kvm: emulating exchange as write
------------[ cut here ]------------
WARNING: CPU: 0 PID: 10741 at arch/x86/kvm/x86.c:7526 kvm_arch_vcpu_ioctl_run+0x145/0x5ae0 arch/x86/kvm/x86.c:7526
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10741 Comm: syz-executor.0 Not tainted 4.14.230-syzkaller #0
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+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x145/0x5ae0 arch/x86/kvm/x86.c:7526
RSP: 0018:ffff888038b67af0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff8880a2063000 RCX: ffffc90013692000
RDX: 0000000000000311 RSI: ffffffff810b09f5 RDI: ffff88803a4f03e8
RBP: ffff888038b67c40 R08: ffff8880941c6580 R09: 0000000000000001
R10: ffff888038b67c60 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88803a4f0298 R14: 0000000000000000 R15: ffff88803a4f01c0
 kvm_vcpu_ioctl+0x3de/0xc50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007f4c13f72188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffdd256e07f R14: 00007f4c13f72300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..