Message-ID: <513A29B6.9080008@igalia.com>
Date: Fri, 08 Mar 2013 19:11:02 +0100
From: =?ISO-8859-1?Q?Samuel_Iglesias_Gons=E1lvez?= <siglesias@igalia.com>
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To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: industrypack-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
        Jens Taprogge <jens.taprogge@taprogge.org>
Subject: Re: [PATCH 1/3] ipack: avoid double free on device->id
References: <512DCB33.6030500@igalia.com> <1362730907-10047-1-git-send-email-siglesias@igalia.com> <20130308174701.GA13276@kroah.com>
In-Reply-To: <20130308174701.GA13276@kroah.com>
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On 03/08/2013 06:47 PM, Greg Kroah-Hartman wrote:
> On Fri, Mar 08, 2013 at 09:21:45AM +0100, Samuel Iglesias
> Gonsalvez wrote:
>> Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> 
>> --- drivers/ipack/ipack.c |    1 + 1 file changed, 1 
>> insertion(+)
>> 
>> diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c index 
>> 7ec6b20..599d4ff 100644 --- a/drivers/ipack/ipack.c +++ 
>> b/drivers/ipack/ipack.c @@ -24,6 +24,7 @@ static void 
>> ipack_device_release(struct device *dev) { struct ipack_device 
>> *device = to_ipack_dev(dev); kfree(device->id); +	device->id = 
>> NULL;
> 
> How does that keep anything from being freed twice?
> 
>> device->release(device);
> 
> device should now be gone after this call, right?  What am I 
> missing?
> 

Yes, you are right. It's not possible to have it freed twice once it's
in ipack_device_release().

You can skip this patch. If you want, I can resend the others accordingly.

Sam

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