general protection fault, probably for non-canonical address 0xdffffc00000000aa: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000550-0x0000000000000557]
CPU: 1 PID: 12398 Comm: syz-executor.3 Not tainted 5.14.0-rc5-next-20210810-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+0x149/0x1740 block/blk-wbt.c:360
Code: 03 80 3c 02 00 0f 85 68 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 50 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 35 13 00 00 48 8b 9b 50 05 00 00 48 b8 00 00 00
RSP: 0000:ffffc90000dc0cd8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 00000000000000aa RSI: ffffffff83d107dd RDI: 0000000000000550
RBP: ffff88801a827000 R08: 0000000000000003 R09: ffff88801a827183
R10: ffffffff83d107d2 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: ffff888019158b00 R15: ffff88801a8270d0
FS:  0000000003390400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31327358 CR3: 000000001eb5f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1a5/0x6b0 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+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:162 [inline]
RIP: 0010:exit_to_user_mode_prepare+0x143/0x290 kernel/entry/common.c:209
Code: 14 01 00 00 e8 2e b8 ca 07 65 48 8b 04 25 00 f0 01 00 48 8b 18 f7 c3 0e 30 02 00 0f 84 03 ff ff ff e8 21 f9 17 00 fb f6 c3 08 <74> ba e8 66 29 cc 07 f6 c7 10 74 b5 48 89 ef e8 19 7a 34 00 f7 c3
RSP: 0000:ffffc9000517ff30 EFLAGS: 00000202
RAX: 0000000000000007 RBX: 0000000000000008 RCX: 1ffffffff1adb66d
RDX: 0000000000000000 RSI: ffffffff817bd091 RDI: ffffffff8163d71f
RBP: ffffc9000517ff58 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817bd078 R11: 0000000000000000 R12: ffff888019fab900
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:315
 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:643
RIP: 0033:0x41469a
Code: 49 89 dd 48 39 cf 72 2f 48 83 e8 08 48 39 d1 73 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
RSP: 002b:00007ffd46b0e3d0 EFLAGS: 00000283
RAX: 00007fcf08fa0be0 RBX: 00007fcf08f71048 RCX: ffffffff83f00113
RDX: ffffffff83f0005d RSI: 00007fcf08f71050 RDI: ffffffff83f00113
RBP: 00007fcf08f694c8 R08: 00007fcf08fa9588 R09: 0000001b31327370
R10: 0000000000000e50 R11: 00000000402cee53 R12: 00007fcf08f694c0
R13: 00007fcf08f71048 R14: 00007fcf08f694b8 R15: 000000000000001d
Modules linked in:
---[ end trace 404cb44eb61c8e56 ]---
RIP: 0010:latency_exceeded block/blk-wbt.c:237 [inline]
RIP: 0010:wb_timer_fn+0x149/0x1740 block/blk-wbt.c:360
Code: 03 80 3c 02 00 0f 85 68 13 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 50 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 35 13 00 00 48 8b 9b 50 05 00 00 48 b8 00 00 00
RSP: 0000:ffffc90000dc0cd8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 00000000000000aa RSI: ffffffff83d107dd RDI: 0000000000000550
RBP: ffff88801a827000 R08: 0000000000000003 R09: ffff88801a827183
R10: ffffffff83d107d2 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000000 R14: ffff888019158b00 R15: ffff88801a8270d0
FS:  0000000003390400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31327358 CR3: 000000001eb5f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400