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authorLinus Lüssing <linus.luessing@web.de>2011-02-15 13:19:18 +0000
committerDavid S. Miller <davem@davemloft.net>2011-02-22 10:07:26 -0800
commit649e984d00416cb1a254fdbebd6d3f9fa01c32fa (patch)
treef55db589cf188c833680f64622a6baee407e78ca /net
parent9cc6e0c4c457f84bedcfb04e7dd58a36909c4ef7 (diff)
downloadlinux-linaro-stable-649e984d00416cb1a254fdbebd6d3f9fa01c32fa.tar.gz
bridge: Fix IPv6 multicast snooping by correcting offset in MLDv2 report
We actually want a pointer to the grec_nsrcr and not the following field. Otherwise we can get very high values for *nsrcs as the first two bytes of the IPv6 multicast address are being used instead, leading to a failing pskb_may_pull() which results in MLDv2 reports not being parsed. Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_multicast.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 17708fccf1ee..d69beaf83627 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1013,7 +1013,7 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
nsrcs = skb_header_pointer(skb,
len + offsetof(struct mld2_grec,
- grec_mca),
+ grec_nsrcs),
sizeof(_nsrcs), &_nsrcs);
if (!nsrcs)
return -EINVAL;