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: 756 Comm: syz-executor.1 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e3e06e40
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881d6a4b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9df8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d6a4b1c0
FS:  0000555556f9d480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebc30000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:__get_fault_gfp_mask mm/memory.c:2305 [inline]
RIP: 0010:__handle_mm_fault mm/memory.c:4080 [inline]
RIP: 0010:handle_mm_fault+0x417/0x4990 mm/memory.c:4189
Code: 00 00 48 8b 44 24 58 42 80 3c 28 00 74 08 4c 89 e7 e8 fd b4 08 00 49 3b 1c 24 0f 84 c4 02 00 00 e8 de cf d8 ff e9 3c fe ff ff <e8> d4 cf d8 ff 41 bc c0 0c 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04
RSP: 0000:ffff8881e2157c60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1103d9ec239 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000080 RSI: 0000000000000000 RDI: ffff8881e2157dc8
RBP: ffff8881e2157ea0 R08: dffffc0000000000 R09: ffff8881e2157d48
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e2157d40
R13: dffffc0000000000 R14: ffff8881ecf61128 R15: ffff8881e2157d4c
 do_user_addr_fault arch/x86/mm/fault.c:1469 [inline]
 __do_page_fault+0x509/0xbb0 arch/x86/mm/fault.c:1530
 page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206
RIP: 0033:0x7f1c61338cd4
Code: 16 c7 00 48 8d 05 5c 16 c7 00 49 8b 92 c0 02 00 00 66 49 0f 6e c1 66 48 0f 6e c8 49 8b 82 c8 02 00 00 66 0f 6c c0 66 0f 6c c9 <48> 89 42 08 48 89 10 31 c0 0f 11 05 3c 16 c7 00 0f 11 0d 25 16 c7
RSP: 002b:00007fffac010450 EFLAGS: 00010246
RAX: 00007f1c61faa310 RBX: 0000000000000000 RCX: 00007f1c61338f0d
RDX: 00007f1c61faa310 RSI: 0000000000000018 RDI: 0000555556f9d760
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f1c61faa320
R10: 0000555556f9d480 R11: 00007f1c61faa320 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
CR2: 0000000000000000
---[ end trace 679bfeb7cbaa8b8c ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0000:ffff8881f6f09d18 EFLAGS: 00010206
RAX: ffffffff8154d7aa RBX: 0000000000000100 RCX: ffff8881e3e06e40
RDX: 0000000080000100 RSI: 0000000000000000 RDI: ffff8881d6a4b1c0
RBP: ffff8881f6f09ec8 R08: ffffffff8154d3ee R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 00000000ffff9df8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881d6a4b1c0
FS:  0000555556f9d480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001ebc30000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
   7:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   c:	74 08                	je     0x16
   e:	4c 89 e7             	mov    %r12,%rdi
  11:	e8 fd b4 08 00       	call   0x8b513
  16:	49 3b 1c 24          	cmp    (%r12),%rbx
  1a:	0f 84 c4 02 00 00    	je     0x2e4
  20:	e8 de cf d8 ff       	call   0xffd8d003
  25:	e9 3c fe ff ff       	jmp    0xfffffe66
* 2a:	e8 d4 cf d8 ff       	call   0xffd8d003 <-- trapping instruction
  2f:	41 bc c0 0c 00 00    	mov    $0xcc0,%r12d
  35:	4c 89 f8             	mov    %r15,%rax
  38:	48 c1 e8 03          	shr    $0x3,%rax
  3c:	42                   	rex.X
  3d:	0f                   	.byte 0xf
  3e:	b6 04                	mov    $0x4,%dh