netdev - Re: [PATCH] XFRM: Fix memory leak in xfrm_state

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Date:	Fri, 8 Jul 2011 11:00:32 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tushar Gohad <tgohad@...sta.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	tusharsg@...il.com
Subject: Re: [PATCH] XFRM: Fix memory leak in xfrm_state_update

On Thu, Jul 07, 2011 at 06:38:52PM -0700, Tushar Gohad wrote:
>
> Upon "ip xfrm state update ..", xfrm_add_sa() takes an extra reference on 
> the user-supplied SA and forgets to drop the reference when  
> xfrm_state_update() returns 0.  This leads to a memory leak as the  
> parameter SA is never freed.  This change attempts to fix the leak by  
> calling __xfrm_state_put() when xfrm_state_update() updates a valid SA  
> (err = 0).  The parameter SA is added to the gc list when the final  
> reference is dropped by xfrm_add_sa() upon completion.
>
> Signed-off-by: Tushar Gohad <tgohad@...sta.com>

Ouch, thanks for catching this bug!

Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
-- 
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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