linux-hardening - Re: [PATCH] cgroup: Replace all non-returning strlcpy with strscpy

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Date:   Mon, 22 May 2023 09:06:39 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Azeem Shaikh <azeemshaikh38@...il.com>
Cc:     Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        linux-hardening@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroup: Replace all non-returning strlcpy with strscpy

On Wed, May 17, 2023 at 02:49:10PM +0000, Azeem Shaikh 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#strlcpy
> [2] https://github.com/KSPP/linux/issues/89
> 
> Signed-off-by: Azeem Shaikh <azeemshaikh38@...il.com>

Applied to cgroup/for-6.5.

Thanks.

-- 
tejun