linux-kernel - Re: [PATCH] HID: multitouch: prevent memleak with the allocated name

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Message-ID: <alpine.LNX.2.00.1306121114230.6750@pobox.suse.cz>
Date:	Wed, 12 Jun 2013 11:15:21 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:	Benjamin Tissoires <benjamin.tissoires@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Stephane Chatty <chatty@...c.fr>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: multitouch: prevent memleak with the allocated
 name

On Wed, 29 May 2013, Benjamin Tissoires wrote:

> mt_free_input_name() was never called during .remove():
> hid_hw_stop() removes the hid_input items in hdev->inputs, and so the
> list is therefore empty after the call. In the end, we never free the
> special names that has been allocated during .probe().
> 
> Restore the original name before freeing it to avoid acessing already
> freed pointer.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>

I have now applied this one and will send it to Linus for next -rc.

If we are going down the path of using devm API, as proposed by Andy, that 
will require much more throgough review of interaction with input 
subsystem, so definitely not a late -rc regression fix material.

Thanks,

-- 
Jiri Kosina
SUSE Labs
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