linux-kernel - [PATCH 14/16] perf: fix a memory leak of cpu

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Message-Id: <20190316080556.3075-15-changbin.du@gmail.com>
Date:   Sat, 16 Mar 2019 16:05:54 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     namhyung@...nel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexei Starovoitov <ast@...nel.org>, rostedt@...dmis.org,
        Daniel Borkmann <daniel@...earbox.net>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Changbin Du <changbin.du@...il.com>
Subject: [PATCH 14/16] perf: fix a memory leak of cpu_map object

=================================================================
==7497==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7f0333a88f30 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xedf30)
    #1 0x5625e5326213 in cpu_map__trim_new util/cpumap.c:45
    #2 0x5625e5326703 in cpu_map__read util/cpumap.c:103
    #3 0x5625e53267ef in cpu_map__read_all_cpu_map util/cpumap.c:120
    #4 0x5625e5326915 in cpu_map__new util/cpumap.c:135
    #5 0x5625e517b355 in test__openat_syscall_event_on_all_cpus tests/openat-syscall-all-cpus.c:36
    #6 0x5625e51528e6 in run_test tests/builtin-test.c:358
    #7 0x5625e5152baf in test_and_print tests/builtin-test.c:388
    #8 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
    #9 0x5625e515572f in cmd_test tests/builtin-test.c:722
    #10 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
    #11 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
    #12 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
    #13 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
    #14 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

Signed-off-by: Changbin Du <changbin.du@...il.com>
---
 tools/perf/tests/openat-syscall-all-cpus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/openat-syscall-all-cpus.c b/tools/perf/tests/openat-syscall-all-cpus.c
index c531e6deb104..493ecb611540 100644
--- a/tools/perf/tests/openat-syscall-all-cpus.c
+++ b/tools/perf/tests/openat-syscall-all-cpus.c
@@ -45,7 +45,7 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
 	if (IS_ERR(evsel)) {
 		tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
 		pr_debug("%s\n", errbuf);
-		goto out_thread_map_delete;
+		goto out_cpu_map_delete;
 	}
 
 	if (perf_evsel__open(evsel, cpus, threads) < 0) {
@@ -119,6 +119,8 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
 	perf_evsel__close_fd(evsel);
 out_evsel_delete:
 	perf_evsel__delete(evsel);
+out_cpu_map_delete:
+	cpu_map__put(cpus);
 out_thread_map_delete:
 	thread_map__put(threads);
 	return err;
-- 
2.19.1