linux-kernel - Re: strncat() misuse (was: Re: dm_attr_{name,uuid}_show buffer overflow? (was: Re: linux-next: Tree for January 5))

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Message-Id: <200901071539.35810.laurent.pinchart@skynet.be>
Date:	Wed, 7 Jan 2009 15:39:35 +0100
From:	Laurent Pinchart <laurent.pinchart@...net.be>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Milan Broz <mbroz@...hat.com>,
	Alasdair G Kergon <agk@...hat.com>,
	Jaya Kumar <jayakumar.video@...il.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Gene Sally <Gene.Sally@...esys.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: strncat() misuse (was: Re: dm_attr_{name,uuid}_show buffer overflow? (was: Re: linux-next: Tree for January 5))

Hi Geert,

On Monday 05 January 2009, Geert Uytterhoeven wrote:
>
> A quick `git grep strncat' shows a few more misusers of strncat() that may
>
> cause buffer overflows and should be converted to strlcat():
> | drivers/media/video/uvc/uvc_driver.c:
> | 	strncat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",

Thanks for the report. As both the source length is fixed and the destination 
buffer length known, I'll just replace strncat with strcat.

Best regards,

Laurent Pinchart
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