linux-kernel - Re: [PATCH 1/2] perf tools: Initialize output buffer in build_id_

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Message-ID: <20201103121535.GD151027@kernel.org>
Date:   Tue, 3 Nov 2020 09:15:35 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/2] perf tools: Initialize output buffer in
 build_id__sprintf

Em Mon, Nov 02, 2020 at 10:50:00PM +0900, Namhyung Kim escreveu:
> Hi Jiri,
> 
> On Mon, Nov 2, 2020 at 8:31 AM Jiri Olsa <jolsa@...nel.org> wrote:
> >
> > We display garbage for undefined build_id objects,
> > because we don't initialize the output buffer.
> >
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> 
> Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks, applied.

- Arnaldo

 
> Thanks
> Namhyung
> 
> 
> > ---
> >  tools/perf/util/build-id.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
> > index 8763772f1095..6b410c3d52dc 100644
> > --- a/tools/perf/util/build-id.c
> > +++ b/tools/perf/util/build-id.c
> > @@ -102,6 +102,8 @@ int build_id__sprintf(const struct build_id *build_id, char *bf)
> >         const u8 *raw = build_id->data;
> >         size_t i;
> >
> > +       bf[0] = 0x0;
> > +
> >         for (i = 0; i < build_id->size; ++i) {
> >                 sprintf(bid, "%02x", *raw);
> >                 ++raw;
> > --
> > 2.26.2
> >

-- 

- Arnaldo