WARNING: CPU: 0 PID: 3687 at arch/x86/kvm/x86.c:7305 kvm_arch_vcpu_ioctl_run+0x1bf/0x5bf0 arch/x86/kvm/x86.c:7305
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3687 Comm: syzkaller321988 Not tainted 4.15.0-rc7+ #261
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:kvm_arch_vcpu_ioctl_run+0x1bf/0x5bf0 arch/x86/kvm/x86.c:7305
RSP: 0018:ffff8801d957f6b0 EFLAGS: 00010293
RAX: ffff8801bbe9a500 RBX: ffff8801c281e000 RCX: ffffffff810df29f
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801befa84e0
RBP: ffff8801d957fa40 R08: 1ffff1003b2afeb8 R09: 0000000000000001
R10: ffff8801d957fa58 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff1003b2aff72 R14: ffff8801bc96a080 R15: ffff8801befa82c0
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2582
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x446599
RSP: 002b:00007ff7a5528ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dbc54 RCX: 0000000000446599
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000024f
RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ffd029e3b1f R14: 00007ff7a55299c0 R15: 000000000000000e
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..