: 0000000000200000 RCX: ffff8881da9b8f80
RDX: 0000000080000101 RSI: 0000000000000000 RDI: ffff8881c866b1c0
RBP: ffff8881c866b1e0 R08: ffffffff81328867 R09: ffffed103b7246ef
R10: ffffed103b7246ef R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000101 R14: ffff8881c866b1c8 R15: ffff8881c866b1c0
FS:  0000000000000000(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ae6b6003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400