[BUGFIX][PATCH v8 1/5] perf config: Handle the error about NULL at perf_config_set__delete()

From: Taeung Song <treeze.taeung@gmail.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: linux-kernel@vger.kernel.org, Jiri Olsa <jolsa@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Wang Nan <wangnan0@huawei.com>,
	Taeung Song <treeze.taeung@gmail.com>,
	Jiri Olsa <jolsa@redhat.com>
Subject: [BUGFIX][PATCH v8 1/5] perf config: Handle the error about NULL at perf_config_set__delete()
Date: Wed,  8 Jun 2016 21:36:49 +0900	[thread overview]
Message-ID: <1465389413-8936-2-git-send-email-treeze.taeung@gmail.com> (raw)
In-Reply-To: <1465389413-8936-1-git-send-email-treeze.taeung@gmail.com>

perf_config_set__delete() purge and free the config set
that contains all config key-value pairs.
But if the config set (i.e. 'set' variable at the function)
is NULL, this is wrong so handle it.

Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/util/config.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 8749eca..31e09a4 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -742,6 +742,9 @@ static void perf_config_set__purge(struct perf_config_set *set)
 
 void perf_config_set__delete(struct perf_config_set *set)
 {
+	if (set == NULL)
+		return;
+
 	perf_config_set__purge(set);
 	free(set);
 }
-- 
2.5.0
