Re: [PATCH net v2] bridge: mcast: Fix MLD2 Report IPv6 payload length check

[David Miller]

From: Linus Lüssing <linus.luessing@xxxxxxxxx>
Date: Sun,  5 Jul 2020 21:10:17 +0200

> Commit e57f61858b7c ("net: bridge: mcast: fix stale nsrcs pointer in
> igmp3/mld2 report handling") introduced a bug in the IPv6 header payload
> length check which would potentially lead to rejecting a valid MLD2 Report:
> 
> The check needs to take into account the 2 bytes for the "Number of
> Sources" field in the "Multicast Address Record" before reading it.
> And not the size of a pointer to this field.
> 
> Fixes: e57f61858b7c ("net: bridge: mcast: fix stale nsrcs pointer in igmp3/mld2 report handling")
> Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Linus Lüssing <linus.luessing@xxxxxxxxx>

Applied and queued up for -stable, thank you.