linux-kernel - [PATCH V2 06/15] perf tools: fix parse_events_terms() freeing local variable on error path

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Date:	Thu, 27 Jun 2013 10:54:58 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH V2 06/15] perf tools: fix parse_events_terms() freeing local variable on error path

The list_head is on the stack, so just free the rest of the list.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/parse-events.c | 7 ++++++-
 tools/perf/util/parse-events.h | 1 +
 tools/perf/util/pmu.c          | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 995fc25..d9cb055 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1231,12 +1231,17 @@ int parse_events_term__clone(struct parse_events_term **new,
 			term->val.str, term->val.num);
 }
 
-void parse_events__free_terms(struct list_head *terms)
+void parse_events__free_terms_only(struct list_head *terms)
 {
 	struct parse_events_term *term, *h;
 
 	list_for_each_entry_safe(term, h, terms, list)
 		free(term);
+}
+
+void parse_events__free_terms(struct list_head *terms)
+{
+	parse_events__free_terms_only(terms);
 
 	free(terms);
 }
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 8a48593..6cb6f32 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -80,6 +80,7 @@ int parse_events_term__sym_hw(struct parse_events_term **term,
 			      char *config, unsigned idx);
 int parse_events_term__clone(struct parse_events_term **new,
 			     struct parse_events_term *term);
+void parse_events__free_terms_only(struct list_head *terms);
 void parse_events__free_terms(struct list_head *terms);
 int parse_events__modifier_event(struct list_head *list, char *str, bool add);
 int parse_events__modifier_group(struct list_head *list, char *event_mod);
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 4c6f9c4..5dd9e37 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -194,7 +194,7 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias,
 	list_for_each_entry(term, &alias->terms, list) {
 		ret = parse_events_term__clone(&clone, term);
 		if (ret) {
-			parse_events__free_terms(&list);
+			parse_events__free_terms_only(&list);
 			return ret;
 		}
 		list_add_tail(&clone->list, &list);
-- 
1.7.11.7

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