kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu
WARNING: CPU: 1 PID: 3723 at arch/x86/kvm/emulate.c:5630 x86_emulate_insn+0xd01/0x3c20 arch/x86/kvm/emulate.c:5630
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3723 Comm: syz-executor0 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:x86_emulate_insn+0xd01/0x3c20 arch/x86/kvm/emulate.c:5630
RSP: 0018:ffff8801c8e173e8 EFLAGS: 00010293
RAX: ffff8801c8910500 RBX: 1ffff100391c2e86 RCX: ffffffff81153e01
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff8801d419b988
RBP: ffff8801c8e174f8 R08: ffff8801d4198100 R09: ffffffff85624d80
R10: 0000000000000001 R11: ffffed003a83374c R12: 00000000000000ff
R13: ffff8801d419b960 R14: 0000000000000002 R15: ffff8801d419ba83
 x86_emulate_instruction+0x411/0x1ad0 arch/x86/kvm/x86.c:5756
 emulate_instruction arch/x86/include/asm/kvm_host.h:1177 [inline]
 complete_emulated_io arch/x86/kvm/x86.c:7174 [inline]
 complete_emulated_pio+0xdd/0x1b0 arch/x86/kvm/x86.c:7185
 kvm_arch_vcpu_ioctl_run+0x283f/0x5be0 arch/x86/kvm/x86.c:7291
 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: 0033:0x452a39
RSP: 002b:00007fe8d1991c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007fe8d19926d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..