tree de70128e6dba1bc818a614bcfe776c94367a5c40
parent a19a19de8310fb8ca2ca0621a9db1aab082943c5
author Linus Lüssing <linus.luessing@c0d3.blue> 1441989588 +0200
committer David S. Miller <davem@davemloft.net> 1442009300 -0700

bridge: fix igmpv3 / mldv2 report parsing

With the newly introduced helper functions the skb pulling is hidden in
the checksumming function - and undone before returning to the caller.

The IGMPv3 and MLDv2 report parsing functions in the bridge still
assumed that the skb is pointing to the beginning of the IGMP/MLD
message while it is now kept at the beginning of the IPv4/6 header,
breaking the message parsing and creating packet loss.

Fixing this by taking the offset between IP and IGMP/MLD header into
account, too.

Fixes: 9afd85c9e455 ("net: Export IGMP/MLD message validation code")
Reported-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Tested-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: David S. Miller <davem@davemloft.net>