[patch] Multicast: uninited memory used in filter at IP_DROP_MEMBERSHIP + IP_ADD_MEMBERSHIP

[Bruce Simpson]

Stef Walter wrote:
> ...
> Patch is attached which fixes the problem. Is this the right approach?
> If not, I hope it helps highlight the problem area.
>   

Good catch; thanks for the fix. I used to depend on imf being 
initialized to NULL in this function, however, I opted to keep the old 
vector-style allocation scheme for in_mfilter and track it with in_multi 
on the socket. If the descriptor slot got recycled, then the imf 
contents will be invalid as you saw.

I think this can probably go right in as-is. I'm supposed to be looking 
at other stuff now, so hopefully syrinx@ can check this in if I don't 
get around to it.

thanks,
BMS