netdev - Re: [PATCH] xfrm: use ISO C standard for array in linux/xfrm.h

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Message-ID: <20121017082731.GB12671@secunet.com>
Date:	Wed, 17 Oct 2012 10:27:31 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:	herbert@...dor.apana.org.au, netdev@...r.kernel.org,
	davem@...emloft.net
Subject: Re: [PATCH] xfrm: use ISO C standard for array in linux/xfrm.h

On Wed, Oct 17, 2012 at 09:50:58AM +0200, Nicolas Dichtel wrote:
> We got a problem with "ip xfrm state add" when compiled with gcc 4.4.6.
> Error was "*** buffer overflow detected ***: ip terminated", because
> when we try to copy the key in struct xfrm_algo, the function
> strncpy() calls some builtin checks about the size of the
> destination buffer, which is 0. With the standard notation, there is
> no problem.

This is likely to be a gcc FORITFY bug. Try to build iproute2 with
the -D_FORTIFY_SOURCE=0 flag.

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