BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 199852067 P4D 199852067 PUD 199853067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.70-syzkaller-00061-g54d2c66faf42 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881da9c7b08 EFLAGS: 00010206
RAX: ffffffff813288ec RBX: 0000000000000000 RCX: ffff8881da9bcd80
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881c74b31c0
RBP: ffff8881c74b31e0 R08: ffffffff81328787 R09: ffffed103b7046ef
R10: ffffed103b7046ef R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000100 R14: ffff8881c74b31c8 R15: ffff8881c74b31c0
FS:  0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000199851003 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 call_timer_fn+0x154/0x340 kernel/time/timer.c:1416
 expire_timers+0x35c/0x470 kernel/time/timer.c:1461
 __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
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:603
 smpboot_thread_fn+0x4f2/0x880 kernel/smpboot.c:165
 kthread+0x317/0x340 kernel/kthread.c:268
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: 0000000000000000
---[ end trace a88e6298f3c72d35 ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881da9c7b08 EFLAGS: 00010206
RAX: ffffffff813288ec RBX: 0000000000000000 RCX: ffff8881da9bcd80
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881c74b31c0
RBP: ffff8881c74b31e0 R08: ffffffff81328787 R09: ffffed103b7046ef
R10: ffffed103b7046ef R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000100 R14: ffff8881c74b31c8 R15: ffff8881c74b31c0
FS:  0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000199851003 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400