r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000280)=0x10000)
ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000040)=0x6ff)