linux-kernel - Re: [patch] rapidio: potential null deref on failure path

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Message-ID: <20110321145948.GP2008@bicker>
Date:	Mon, 21 Mar 2011 17:59:48 +0300
From:	Dan Carpenter <error27@...il.com>
To:	"Bounine, Alexandre" <Alexandre.Bounine@....com>
Cc:	Matt Porter <mporter@...nel.crashing.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] rapidio: potential null deref on failure path

On Mon, Mar 21, 2011 at 05:49:06AM -0700, Bounine, Alexandre wrote:
> Better to combine both conditions:
> 
> if (rio_is_switch(rdev) && rswitch->route_table))
>  		kfree(rswitch->route_table);
> 
> Because there is situation when routine fails to allocate route_table
> for a switch.
> 

kfree() accepts NULL pointers.  People have been removing these checks
all over the tree by the hundreds...  Sorry I should have mentioned 
that.

regards,
dan carpenter


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