Messages in this thread | | | Date | Mon, 28 Oct 2019 22:07:12 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH v4 4/9] perf tools: splice events onto evlist even on error |
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On Fri, Oct 25, 2019 at 11:08:22AM -0700, Ian Rogers wrote: > If event parsing fails the event list is leaked, instead splice the list > onto the out result and let the caller cleanup. > > An example input for parse_events found by libFuzzer that reproduces > this memory leak is 'm{'. > > Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
thanks, jirka
> --- > tools/perf/util/parse-events.c | 17 +++++++++++------ > 1 file changed, 11 insertions(+), 6 deletions(-) > > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c > index c516d0cce946..4c4c6f3e866a 100644 > --- a/tools/perf/util/parse-events.c > +++ b/tools/perf/util/parse-events.c > @@ -1952,15 +1952,20 @@ int parse_events(struct evlist *evlist, const char *str, > > ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS); > perf_pmu__parse_cleanup(); > + > + if (!ret && list_empty(&parse_state.list)) { > + WARN_ONCE(true, "WARNING: event parser found nothing\n"); > + return -1; > + } > + > + /* > + * Add list to the evlist even with errors to allow callers to clean up. > + */ > + perf_evlist__splice_list_tail(evlist, &parse_state.list); > + > if (!ret) { > struct evsel *last; > > - if (list_empty(&parse_state.list)) { > - WARN_ONCE(true, "WARNING: event parser found nothing\n"); > - return -1; > - } > - > - perf_evlist__splice_list_tail(evlist, &parse_state.list); > evlist->nr_groups += parse_state.nr_groups; > last = evlist__last(evlist); > last->cmdline_group_boundary = true; > -- > 2.24.0.rc0.303.g954a862665-goog >
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