r0 = openat$urandom(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0)
preadv2(r0, &(0x7f0000000080)=[{&(0x7f0000000140)=""/173, 0xad}], 0x1, 0x0, 0x0, 0x1f)