kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 3 PID: 8804 Comm: syz-executor4 Not tainted 4.13.0-next-20170915+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003dca01c0 task.stack: ffff88003cf08000
RIP: 0010:__hlist_del include/linux/list.h:650 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:791 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1309 [inline]
RIP: 0010:__run_timers+0x619/0xb90 kernel/time/timer.c:1620
RSP: 0000:ffff88006df07968 EFLAGS: 00010806
RAX: 1bd5a00000000041 RBX: ffff8800693eba40 RCX: 1ffff1000dbe0f76
RDX: ffff88006df07bb0 RSI: 0000000000000008 RDI: dead000000000208
RBP: ffff88006df07c58 R08: ffff88006df072b8 R09: ffff88006df072b0
R10: ffff88006df07228 R11: 1ffff10007b942cb R12: ffff8800693eba48
R13: dffffc0000000000 R14: dead000000000200 R15: ffff88006df07c30
FS:  0000000000bcf940(0000) GS:ffff88006df00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007033f0 CR3: 000000003a19a000 CR4: 00000000000026e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1646
 __do_softirq+0x2bb/0xbd0 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1d3/0x210 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 smp_apic_timer_interrupt+0x177/0x710 arch/x86/kernel/apic/apic.c:1048
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:577
 </IRQ>
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:331 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:313 [inline]
RIP: 0010:trace_mm_page_alloc include/trace/events/kmem.h:194 [inline]
RIP: 0010:__alloc_pages_nodemask+0x5af/0xd80 mm/page_alloc.c:4225
RSP: 0000:ffff88003cf0edd8 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: 00000000014280ca RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed00079e1db0
RBP: ffff88003cf0efb8 R08: 0000000000040000 R09: ffffed000abc3c00
R10: 0000000000000000 R11: ffffea0001578780 R12: 0000000000000000
R13: ffff88003cf0ef90 R14: ffffea0001578780 R15: ffff88003cf0ef30
 alloc_pages_vma+0xc8/0x4b0 mm/mempolicy.c:1999
 alloc_zeroed_user_highpage_movable include/linux/highmem.h:183 [inline]
 wp_page_copy+0x1171/0x2000 mm/memory.c:2467
 do_wp_page+0x48e/0x25b0 mm/memory.c:2754
 handle_pte_fault mm/memory.c:3926 [inline]
 __handle_mm_fault+0x19ff/0x39c0 mm/memory.c:4034
 handle_mm_fault+0x334/0x8d0 mm/memory.c:4071
 __do_page_fault+0x4f6/0xb60 arch/x86/mm/fault.c:1445
 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1520
 do_async_page_fault+0x72/0xc0 arch/x86/kernel/kvm.c:266
 async_page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1069
RIP: 0033:0x406a7b
RSP: 002b:0000000000a5f8a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000708000 RCX: 0000000000000cfc
RDX: 00000000820c6592 RSI: 0000000000000000 RDI: 00000000ab9c6cfc
RBP: 000000000000000e R08: 0000000000000cfc R09: 0000000000000019
R10: 0000000000a5f960 R11: 0000000000000206 R12: 0000000000000010
R13: 000000000000012e R14: 0000000000000000 R15: 0000000022f8973f
Code: 4d 85 f6 4c 89 32 48 89 95 58 fd ff ff 42 c6 04 28 f8 74 26 e8 a9 33 10 00 49 8d 7e 08 48 8b 95 58 fd ff ff 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 b5 04 00 00 49 89 56 08 e8 83 33 10 00 4c 
RIP: __hlist_del include/linux/list.h:650 [inline] RSP: ffff88006df07968
RIP: detach_timer kernel/time/timer.c:791 [inline] RSP: ffff88006df07968
RIP: expire_timers kernel/time/timer.c:1309 [inline] RSP: ffff88006df07968
RIP: __run_timers+0x619/0xb90 kernel/time/timer.c:1620 RSP: ffff88006df07968
---[ end trace e3e1b17e304a94f0 ]---