WARNING: CPU: 1 PID: 3684 at arch/x86/kvm/x86.c:7295 kvm_arch_vcpu_ioctl_run+0x1d4/0x5be0 arch/x86/kvm/x86.c:7295
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3684 Comm: syzkaller134994 Not tainted 4.15.0-rc2-mm1+ #39
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:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1d4/0x5be0 arch/x86/kvm/x86.c:7295
RSP: 0018:ffff8801bdcb76b0 EFLAGS: 00010293
RAX: ffff8801d8736280 RBX: ffff8801d8ed5000 RCX: ffffffff810dee44
RDX: 0000000000000000 RSI: ffffffff863449c0 RDI: ffff8801d93a8e38
RBP: ffff8801bdcb7a40 R08: 1ffff10037b96eff R09: 0000000000000001
R10: ffff8801bdcb7a58 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff10037b96f72 R14: ffff8801d8a71c00 R15: ffff8801d93a8c00
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2555
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x448f69
RSP: 002b:00007fe082f35dc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe082f36700 RCX: 0000000000448f69
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000001a
RBP: 00007fff0d20a5d0 R08: 00007fe082f36700 R09: 00007fe082f36700
R10: 00007fe082f36700 R11: 0000000000000202 R12: 0000000000000000
R13: 00007fff0d20a5cf R14: 00007fe082f369c0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..