netdev - Re: rtnl_mutex deadlock?

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Message-ID: <20150806051901.GA14659@gondor.apana.org.au>
Date:	Thu, 6 Aug 2015 13:19:01 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Daniel Borkmann <daniel@...earbox.net>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Pirko <jiri@...nulli.us>,
	Cong Wang <cwang@...pensource.com>,
	David Miller <davem@...emloft.net>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Thomas Graf <tgraf@...g.ch>, Scott Feldman <sfeldma@...il.com>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: rtnl_mutex deadlock?

On Wed, Aug 05, 2015 at 08:59:07PM +0200, Daniel Borkmann wrote:
> 
> Here's a theory and patch below. Herbert, Thomas, does this make any
> sense to you resp. sound plausible? ;)

Another possibility is the following bug:

https://patchwork.ozlabs.org/patch/503374/

It can cause a use-after-free which may lead to corruption of skb
state, including the cb buffer.  Of course it's a long shot.

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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