linux-hardening - Re: [PATCH v2] scsi: zfcp: Replace strlcpy() with strscpy()

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Date: Tue, 05 Dec 2023 20:53:48 -0500
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: Kees Cook <keescook@...omium.org>
Cc: "Martin K. Petersen" <martin.petersen@...cle.com>,
        "James E.J.
 Bottomley" <jejb@...ux.ibm.com>,
        Steffen Maier <maier@...ux.ibm.com>,
        Benjamin Block <bblock@...ux.ibm.com>,
        Heiko Carstens
 <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander
 Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger
 <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Azeem
 Shaikh <azeemshaikh38@...il.com>, linux-s390@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2] scsi: zfcp: Replace strlcpy() with strscpy()


Kees,

> strlcpy() reads the entire source buffer first. This read may exceed
> the destination size limit. This is both inefficient and can lead to
> linear read overflows if a source string is not NUL-terminated[1].
> Additionally, it returns the size of the source string, not the
> resulting size of the destination string. In an effort to remove
> strlcpy() completely[2], replace strlcpy() here with strscpy().

Applied to 6.8/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering