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SubjectRe: 2.2.x BUG & PATCH: recvmsg() does not check msg_controllen correctly
   From: Philippe Troin <>
Date: 03 Nov 2000 19:53:04 -0800

Yes I agree, mixing signed and unsigned arithmetic is evil... Doesn't
gcc have a flag for unsafe signed/unsigned mixtures ?

Would you consider this patch (or a variant) for inclusion ?

I would accept a patch which made the code set fdmax <= 0 when
(msg->msg_controllen < (sizeof(struct cmsghdr) + sizeof(int)))
because it is the sole reason this bug exists at all.

David S. Miller
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