r0 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$inet6_buf(r0, 0x29, 0x1b, &(0x7f0000000000)="a2bc374dab57d58b9cc3b1b2a0a6f1fa3b2c19d8", 0x14)