From: Daniel Borkmann <dborkman@redhat.com>
Date: Sun, 5 Oct 2014 15:27:50 +0000 (+0200)
Subject: ipv4: igmp: fix v3 general query drop monitor false positive
X-Git-Tag: fixes-against-v3.18-rc2~144^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b47bd8d2795412143a23d2961033c126ce6914d9;p=pandora-kernel.git

ipv4: igmp: fix v3 general query drop monitor false positive

In case we find a general query with non-zero number of sources, we
are dropping the skb as it's malformed.

RFC3376, section 4.1.8. Number of Sources (N):

  This number is zero in a General Query or a Group-Specific Query,
  and non-zero in a Group-and-Source-Specific Query.

Therefore, reflect that by using kfree_skb() instead of consume_skb().

Fixes: d679c5324d9a ("igmp: avoid drop_monitor false positives")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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