Re: [PATCH net] bridge: fix igmpv3 / mldv2 report parsing

From: Linus Lüssing <redacted>
Date: Fri, 11 Sep 2015 18:39:48 +0200

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 <redacted>
Tested-by: Tobias Powalowski <redacted>
Signed-off-by: Linus Lüssing <redacted>

There were many serious regressions introduced by that commit, I'm
extremely disappointed.

Patch applied and queued up for -stable, thanks.