linux-kernel - Re: [alsa-devel] [PATCH] Fix for possible null pointer dereference in dma.c

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Message-ID: <537BADAD.5070904@gmail.com>
Date:	Tue, 20 May 2014 21:31:57 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	Andrew Eikum <aeikum@...eweavers.com>
CC:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Mark Brown <broonie@...nel.org>, alsa-devel@...a-project.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	Sangbeom Kim <sbkim73@...sung.com>,
	linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
	Takashi Iwai <tiwai@...e.de>,
	linux-samsung-soc@...r.kernel.org, Ben Dooks <ben-linux@...ff.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [alsa-devel] [PATCH] Fix for possible null pointer dereference
 in dma.c



On 20.05.2014 21:29, Andrew Eikum wrote:
> On Tue, May 20, 2014 at 09:16:59PM +0200, Tomasz Figa wrote:
>> To me having NULL as either data argument of buffer done callback or
>> private_data would be a serious driver bug and IMHO it's better to let
>> it crash with a NULL pointer dereference to let someone notice than mask
>> it by adding a condition.
>>
> 
> Please, no.  Regardless of who is at fault, crashes in library code
> are insanely frustrating to application developers.  Error codes can
> be handled nicely and expressed to the user as an error message.
> Crashes are hideous for end users and usually end up being support
> nightmares for developers.

How is the related code a library?

Best regards,
Tomasz
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