linux-kernel - [PATCH 03/11] perf tools: Fix resource leak of closedir() on the error paths

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Date:   Thu, 17 Oct 2019 13:02:53 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Yunfeng Ye <yeyunfeng@...wei.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Feilong Lin <linfeilong@...wei.com>,
        Hu Shiyuan <hushiyuan@...wei.com>,
        Igor Lubashev <ilubashe@...mai.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Mark Rutland <mark.rutland@....com>,
        Martin KaFai Lau <kafai@...com>,
        Peter Zijlstra <peterz@...radead.org>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 03/11] perf tools: Fix resource leak of closedir() on the error paths

From: Yunfeng Ye <yeyunfeng@...wei.com>

Both build_mem_topology() and rm_rf_depth_pat() have resource leaks of
closedir() on the error paths.

Fix this by calling closedir() before function returns.

Fixes: e2091cedd51b ("perf tools: Add MEM_TOPOLOGY feature to perf data file")
Fixes: cdb6b0235f17 ("perf tools: Add pattern name checking to rm_rf")
Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: Feilong Lin <linfeilong@...wei.com>
Cc: Hu Shiyuan <hushiyuan@...wei.com>
Cc: Igor Lubashev <ilubashe@...mai.com>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Martin KaFai Lau <kafai@...com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Song Liu <songliubraving@...com>
Cc: Yonghong Song <yhs@...com>
Link: http://lore.kernel.org/lkml/cd5f7cd2-b80d-6add-20a1-32f4f43e0744@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/header.c | 4 +++-
 tools/perf/util/util.c   | 6 ++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 86d9396cb131..becc2d109423 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1296,8 +1296,10 @@ static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp)
 			continue;
 
 		if (WARN_ONCE(cnt >= size,
-			      "failed to write MEM_TOPOLOGY, way too many nodes\n"))
+			"failed to write MEM_TOPOLOGY, way too many nodes\n")) {
+			closedir(dir);
 			return -1;
+		}
 
 		ret = memory_node__read(&nodes[cnt++], idx);
 	}
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 5eda6e19c947..ae56c766eda1 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -154,8 +154,10 @@ static int rm_rf_depth_pat(const char *path, int depth, const char **pat)
 		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
 			continue;
 
-		if (!match_pat(d->d_name, pat))
-			return -2;
+		if (!match_pat(d->d_name, pat)) {
+			ret =  -2;
+			break;
+		}
 
 		scnprintf(namebuf, sizeof(namebuf), "%s/%s",
 			  path, d->d_name);
-- 
2.21.0