linux-kernel - Re: [PATCH v1] perf symbol: Avoid an undefined behavior warning

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Message-ID: <CAM9d7cgMwX_HuO-Yv6neoDjbCseu=EsobXPcfX_0U+ZjGBQR+Q@mail.gmail.com>
Date:   Sat, 16 Sep 2023 22:29:03 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf symbol: Avoid an undefined behavior warning

On Wed, Sep 13, 2023 at 9:42 PM Ian Rogers <irogers@...gle.com> wrote:
>
> The node (nd) may be NULL and pointer arithmetic on NULL is undefined
> behavior. Move the computation of next below the NULL check on the
> node.
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Applied to perf-tools-next, thanks!

Namhyung