From: Mathias Krause <minipli@googlemail.com>
Date: Sun, 7 Apr 2013 01:51:56 +0000 (+0000)
Subject: llc: Fix missing msg_namelen update in llc_ui_recvmsg()
X-Git-Tag: v3.9-rc7~26^2~19^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c77a4b9cffb6215a15196ec499490d116dfad181;p=pandora-kernel.git

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 <acme@ghostprotocols.net>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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