netdev - Re: [v1 PATCH 7/14] netfilter: Use rhashtable_lookup instead of lookup

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Message-ID: <20150320221021.GA24140@gondor.apana.org.au>
Date:	Sat, 21 Mar 2015 09:10:21 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [v1 PATCH 7/14] netfilter: Use rhashtable_lookup instead of
 lookup_compare

On Fri, Mar 20, 2015 at 10:07:51PM +0000, Thomas Graf wrote:
>
> Attack by whom? If I read the nft_set code correctly then the only
> way to add to an nft_set is via nfnetlink which requires
> CAP_NET_ADMIN. My understanding was that the chain length based
> growth is to counter hash seed attacks.

You cannot trust root in a namespace.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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