linux-kernel - Re: [PATCH v2 1/2] perf parse-events: fix memory leaks found on parse

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Date:   Wed, 29 Apr 2020 10:43:31 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Jiri Olsa <jolsa@...hat.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>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Leo Yan <leo.yan@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 1/2] perf parse-events: fix memory leaks found on parse_events

On Mon, Mar 23, 2020 at 3:59 AM Jiri Olsa <jolsa@...hat.com> wrote:
>
> On Wed, Mar 18, 2020 at 07:31:00PM -0700, Ian Rogers wrote:
> > Memory leaks found by applying LLVM's libfuzzer on the parse_events
> > function.
> >
> > Signed-off-by: Ian Rogers <irogers@...gle.com>
>
> Acked-by: Jiri Olsa <jolsa@...hat.com>
>
> thanks,
> jirka

Ping.

> > ---
> >  tools/perf/util/parse-events.c | 2 ++
> >  tools/perf/util/parse-events.y | 3 ++-
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> > index 593b6b03785d..1e0bec5c0846 100644
> > --- a/tools/perf/util/parse-events.c
> > +++ b/tools/perf/util/parse-events.c
> > @@ -1482,6 +1482,8 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
> >
> >               list_for_each_entry_safe(pos, tmp, &config_terms, list) {
> >                       list_del_init(&pos->list);
> > +                     if (pos->free_str)
> > +                             free(pos->val.str);
> >                       free(pos);
> >               }
> >               return -EINVAL;
> > diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> > index 94f8bcd83582..8212cc771667 100644
> > --- a/tools/perf/util/parse-events.y
> > +++ b/tools/perf/util/parse-events.y
> > @@ -44,7 +44,7 @@ static void free_list_evsel(struct list_head* list_evsel)
> >
> >       list_for_each_entry_safe(evsel, tmp, list_evsel, core.node) {
> >               list_del_init(&evsel->core.node);
> > -             perf_evsel__delete(evsel);
> > +             evsel__delete(evsel);
> >       }
> >       free(list_evsel);
> >  }
> > @@ -326,6 +326,7 @@ PE_NAME opt_pmu_config
> >       }
> >       parse_events_terms__delete($2);
> >       parse_events_terms__delete(orig_terms);
> > +     free(pattern);
> >       free($1);
> >       $$ = list;
> >  #undef CLEANUP_YYABORT
> > --
> > 2.25.1.696.g5e7596f4ac-goog
> >
>