[PATCH] perf bench: futex: Fix memory leak of perf_cpu_map__new

From: Sohaib Mohamed <sohaib.amhmd@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: sohaib.amhmd@gmail.com, irogers@google.com,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Darren Hart" <dvhart@infradead.org>,
	"Davidlohr Bueso" <dave@stgolabs.net>,
	"André Almeida" <andrealmeid@collabora.com>,
	"Arnaldo Carvalho de Melo" <acme@kernel.org>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	"Jiri Olsa" <jolsa@redhat.com>,
	"Namhyung Kim" <namhyung@kernel.org>,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Subject: [PATCH] perf bench: futex: Fix memory leak of perf_cpu_map__new
Date: Fri, 12 Nov 2021 22:11:33 +0200	[thread overview]
Message-ID: <20211112201134.77892-1-sohaib.amhmd@gmail.com> (raw)

ASan reports memory leaks while running:

$ sudo ./perf bench futex all

The leaks are caused by perf_cpu_map__new not being freed.
This patch adds the missing perf_cpu_map__put since it calls
cpu_map_delete implicitly.

Fixes: 9c3516d1b850 ("libperf: Add perf_cpu_map__new()/perf_cpu_map__read() functions")

Signed-off-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
---
 tools/perf/bench/futex-lock-pi.c       | 1 +
 tools/perf/bench/futex-requeue.c       | 1 +
 tools/perf/bench/futex-wake-parallel.c | 1 +
 tools/perf/bench/futex-wake.c          | 1 +
 4 files changed, 4 insertions(+)

diff --git a/tools/perf/bench/futex-lock-pi.c b/tools/perf/bench/futex-lock-pi.c
index 5d1fe9c35807..137890f78e17 100644
--- a/tools/perf/bench/futex-lock-pi.c
+++ b/tools/perf/bench/futex-lock-pi.c
@@ -233,6 +233,7 @@ int bench_futex_lock_pi(int argc, const char **argv)
 	print_summary();

 	free(worker);
+	perf_cpu_map__put(cpu);
 	return ret;
 err:
 	usage_with_options(bench_futex_lock_pi_usage, options);
diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c
index 97fe31fd3a23..f7a5ffebb940 100644
--- a/tools/perf/bench/futex-requeue.c
+++ b/tools/perf/bench/futex-requeue.c
@@ -294,6 +294,7 @@ int bench_futex_requeue(int argc, const char **argv)
 	print_summary();

 	free(worker);
+	perf_cpu_map__put(cpu);
 	return ret;
 err:
 	usage_with_options(bench_futex_requeue_usage, options);
diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c
index e970e6b9ad53..0983f40b4b40 100644
--- a/tools/perf/bench/futex-wake-parallel.c
+++ b/tools/perf/bench/futex-wake-parallel.c
@@ -329,6 +329,7 @@ int bench_futex_wake_parallel(int argc, const char **argv)
 	print_summary();

 	free(blocked_worker);
+	perf_cpu_map__put(cpu);
 	return ret;
 }
 #endif /* HAVE_PTHREAD_BARRIER */
diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c
index 77f058a47790..2226a475e782 100644
--- a/tools/perf/bench/futex-wake.c
+++ b/tools/perf/bench/futex-wake.c
@@ -222,5 +222,6 @@ int bench_futex_wake(int argc, const char **argv)
 	print_summary();

 	free(worker);
+	perf_cpu_map__put(cpu);
 	return ret;
 }
--
2.25.1

