From: Mathias Krause <minipli@googlemail.com>
Date: Sun, 7 Apr 2013 01:51:53 +0000 (+0000)
Subject: irda: Fix missing msg_namelen update in  irda_recvmsg_dgram()
X-Git-Tag: v3.2.45~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=402fb9f974f158d747e6c6944336cd9af7f349b2;p=pandora-kernel.git

irda: Fix missing msg_namelen update in  irda_recvmsg_dgram()

[ Upstream commit 5ae94c0d2f0bed41d6718be743985d61b7f5c47d ]

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

Cc: Samuel Ortiz <samuel@sortiz.org>
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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