linux-kernel - Re: [2.6 patch] security/selinux/netlabel.c: fix double free

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Message-ID: <20080128223540.GN8767@does.not.exist>
Date:	Tue, 29 Jan 2008 00:35:40 +0200
From:	Adrian Bunk <bunk@...nel.org>
To:	Paul Moore <paul.moore@...com>
Cc:	James Morris <jmorris@...ei.org>, sds@...ho.nsa.gov,
	eparis@...isplace.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] security/selinux/netlabel.c: fix double free

On Mon, Jan 28, 2008 at 05:23:46PM -0500, Paul Moore wrote:
> On Monday 28 January 2008 5:09:38 pm Adrian Bunk wrote:
> > This patch fixes a double free (security_netlbl_sid_to_secattr()
> > already calls netlbl_secattr_destroy() when it returns !0) introduced
> > by commit 45c950e0f839fded922ebc0bfd59b1081cc71b70 and spotted by the
> > Coverity checker.
> 
> Hi Adrian,

Hi Paul,

> Thanks for finding this mistake, however, I'd rather see it fixed by 
> removing the netlbl_secattr_destroy() call in 
> security_netlbl_sid_to_secattr() as it really shouldn't be there 
> anymore.  We moved the matching _init() call into 
> selinux_netlbl_sock_setsid() and I'd like to see the _init() and 
> _destroy() calls done in the same function.  I can push a revised patch 
> for this if you would prefer, otherwise I'll be happy to ack an updated 
> version ...

doing the patch is trivial but you are able to write a better 
changelog for it - just push a revised patch.

> paul moore

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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