diff options
| author | Ulrich Weber <ulrich.weber@sophos.com> | 2012-03-05 04:52:44 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-03-19 08:57:46 -0700 |
| commit | b77a726051a42d382ec1d20c49b3a60bf7dd54d8 (patch) | |
| tree | b0e94c47d5184c9e5cd20daf83671a30902726c7 /net | |
| parent | 6046dc7d1b061d0f8e820757716de7df5079aa35 (diff) | |
bridge: check return value of ipv6_dev_get_saddr()
[ Upstream commit d1d81d4c3dd886d5fa25a2c4fa1e39cb89613712 ]
otherwise source IPv6 address of ICMPV6_MGM_QUERY packet
might be random junk if IPv6 is disabled on interface or
link-local address is not yet ready (DAD).
Signed-off-by: Ulrich Weber <ulrich.weber@sophos.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bridge/br_multicast.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 995cbe0ac0b..c23a4b18331 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -446,8 +446,11 @@ static struct sk_buff *br_ip6_multicast_alloc_query(struct net_bridge *br, ip6h->nexthdr = IPPROTO_HOPOPTS; ip6h->hop_limit = 1; ipv6_addr_set(&ip6h->daddr, htonl(0xff020000), 0, 0, htonl(1)); - ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, - &ip6h->saddr); + if (ipv6_dev_get_saddr(dev_net(br->dev), br->dev, &ip6h->daddr, 0, + &ip6h->saddr)) { + kfree_skb(skb); + return NULL; + } ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); hopopt = (u8 *)(ip6h + 1); |