Re: [PATCH] Revert "bridge: only expire the mdb entry when query is received"

[Cong Wang]

On Sat, Oct 19, 2013 at 3:58 PM, Linus LÃssing <linus.luessing@xxxxxx> wrote:
> While this commit was a good attempt to fix issues occuring when no
> multicast querier is present, this commit still has two more issues:
>
> 1) There are cases where mdb entries do not expire even if there is a
> querier present. The bridge will unnecessarily continue flooding
> multicast packets on the according ports.
>
> 2) Never removing an mdb entry could be exploited for a Denial of
> Service by an attacker on the local link, slowly, but steadily eating up
> all memory.
>

I raised the first issue too when I sent the patch, but Herbert said
it is not a problem. So, I will leave this to Herbert to decide.

For me, your patch makes sense.

Thanks.
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