general protection fault, probably for non-canonical address 0xdffffc00000000b2: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000590-0x0000000000000597]
CPU: 0 PID: 14696 Comm: syz-executor.3 Not tainted 5.14.0-rc6-next-20210820-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:latency_exceeded block/blk-wbt.c:237 [inline]
RIP: 0010:wb_timer_fn+0x149/0x1750 block/blk-wbt.c:360
Code: 03 80 3c 02 00 0f 85 79 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 90 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 46 13 00 00 48 8b 9b 90 05 00 00 48 b8 00 00 00
RSP: 0000:ffffc90016b47bd8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 00000000000000b2 RSI: ffffffff83d4247d RDI: 0000000000000590
RBP: ffff88801af2bc00 R08: 0000000000000003 R09: ffff88801af2bd83
R10: ffffffff83d42472 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: ffff88801b4e2400 R15: ffff88801af2bcd0
FS:  00000000023bb400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 000000001f9a2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 call_timer_fn+0x1ab/0x6c0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x133/0x190 kernel/softirq.c:636
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x49/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x4146aa
Code: 14 0f 1f 80 00 00 00 00 48 8b 50 f8 48 83 e8 08 48 39 ca 77 f3 48 39 c3 73 3e 48 89 13 48 8b 50 f8 48 89 38 49 8b 0e 48 8b 3e <48> 83 c3 08 48 83 c6 08 eb bc 48 39 d1 72 9e 48 39 d0 73 47 49 89
RSP: 002b:00007ffc48196eb0 EFLAGS: 00000283
RAX: 00007f7ef1a281e0 RBX: 00007f7ef1a27f78 RCX: ffffffff819a9a41
RDX: ffffffff819a9aa4 RSI: 00007f7ef1a27f80 RDI: ffffffff819a9aa4
RBP: 00007f7ef1a27ed8 R08: 00007f7ef1a283f0 R09: 0000001b2d8334e8
R10: 0000000000001b2a R11: 0000000066b55b2d R12: 00007f7ef1a27ed0
R13: 00007f7ef1a27f78 R14: 00007f7ef1a27ec8 R15: 0000000000000018
Modules linked in:
---[ end trace 86f79906b9c85988 ]---
RIP: 0010:latency_exceeded block/blk-wbt.c:237 [inline]
RIP: 0010:wb_timer_fn+0x149/0x1750 block/blk-wbt.c:360
Code: 03 80 3c 02 00 0f 85 79 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 90 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 46 13 00 00 48 8b 9b 90 05 00 00 48 b8 00 00 00
RSP: 0000:ffffc90016b47bd8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 00000000000000b2 RSI: ffffffff83d4247d RDI: 0000000000000590
RBP: ffff88801af2bc00 R08: 0000000000000003 R09: ffff88801af2bd83
R10: ffffffff83d42472 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: ffff88801b4e2400 R15: ffff88801af2bcd0
FS:  00000000023bb400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 000000001f9a2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 79 13             	test   %edi,0x13(%rcx)
   9:	00 00                	add    %al,(%rax)
   b:	48 8b 9b c8 00 00 00 	mov    0xc8(%rbx),%rbx
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	48 8d bb 90 05 00 00 	lea    0x590(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 46 13 00 00    	jne    0x137a
  34:	48 8b 9b 90 05 00 00 	mov    0x590(%rbx),%rbx
  3b:	48                   	rex.W
  3c:	b8                   	.byte 0xb8
  3d:	00 00                	add    %al,(%rax)