From: Mathias Krause <minipli@googlemail.com>
Date: Sun, 7 Apr 2013 01:51:47 +0000 (+0000)
Subject: atm: update msg_namelen in vcc_recvmsg()
X-Git-Tag: v3.2.45~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a8c07b253bac436358adb9eb96a37dd223ef120;p=pandora-kernel.git

atm: update msg_namelen in vcc_recvmsg()

[ Upstream commit 9b3e617f3df53822345a8573b6d358f6b9e5ed87 ]

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 vcc_recvmsg() not filling the msg_name in case it was set.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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