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iucv: Fix missing msg_namelen update in iucv_sock_recvmsg()
The current code does not fill the msg_name member in case it is set. It also does not set the msg_namelen member to 0 and therefore makes net/socket.c leak the local, uninitialized sockaddr_storage variable to userland -- 128 bytes of kernel stack memory. Fix that by simply setting msg_namelen to 0 as obviously nobody cared about iucv_sock_recvmsg() not filling the msg_name in case it was set. Cc: Ursula Braun <firstname.lastname@example.org> Signed-off-by: Mathias Krause <email@example.com> Signed-off-by: David S. Miller <firstname.lastname@example.org>
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