Valgrind does not like uninitialized bytes used in a syscall. In this
case the buffer is an out buffer but since valgrind doesn't know that
it complains. Initializing to zero fixes the warning:
Syscall param socketcall.sendto(msg) points to uninitialised byte(s)
at 0x5162C4D: send (send.c:28)
by 0x457AF4: l_checksum_update (checksum.c:319)
by 0x43C03C: eap_wsc_handle_m2 (eap-wsc.c:842)
by 0x43CD33: eap_wsc_handle_request (eap-wsc.c:1048)
by 0x43A3A7: __eap_handle_request.part.0 (eap.c:266)
by 0x41A426: eapol_rx_packet.part.12 (eapol.c:2262)
by 0x41B536: __eapol_rx_packet (eapol.c:2650)
by 0x407C80: netdev_control_port_frame_event (netdev.c:3542)
by 0x407C80: netdev_unicast_notify (netdev.c:3684)
by 0x4598C5: dispatch_unicast_watches (genl.c:899)
by 0x4598C5: process_unicast (genl.c:918)
by 0x4598C5: received_data (genl.c:1039)
by 0x456452: io_callback (io.c:126)
by 0x45569D: l_main_iterate (main.c:473)
by 0x45576B: l_main_run (main.c:520)
Address 0x1ffeffe290 is on thread 1's stack
in frame #2, created by eap_wsc_handle_m2 (eap-wsc.c:797)
5661e886d8