linux-kernel - [PATCH] perf c2c: Fix memory leak in c2c_he

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Message-ID: <9d5f26f8-9429-bcb6-d491-cb789f761ea2@huawei.com>
Date:   Fri, 25 Oct 2019 17:42:47 +0800
From:   Yunfeng Ye <yeyunfeng@...wei.com>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...hat.com>, <namhyung@...nel.org>
CC:     <linux-kernel@...r.kernel.org>,
        "hushiyuan@...wei.com" <hushiyuan@...wei.com>,
        "linfeilong@...wei.com" <linfeilong@...wei.com>
Subject: [PATCH] perf c2c: Fix memory leak in c2c_he_zalloc()

A memory leak in c2c_he_zalloc() is found by visual inspection.

Fix this by adding memory free on the error paths in c2c_he_zalloc().

Fixes: 7f834c2e84bb ("perf c2c report: Display node for cacheline address")
Fixes: 1e181b92a2da ("perf c2c report: Add 'node' sort key")
Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
---
 tools/perf/builtin-c2c.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index e69f44941aad..ad7d38a9dcbe 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -138,21 +138,29 @@ static void *c2c_he_zalloc(size_t size)

 	c2c_he->cpuset = bitmap_alloc(c2c.cpus_cnt);
 	if (!c2c_he->cpuset)
-		return NULL;
+		goto free_c2c_he;

 	c2c_he->nodeset = bitmap_alloc(c2c.nodes_cnt);
 	if (!c2c_he->nodeset)
-		return NULL;
+		goto free_cpuset;

 	c2c_he->node_stats = zalloc(c2c.nodes_cnt * sizeof(*c2c_he->node_stats));
 	if (!c2c_he->node_stats)
-		return NULL;
+		goto free_nodeset;

 	init_stats(&c2c_he->cstats.lcl_hitm);
 	init_stats(&c2c_he->cstats.rmt_hitm);
 	init_stats(&c2c_he->cstats.load);

 	return &c2c_he->he;
+
+free_nodeset:
+	free(c2c_he->nodeset);
+free_cpuset:
+	free(c2c_he->cpuset);
+free_c2c_he:
+	free(c2c_he);
+	return NULL;
 }

 static void c2c_he_free(void *he)
-- 
2.7.4