netdev - Re: [PATCH] ipcomp: double free at ipcomp

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Message-Id: <20100216.151434.179169672.davem@davemloft.net>
Date:	Tue, 16 Feb 2010 15:14:34 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	adobriyan@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH] ipcomp: double free at ipcomp_destroy()

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Tue, 16 Feb 2010 13:24:30 +0800

> On Mon, Feb 15, 2010 at 07:28:10PM +0200, Alexey Dobriyan wrote:
>>
>> OK, it survives beating here.
> 
> Thanks a lot for testing! I'll do the clean-up you suggested in
> another patch.  Let's get this fixed first.
> 
> ipcomp: Avoid duplicate calls to ipcomp_destroy
> 
> When ipcomp_tunnel_attach fails we will call ipcomp_destroy twice.
> This may lead to double-frees on certain structures.
> 
> As there is no reason to explicitly call ipcomp_destroy, this patch
> removes it from ipcomp*.c and lets the standard xfrm_state destruction
> take place.
> 
> This is based on the discovery and patch by Alexey Dobriyan.
> 
> Tested-by: Alexey Dobriyan <adobriyan@...il.com>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied to net-2.6
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