linux-kernel - Re: [PATCH BUGFIX -rc5] Smack: Do not dereference NULL ipc object

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Date:	Wed, 19 Mar 2008 15:48:14 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	"Ahmed S. Darwish" <darwish.07@...il.com>
Cc:	Casey Schaufler <casey@...aufler-ca.com>,
	akpm <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH BUGFIX -rc5] Smack: Do not dereference NULL ipc object

* Ahmed S. Darwish (darwish.07@...il.com) wrote:
> In the SYSV ipc msgctl(),semctl(),shmctl() family, if the user passed
> *_INFO as the desired operation, no specific object is meant to be 
> controlled and only system-wide information is returned. This leads
> to a NULL IPC object in the LSM hooks if the _INFO flag is given.
> 
> Avoid dereferencing this NULL pointer in Smack ipc *ctl() methods.

Casey, this looks quite legit to me.  Can you ack please.

thanks,
-chris
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