linux-kernel - [BUGFIX][PATCH v7 1/7] perf config: If collect_config() is failed, finally free a config set after it is done

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Message-Id: <1465291577-20973-2-git-send-email-treeze.taeung@gmail.com>
Date:	Tue,  7 Jun 2016 18:26:11 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Taeung Song <treeze.taeung@...il.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: [BUGFIX][PATCH v7 1/7] perf config: If collect_config() is failed, finally free a config set after it is done

Because of die() at perf_parse_file() a config set was freed
in collect_config(), if failed.
But it is natural to free a config set after collect_config() is done
when some problems happened.

So, in case of failure, lastly free a config set at perf_config_set__new()
instead of freeing the config set in collect_config().

Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 tools/perf/util/config.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index c73f1c4..e086f59 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -643,7 +643,6 @@ static int collect_config(const char *var, const char *value,
 
 out_free:
 	free(key);
-	perf_config_set__delete(set);
 	return -1;
 }
 
@@ -653,7 +652,10 @@ struct perf_config_set *perf_config_set__new(void)
 
 	if (set) {
 		INIT_LIST_HEAD(&set->sections);
-		perf_config(collect_config, set);
+		if (perf_config(collect_config, set) < 0) {
+			perf_config_set__delete(set);
+			set = NULL;
+		}
 	}
 
 	return set;
-- 
2.5.0