kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu
WARNING: CPU: 1 PID: 3277 at arch/x86/kvm/x86.c:7375 kvm_arch_vcpu_ioctl_run+0x1c7/0x5cb0 arch/x86/kvm/x86.c:7375
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3277 Comm: syz-executor4 Not tainted 4.15.0-rc4-next-20171221+ #78
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+0x1c7/0x5cb0 arch/x86/kvm/x86.c:7375
RSP: 0018:ffff8801c42176b0 EFLAGS: 00010293
RAX: ffff8801c4268200 RBX: ffff8801c628f000 RCX: ffffffff810df6b7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801c3d49060
RBP: ffff8801c4217a40 R08: 1ffff100387a9ca3 R09: 0000000000000001
R10: ffff8801c4217690 R11: 0000000000000004 R12: 0000000000000000
R13: ffff8801c4c86c00 R14: ffff8801c3d48e40 R15: ffff8801c3d48e40
 kvm_vcpu_ioctl+0x6f1/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2554
 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+0x1f/0x96
RIP: 0033:0x452ac9
RSP: 002b:00007faefe62fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004
RBP: 000000000000039b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2728
R13: 00000000ffffffff R14: 00007faefe6306d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..