syzbot

60kernel:0  
gStopped at    savectx+0xae:   movl    $0,%gs:0x688
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 444969   9390      0           0  0x4000000    1K syz-executor
* 57389   3669      0           0          0    0  syz-executor
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7e7716291410, count: 14
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