linux-kernel - Re: [PATCH] input: imon driver for SoundGraph iMON/Antec Veris IR devices

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Date:	Tue, 29 Dec 2009 19:01:32 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Jarod Wilson <jarod@...hat.com>
Cc:	linux-input@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] input: imon driver for SoundGraph iMON/Antec Veris IR
	devices

I ran smatch (http://repo.or.cz/w/smatch.git) on it and there are
some bugs worth fixing.

drivers/input/misc/imon.c +331 free_imon_context(7) error: dereferencing freed memory 'context'
Move the debug line earlier.

drivers/input/misc/imon.c +1812 imon_probe(216) error: dereferencing undefined:  'context->idev'
drivers/input/misc/imon.c +1876 imon_probe(280) error: dereferencing undefined:  'context->touch'
The allocation func can return NULL.  They probably won't fail in real 
life, but it will slightly annoy every person checking running smatch 
over the entire kernel (me).

drivers/input/misc/imon.c +1979 imon_probe(383) error: double unlock 'mutex:&context->lock'
drivers/input/misc/imon.c +1983 imon_probe(387) error: double unlock 'mutex:&context->lock'
It sometimes unlocks both before and after the goto.

regards,
dan carpenter
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