Re: [PATCH net] net: flow_dissector: fail on evil iph->ihl

From: David Miller
Date: Sat Nov 02 2013 - 02:17:01 EST

From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Fri, 1 Nov 2013 15:01:10 +0800

> We don't validate iph->ihl which may lead a dead loop if we meet a IPIP
> skb whose iph->ihl is zero. Fix this by failing immediately when iph->ihl
> is evil (less than 5).
> This issue were introduced by commit ec5efe7946280d1e84603389a1030ccec0a767ae
> (rps: support IPIP encapsulation).
> Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
> Cc: Petr Matousek <pmatouse@xxxxxxxxxx>
> Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Cc: Daniel Borkmann <dborkman@xxxxxxxxxx>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>

Applied and queued up for -stable, thanks Jason.
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