linux-kernel - Re: [PATCH] perf: Replace strlcpy with strscpy

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Message-Id: <169047317156.2400214.7935379824991435172.b4-ty@chromium.org>
Date:   Thu, 27 Jul 2023 08:52:53 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Azeem Shaikh <azeemshaikh38@...il.com>
Cc:     Kees Cook <keescook@...omium.org>, linux-hardening@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: Replace strlcpy with strscpy


On Mon, 03 Jul 2023 16:58:16 +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.
> 
> [...]

Applied, thanks!

[1/1] perf: Replace strlcpy with strscpy
      https://git.kernel.org/kees/c/c9732f1461f9

Best regards,
-- 
Kees Cook