This is a note to let you know that I've just added the patch titled
bridge: fix mdb info leaks
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bridge-fix-mdb-info-leaks.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9e989b12e61b81f93750f9eb5fb5aa147afb7cd9 Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Date: Sat, 9 Mar 2013 05:52:19 +0000
Subject: bridge: fix mdb info leaks
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
[ Upstream commit c085c49920b2f900ba716b4ca1c1a55ece9872cc ]
The bridging code discloses heap and stack bytes via the RTM_GETMDB
netlink interface and via the notify messages send to group RTNLGRP_MDB
afer a successful add/del.
Fix both cases by initializing all unset members/padding bytes with
memset(0).
Cc: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/bridge/br_mdb.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -82,6 +82,7 @@ static int br_mdb_fill_info(struct sk_bu
port = p->port;
if (port) {
struct br_mdb_entry e;
+ memset(&e, 0, sizeof(e));
e.ifindex = port->dev->ifindex;
e.state = p->state;
if (p->addr.proto == htons(ETH_P_IP))
@@ -138,6 +139,7 @@ static int br_mdb_dump(struct sk_buff *s
break;
bpm = nlmsg_data(nlh);
+ memset(bpm, 0, sizeof(*bpm));
bpm->ifindex = dev->ifindex;
if (br_mdb_fill_info(skb, cb, dev) < 0)
goto out;
@@ -173,6 +175,7 @@ static int nlmsg_populate_mdb_fill(struc
return -EMSGSIZE;
bpm = nlmsg_data(nlh);
+ memset(bpm, 0, sizeof(*bpm));
bpm->family = AF_BRIDGE;
bpm->ifindex = dev->ifindex;
nest = nla_nest_start(skb, MDBA_MDB);
@@ -230,6 +233,7 @@ void br_mdb_notify(struct net_device *de
{
struct br_mdb_entry entry;
+ memset(&entry, 0, sizeof(entry));
entry.ifindex = port->dev->ifindex;
entry.addr.proto = group->proto;
entry.addr.u.ip4 = group->u.ip4;
Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are
queue-3.8/bridge-fix-mdb-info-leaks.patch
queue-3.8/dcbnl-fix-various-netlink-info-leaks.patch
queue-3.8/rtnl-fix-info-leak-on-rtm_getlink-request-for-vf-devices.patch
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