linux-kernel - [PATCH 13/22] lib/traceevent: Fix freeing arg on process_dynamic

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Message-Id: <1337740619-27925-14-git-send-email-namhyung.kim@lge.com>
Date:	Wed, 23 May 2012 11:36:50 +0900
From:	Namhyung Kim <namhyung.kim@....com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Borislav Petkov <bp@...en8.de>, David Ahern <dsahern@...il.com>
Subject: [PATCH 13/22] lib/traceevent: Fix freeing arg on process_dynamic_array()

The @arg paremeter should not be freed inside of process_XXX(),
because it'd be freed from the caller of process_arg(). We can
free it only after it was reused for local usage.

Link: http://lkml.kernel.org/r/1335157118-14658-3-git-send-email-namhyung.kim@lge.com

Signed-off-by: Namhyung Kim <namhyung.kim@....com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David Ahern <dsahern@...il.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 tools/lib/traceevent/event-parse.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 865d0f268274..eb9babbf8e55 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2342,17 +2342,18 @@ process_dynamic_array(struct event_format *event, struct print_arg *arg, char **
 	arg = alloc_arg();
 	type = process_arg(event, arg, &token);
 	if (type == EVENT_ERROR)
-		goto out_free;
+		goto out_free_arg;
 
 	if (!test_type_token(type, token, EVENT_OP, "]"))
-		goto out_free;
+		goto out_free_arg;
 
 	free_token(token);
 	type = read_token_item(tok);
 	return type;
 
+ out_free_arg:
+	free_arg(arg);
  out_free:
-	free(arg);
 	free_token(token);
 	*tok = NULL;
 	return EVENT_ERROR;
-- 
1.7.10.1

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