r0 = openat$urandom(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = socket$packet(0x11, 0x2, 0x300)
dup3(r0, r1, 0x0)
readv(r1, &(0x7f0000000180)=[{&(0x7f0000000040)=""/209, 0xd1}], 0x1)