linux-kernel - leds/leds-pca955x.c: small and, probably, hatmless race window

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Message-ID: <Pine.LNX.4.64.0811241053190.4148@axis700.grange>
Date:	Mon, 24 Nov 2008 10:57:33 +0100 (CET)
From:	Guennadi Liakhovetski <lg@...x.de>
To:	rpurdie@...ys.net
cc:	linux-kernel@...r.kernel.org
Subject: leds/leds-pca955x.c: small and, probably, hatmless race window

Hi,

leds/leds-pca955x.c does on two occasions:

	kfree(pca955x);
	i2c_set_clientdata(client, NULL);

which means, between these two calls dev->driver_data points to a freed 
location. One of these two occasions is in probe on the error path, 
another in release, thus, both are, probably, harmless, still would be 
better to fix?

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office@...x.de
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