linux-kernel - Re: [PATCH] HID: hid-input: Fix accessing freed memory during driver unbind

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Message-ID: <alpine.LNX.2.00.1508011410170.925@pobox.suse.cz>
Date:	Sat, 1 Aug 2015 14:11:40 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	sre@...nel.org, linux-pm@...r.kernel.org,
	"H.J. Lu" <hjl.tools@...il.com>, stable@...r.kernel.org
Subject: Re: [PATCH] HID: hid-input: Fix accessing freed memory during driver
 unbind

On Wed, 29 Jul 2015, Dmitry Torokhov wrote:

> > Another and less intrusive fix would be:
> > 
> >     char *name = dev->battery->desc->name;
> >     struct power_supply_desc *psy_desc = dev->battery->desc;
> >     power_supply_unregister(dev->battery);
> >     kfree(name);
> >     kfree(psy_desc);
> 
> I would much rather prefer this to the other version as it does not
> leave memory hanging around, potentially indefinitely, but ultimately it
> is up to Jiri. 

I must have been in some broken state of mind when applying the original 
one, thanks a lot for catching my brainfart, Dmitry!

Kryzstof, could you please send me properly formatted patch with the 
above, on top of your previous fix?

Thanks.

-- 
Jiri Kosina
SUSE Labs
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