kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu
WARNING: CPU: 1 PID: 4266 at arch/x86/kvm/emulate.c:5654 x86_emulate_insn+0xd01/0x3cf0 arch/x86/kvm/emulate.c:5654
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4266 Comm: syz-executor2 Not tainted 4.15.0-rc1+ #115
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+0x18/0x20 arch/x86/entry/entry_64.S:930
RIP: 0010:x86_emulate_insn+0xd01/0x3cf0 arch/x86/kvm/emulate.c:5654
RSP: 0018:ffff8801cbf5f2b8 EFLAGS: 00010293
RAX: ffff8801cd20a3c0 RBX: 1ffff100397ebe60 RCX: ffffffff81153d11
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffff8801cb3ea8c8
RBP: ffff8801cbf5f3c8 R08: ffff8801cb3e8080 R09: ffffffff85224cc0
R10: 0000000000000001 R11: ffffed003967d534 R12: 00000000000000ff
R13: ffff8801cb3ea8a0 R14: 0000000000000002 R15: ffff8801cb3ea9c3
 x86_emulate_instruction+0x411/0x1ad0 arch/x86/kvm/x86.c:5769
 emulate_instruction arch/x86/include/asm/kvm_host.h:1164 [inline]
 complete_emulated_io arch/x86/kvm/x86.c:7188 [inline]
 complete_emulated_pio+0xdd/0x1b0 arch/x86/kvm/x86.c:7199
 kvm_arch_vcpu_ioctl_run+0x2db2/0x5c60 arch/x86/kvm/x86.c:7303
 kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2574
 kvm_vcpu_compat_ioctl+0x364/0x450 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2769
 C_SYSC_ioctl fs/compat_ioctl.c:1473 [inline]
 compat_SyS_ioctl+0x151/0x2a30 fs/compat_ioctl.c:1419
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125
RIP: 0023:0xf7f54c79
RSP: 002b:00000000f7f5008c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000000ae80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..