linux-kernel - Re: [PATCH 1/1] usbip/userspace/libsrc/names.c: memory leak

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Message-ID: <20140127230212.GA5364@mwanda>
Date:	Tue, 28 Jan 2014 02:02:12 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	xypron.glpk@....de, devel@...verdev.osuosl.org,
	ke42caxa@....cs.fau.de, linux-usb@...r.kernel.org,
	ly80toro@....cs.fau.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] usbip/userspace/libsrc/names.c: memory leak

On Mon, Jan 27, 2014 at 02:50:04PM -0800, Greg KH wrote:
> On Mon, Jan 27, 2014 at 11:29:48PM +0100, xypron.glpk@....de wrote:
> > From: Heinrich Schuchardt <xypron.glpk@....de>
> > 
> > p is freed if NULL.
> 
> Not a real problem, right?
> 
> > p is leaked if second calloc fails.
> 
> You just created a new bug in your "fix" :(
> 
> Please run your patches through scripts/checkpatch.pl, odds are, it
> would have caught this error.
> 

Checkpatch doesn't catch the problems here.  I thought it would have
caught the style issue but apparently it only looks for extra curly
braces when you run it in --file mode.

Fengguang would hopefully have caught the missing curly braces bug with
Coccinelle.

regards,
dan carpenter
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