syzbot

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kernel BUG at arch/x86/kvm/x86.c:7182!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3002 Comm: syz-executor0 Not tainted 4.14.0-rc1+ #89
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801ceb662c0 task.stack: ffff8801ceb08000
RIP: 0010:complete_emulated_mmio+0x5c2/0x6f0 arch/x86/kvm/x86.c:7182
RSP: 0018:ffff8801ceb0f620 EFLAGS: 00010297
RAX: ffff8801ceb662c0 RBX: ffff8801bfd48080 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801bfd482b8
RBP: ffff8801ceb0f660 R08: 0000000000000000 R09: ffff8801ceb0ef70
R10: ffff8801ceb0fa58 R11: 1ffff10039d6ceeb R12: ffffffff810d57b0
R13: ffff8801d0e6d000 R14: ffff8801d2d73900 R15: ffff8801bfd48080
FS:  00007f47ba461700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001ceaa0000 CR4: 00000000001426f0
Call Trace:
 kvm_arch_vcpu_ioctl_run+0x2df5/0x5b90 arch/x86/kvm/x86.c:7261
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2551
 vfs_ioctl fs/ioctl.c:45 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685
 SYSC_ioctl fs/ioctl.c:700 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x451e59
RSP: 002b:00007f47ba460c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 0000000000451e59
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b7d9c
R13: 00000000ffffffff R14: 0000000020000000 R15: 0000000000fe5000
Code: 01 00 00 00 48 89 df e8 ad b2 47 00 44 89 e6 4c 89 f7 45 31 e4 e8 cf 55 4d 00 45 85 ed 41 0f 94 c4 e9 5f fc ff ff e8 ae 7a 60 00 <0f> 0b e8 a7 2c 95 00 e9 9c fa ff ff 89 45 c8 e8 9a 2c 95 00 8b 
RIP: complete_emulated_mmio+0x5c2/0x6f0 arch/x86/kvm/x86.c:7182 RSP: ffff8801ceb0f620
---[ end trace 906e7d1156cad69b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..