linux-hardening - Re: [PATCH v2 1/7] scsi: mpi3mr: replace deprecated strncpy with assignments

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Date: Wed, 28 Feb 2024 16:02:45 -0800
From: Kees Cook <keescook@...omium.org>
To: Justin Stitt <justinstitt@...gle.com>
Cc: Sathya Prakash Veerichetty <sathya.prakash@...adcom.com>,
	Kashyap Desai <kashyap.desai@...adcom.com>,
	Sumit Saxena <sumit.saxena@...adcom.com>,
	Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
	"James E.J. Bottomley" <jejb@...ux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Suganath Prabu Subramani <suganath-prabu.subramani@...adcom.com>,
	Ariel Elior <aelior@...vell.com>,
	Manish Chopra <manishc@...vell.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Saurav Kashyap <skashyap@...vell.com>,
	Javed Hasan <jhasan@...vell.com>,
	GR-QLogic-Storage-Upstream@...vell.com,
	Nilesh Javali <njavali@...vell.com>,
	Manish Rangankar <mrangankar@...vell.com>,
	Don Brace <don.brace@...rochip.com>,
	mpi3mr-linuxdrv.pdl@...adcom.com, linux-scsi@...r.kernel.org,
	linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
	MPT-FusionLinux.pdl@...adcom.com, netdev@...r.kernel.org,
	storagedev@...rochip.com
Subject: Re: [PATCH v2 1/7] scsi: mpi3mr: replace deprecated strncpy with
 assignments

On Wed, Feb 28, 2024 at 10:59:01PM +0000, Justin Stitt wrote:
> Really, there's no bug with the current code. Let's just ditch strncpy()
> all together.
> 
> We can just copy the const strings instead of reserving room on the
> stack.
> 
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@...r.kernel.org
> Signed-off-by: Justin Stitt <justinstitt@...gle.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook