audit: type=1400 audit(1588115356.478:8): avc:  denied  { execmem } for  pid=6333 comm="syz-executor167" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
faulting far call emulation tainted memory
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6338 at arch/x86/kvm/x86.c:7541 kvm_arch_vcpu_ioctl_run+0xe7/0xfd0 arch/x86/kvm/x86.c:7541
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6338 Comm: syz-executor167 Not tainted 4.14.177-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+0x13e/0x194 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 report_bug+0x20a/0x248 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:963
RIP: 0010:kvm_arch_vcpu_ioctl_run+0xe7/0xfd0 arch/x86/kvm/x86.c:7541
RSP: 0018:ffff888097db7c00 EFLAGS: 00010297
RAX: ffff8880975006c0 RBX: ffff8880a9323000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888097db8268
RBP: ffff888097db8040 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888097db8118 R14: ffff888097db845c R15: ffff888097db8040
 kvm_vcpu_ioctl+0x3df/0xc70 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/0xfe0 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+0x42/0xb7
RIP: 0033:0x449c09
RSP: 002b:00007fcf543f3ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dfc58 RCX: 0000000000449c09
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00000000006dfc50 R08: 00007fcf543f4700 R09: 0000000000000000
R10: 00007fcf543f4700 R11: 0000000000000246 R12: 00000000006dfc5c
R13: 00007ffc3bcf55cf R14: 00007fcf543f49c0 R15: 20c49ba5e353f7cf
Kernel Offset: disabled
Rebooting in 86400 seconds..