WARNING: CPU: 0 PID: 3192 at ./arch/x86/include/asm/fpu/internal.h:340 paravirt_write_msr arch/x86/include/asm/paravirt.h:21 [inline]
WARNING: CPU: 0 PID: 3192 at ./arch/x86/include/asm/fpu/internal.h:340 wrmsrl arch/x86/include/asm/paravirt.h:149 [inline]
WARNING: CPU: 0 PID: 3192 at ./arch/x86/include/asm/fpu/internal.h:340 load_seg_legacy arch/x86/kernel/process_64.c:255 [inline]
WARNING: CPU: 0 PID: 3192 at ./arch/x86/include/asm/fpu/internal.h:340 __switch_to+0x10bd/0x13c0 arch/x86/kernel/process_64.c:455
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3192 Comm: syzkaller835319 Not tainted 4.15.0-rc4-mm1+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
Shutting down cpus with NMI
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user [me m  or41y .3ac65ce0s98s
] 
Rebooting in 86400 seconds..
---[ end trace 2d2aa5997809e25d ]---