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llc: Fix missing msg_namelen update in llc_ui_recvmsg()
For stream sockets the code misses to update 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. The msg_namelen update is also missing for datagram sockets in case the socket is shutting down during receive. Fix both issues by setting msg_namelen to 0 early. It will be updated later if we're going to fill the msg_name member. Cc: Arnaldo Carvalho de Melo <email@example.com> Signed-off-by: Mathias Krause <firstname.lastname@example.org> Signed-off-by: David S. Miller <email@example.com>
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