Subject: [PATCH 15/16] perf: fix memory leak by expr__find_other

From: Changbin Du <[email-masked]>
Date: Sat, 16 Mar 2019 16:05:55 +0800

=================================================================
==7506==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 13 byte(s) in 3 object(s) allocated from:
    #0 0x7f03339d6070 in __interceptor_strdup (/usr/lib/x86_64-linux-gnu/libasan.so.5+0x3b070)
    #1 0x5625e53aaef0 in expr__find_other util/expr.y:221
    #2 0x5625e51bcd3f in test__expr tests/expr.c:52
    #3 0x5625e51528e6 in run_test tests/builtin-test.c:358
    #4 0x5625e5152baf in test_and_print tests/builtin-test.c:388
    #5 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
    #6 0x5625e515572f in cmd_test tests/builtin-test.c:722
    #7 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
    #8 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
    #9 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
    #10 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
    #11 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

Signed-off-by: Changbin Du <[email-masked]>
---
 tools/perf/tests/expr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 01f0706995a9..9acc1e80b936 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -19,7 +19,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
 	const char *p;
 	const char **other;
 	double val;
-	int ret;
+	int i, ret;
 	struct parse_ctx ctx;
 	int num_other;
 
@@ -56,6 +56,9 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
 	TEST_ASSERT_VAL("find other", !strcmp(other[1], "BAZ"));
 	TEST_ASSERT_VAL("find other", !strcmp(other[2], "BOZO"));
 	TEST_ASSERT_VAL("find other", other[3] == NULL);
+
+	for (i = 0; i < num_other; i++)
+		free((void *)other[i]);
 	free((void *)other);
 
 	return 0;
-- 
2.19.1