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Message-Id: <1297811961-19249-3-git-send-email-linus.luessing@web.de> Date: Wed, 16 Feb 2011 00:19:18 +0100 From: Linus Lüssing <linus.luessing@....de> To: Stephen Hemminger <shemminger@...ux-foundation.org>, "David S. Miller" <davem@...emloft.net>, bridge@...ts.linux-foundation.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Herbert Xu <herbert@...dor.apana.org.au>, Linus Lüssing <linus.luessing@....de> Subject: [PATCH 2/5] 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@....de> --- net/bridge/br_multicast.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 135d929..45dcf10 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1014,7 +1014,7 @@ 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; -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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