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From:   Ard Biesheuvel <ardb@kernel.org>
Date:   Thu, 1 Jun 2023 10:35:01 +0200
Message-ID: <CAMj1kXGETX_zD=Us+E3+c0f1Cs3OA3gmZrR3Q-xhdh047V3-TQ@mail.gmail.com>
Subject: Re: [PATCH] ARM: Replace all non-returning strlcpy with strscpy
To:     Linus Walleij <linus.walleij@linaro.org>
Cc:     Azeem Shaikh <azeemshaikh38@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        linux-hardening@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
        Amit Daniel Kachhap <amit.kachhap@arm.com>
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On Wed, 31 May 2023 at 15:30, Linus Walleij <linus.walleij@linaro.org> wrot=
e:
>
> On Tue, May 30, 2023 at 5:55=E2=80=AFPM Azeem Shaikh <azeemshaikh38@gmail=
.com> wrote:
>
> > 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].
> > In an effort to remove strlcpy() completely [2], replace
> > strlcpy() here with strscpy().
> > No return values were used, so direct replacement is safe.
> >
> > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strl=
cpy
> > [2] https://github.com/KSPP/linux/issues/89
> >
> > Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
>
> Please put this into Russell's patch tracker:
> https://www.arm.linux.org.uk/developer/patches/
>

https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=3D9300/1