netdev - Re: [PATCH 3/3] netlink: Lock out table resizes while dumping Netlink sockets

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Message-ID: <20150121095910.GB25750@gondor.apana.org.au>
Date:	Wed, 21 Jan 2015 20:59:10 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	Patrick McHardy <kaber@...sh.net>, davem@...emloft.net,
	paulmck@...ux.vnet.ibm.com, ying.xue@...driver.com,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH 3/3] netlink: Lock out table resizes while dumping
 Netlink sockets

On Wed, Jan 21, 2015 at 09:56:34AM +0000, Thomas Graf wrote:
>
> Exactly. I think we also need a timer to abort walks because if
> only a single walker is allowed, an attacker could start a walk and
> not complete it to block out everybody else.

My scheme should support an arbitrary number of walks.  See how
xfrm_state_walk is implemented.

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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