------------[ cut here ]------------
kernel BUG at arch/x86/kvm/mmu.c:1194!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 2 PID: 3620 Comm: syz-executor4 Not tainted 4.13.0-rc4-next-20170811 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff880039cd84c0 task.stack: ffff88003b8e0000
RIP: 0010:pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1193
RSP: 0018:ffff88003b8e68c8 EFLAGS: 00010282
RAX: 0000000000000028 RBX: ffff88003db4ac80 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 1ffff1000771ccd9 RDI: ffffed000771cd0d
RBP: ffff88003b8e6908 R08: 0000000000000000 R09: 1ffff1000771ccab
R10: ffff88003b8e6cb0 R11: ffffffff85b2d3b8 R12: ffff88003de77078
R13: 0000000000000000 R14: ffff88003de644c8 R15: ffff88003de644f0
FS:  0000000000000000(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003e3ae000 CR4: 00000000000026e0
Call Trace:
 rmap_remove arch/x86/kvm/mmu.c:1270 [inline]
 drop_spte+0x15a/0x250 arch/x86/kvm/mmu.c:1352
 mmu_page_zap_pte+0x224/0x340 arch/x86/kvm/mmu.c:2484
 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2506 [inline]
 kvm_mmu_prepare_zap_page+0x1c5/0x1310 arch/x86/kvm/mmu.c:2550
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5227 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x4a0/0x680 arch/x86/kvm/mmu.c:5268
 kvm_arch_flush_shadow_all+0x15/0x20 arch/x86/kvm/x86.c:8391
 kvm_mmu_notifier_release+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:508
 __mmu_notifier_release+0x1d5/0x690 mm/mmu_notifier.c:75
 mmu_notifier_release include/linux/mmu_notifier.h:235 [inline]
 exit_mmap+0x479/0x560 mm/mmap.c:2982
 __mmput kernel/fork.c:905 [inline]
 mmput+0x223/0x6e0 kernel/fork.c:927
 exit_mm kernel/exit.c:544 [inline]
 do_exit+0x9a1/0x1b30 kernel/exit.c:852
 do_group_exit+0x149/0x400 kernel/exit.c:968
 get_signal+0x7e8/0x17e0 kernel/signal.c:2330
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266
 entry_SYSCALL_64_fastpath+0xbc/0xbe
RIP: 0033:0x446739
RSP: 002b:00007f0b5cf3fcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00000000007080c8 RCX: 0000000000446739
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000007080c8
RBP: 00000000007080a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0b5cf409c0 R15: 00007f0b5cf40700
Code: 09 8b 5e 00 48 8b 75 d0 48 c7 c7 40 4d e2 84 e8 8e 6b 49 00 0f 0b e8 f2 8a 5e 00 48 8b 75 d0 48 c7 c7 00 4d e2 84 e8 77 6b 49 00 <0f> 0b 4c 89 ef e8 88 8b 92 00 e9 01 fe ff ff 0f 1f 00 55 48 89 
RIP: pte_list_remove+0x3ae/0x3c0 arch/x86/kvm/mmu.c:1193 RSP: ffff88003b8e68c8
---[ end trace 9d5c9d88bb60720e ]---