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    Subject[PATCH 4.1 114/159] ipv6: Make MLD packets to only be processed locally
    Date
    4.1-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Angga <Hermin.Anggawijaya@alliedtelesis.co.nz>

    [ Upstream commit 4c938d22c88a9ddccc8c55a85e0430e9c62b1ac5 ]

    Before commit daad151263cf ("ipv6: Make ipv6_is_mld() inline and use it
    from ip6_mc_input().") MLD packets were only processed locally. After the
    change, a copy of MLD packet goes through ip6_mr_input, causing
    MRT6MSG_NOCACHE message to be generated to user space.

    Make MLD packet only processed locally.

    Fixes: daad151263cf ("ipv6: Make ipv6_is_mld() inline and use it from ip6_mc_input().")
    Signed-off-by: Hermin Anggawijaya <hermin.anggawijaya@alliedtelesis.co.nz>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/ipv6/ip6_input.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    --- a/net/ipv6/ip6_input.c
    +++ b/net/ipv6/ip6_input.c
    @@ -331,10 +331,10 @@ int ip6_mc_input(struct sk_buff *skb)
    if (offset < 0)
    goto out;

    - if (!ipv6_is_mld(skb, nexthdr, offset))
    - goto out;
    + if (ipv6_is_mld(skb, nexthdr, offset))
    + deliver = true;

    - deliver = true;
    + goto out;
    }
    /* unknown RA - process it normally */
    }



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