r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000280), 0x0, 0x0)
ioctl$TIOCSPTLCK(r0, 0x40045431, &(0x7f0000000000))
r1 = ioctl$TIOCGPTPEER(r0, 0x5441, 0x0)
ioctl$TCSETSF2(r0, 0x402c542d, &(0x7f0000000040)={0x0, 0x0, 0x0, 0x7fffffff, 0x0, "7b6a6db7ab7160f567c4aab6af173c18bdc3ec"})
readv(r1, &(0x7f0000000580)=[{&(0x7f0000000080)=""/106, 0x6a}], 0x1)