WARNING: CPU: 0 PID: 18593 at arch/x86/kvm/x86.c:8381 __x86_set_memory_region+0x56e/0x7a0 arch/x86/kvm/x86.c:8381
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 18593 Comm: syz-executor1 Not tainted 4.15.0-rc7-next-20180109+ #92
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:__x86_set_memory_region+0x56e/0x7a0 arch/x86/kvm/x86.c:8381
RSP: 0018:ffff8801c706f6a0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: ffff8801c706f7a8 RCX: ffffffff810b5b1e
RDX: 0000000000004e03 RSI: ffffc90001693000 RDI: 0000000000000286
RBP: ffff8801c706f7d0 R08: 0000000000000000 R09: 1ffff10038e0de8f
R10: ffff8801c706f440 R11: 0000000000000001 R12: ffff8801c706f768
R13: 1ffff10038e0ded9 R14: ffff8801a684c740 R15: 0000000000000000
 x86_set_memory_region+0x3e/0x60 arch/x86/kvm/x86.c:8393
 kvm_arch_destroy_vm+0x7ab/0x980 arch/x86/kvm/x86.c:8409
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:729 [inline]
 kvm_put_kvm+0x695/0xde0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:750
 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:761
 __fput+0x327/0x7e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x199/0x270 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x98/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f99e91ddc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000124
RAX: 000000000000001b RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000000000000 RSI: 000000000000001b RDI: 000000000000001a
RBP: 0000000000000060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee9a0
R13: 00000000ffffffff R14: 00007f99e91de6d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..