linux-hardening - Re: [PATCH] drivers/input: Remove all strcpy() uses in favor of strscpy()

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Date:   Sun, 8 Aug 2021 13:30:43 +0200
From:   Len Baker <len.baker@....com>
To:     Joe Perches <joe@...ches.com>
Cc:     Len Baker <len.baker@....com>, Kees Cook <keescook@...omium.org>,
        "Russell King (Oracle)" <linux@...linux.org.uk>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-hardening@...r.kernel.org,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/input: Remove all strcpy() uses in favor of
 strscpy()

Hi,

On Sat, Aug 07, 2021 at 08:17:39AM -0700, Joe Perches wrote:
> On Sat, 2021-08-07 at 16:02 +0200, Len Baker wrote:
> > On Sun, Aug 01, 2021 at 09:44:33AM -0700, Kees Cook wrote:
> []
> > > One thing is clear: replacing strlcpy() with strscpy() is probably the
> > > easiest and best first step to cleaning up the proliferation of str*()
> > > functions.
> >
> > Thanks for all this info. I will work on it (clean up the proliferation
> > of str*() functions).
>
> btw:
>
> It's not possible to sed as the return value is different,
> but here is a cocci script that converts strlcpy to strscpy
> when the return value is unused.
>
>     @@
>     expression e1, e2, e3;
>     @@
>
>     -       strlcpy(
>     +       strscpy(
>             e1, e2, e3);
>
> This cocci script was used on sound/ awhile back.
> see commit 75b1a8f9d62e.

Thanks a lot for your help on this. I will take into account all this info.

Regards,
Len