linux-kernel - [PATCH 1/3] perf stat: Check return value of asprintf() properly

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Date:   Wed,  2 Jun 2021 14:22:39 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH 1/3] perf stat: Check return value of asprintf() properly

It returns -1 on error, so checking with 0 would not work.

Fixes: 12279429d862 ("perf stat: Uniquify hybrid event name")
Cc: Jin Yao <yao.jin@...ux.intel.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/stat-display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index b759dfd633b4..04afd41b6067 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -564,7 +564,7 @@ static void uniquify_event_name(struct evsel *counter)
 				       counter->name, counter->pmu_name);
 		}
 
-		if (ret) {
+		if (ret > 0) {
 			free(counter->name);
 			counter->name = new_name;
 		}
-- 
2.32.0.rc0.204.g9fa02ecfa5-goog