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Message-Id: <20200313230249.78825-1-irogers@google.com>
Date: Fri, 13 Mar 2020 16:02:49 -0700
From: Ian Rogers <irogers@...gle.com>
To: 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@...hat.com>,
Namhyung Kim <namhyung@...nel.org>,
Andi Kleen <ak@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Leo Yan <leo.yan@...aro.org>, linux-kernel@...r.kernel.org,
clang-built-linux@...glegroups.com
Cc: Stephane Eranian <eranian@...gle.com>,
Ian Rogers <irogers@...gle.com>
Subject: [PATCH] perf parse-events: fix 3 use after frees
Reproducible with a clang asan build and then running perf test in
particular 'Parse event definition strings'.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/util/parse-events.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a14995835d85..593b6b03785d 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1449,7 +1449,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
auto_merge_stats, NULL);
if (evsel) {
- evsel->pmu_name = name;
+ evsel->pmu_name = name ? strdup(name) : NULL;
evsel->use_uncore_alias = use_uncore_alias;
return 0;
} else {
@@ -1497,7 +1497,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
evsel->snapshot = info.snapshot;
evsel->metric_expr = info.metric_expr;
evsel->metric_name = info.metric_name;
- evsel->pmu_name = name;
+ evsel->pmu_name = name ? strdup(name) : NULL;
evsel->use_uncore_alias = use_uncore_alias;
evsel->percore = config_term_percore(&evsel->config_terms);
}
@@ -1547,7 +1547,7 @@ int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
if (!parse_events_add_pmu(parse_state, list,
pmu->name, head,
true, true)) {
- pr_debug("%s -> %s/%s/\n", config,
+ pr_debug("%s -> %s/%s/\n", str,
pmu->name, alias->str);
ok++;
}
--
2.25.1.481.gfbce0eb801-goog
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