linux-kernel - [PATCH AUTOSEL 4.19 08/56] tools lib traceevent: Fix memory leakage in filter

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Date:   Fri, 24 Jan 2020 09:19:24 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Hewenliang <hewenliang4@...wei.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Feilong Lin <linfeilong@...wei.com>,
        Tzvetomir Stoyanov <tstoyanov@...are.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.19 08/56] tools lib traceevent: Fix memory leakage in filter_event

From: Hewenliang <hewenliang4@...wei.com>

[ Upstream commit f84ae29a6169318f9c929720c49d96323d2bbab9 ]

It is necessary to call free_arg(arg) when add_filter_type() returns NULL
in filter_event().

Signed-off-by: Hewenliang <hewenliang4@...wei.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Cc: Feilong Lin <linfeilong@...wei.com>
Cc: Tzvetomir Stoyanov <tstoyanov@...are.com>
Link: http://lore.kernel.org/lkml/20191209063549.59941-1-hewenliang4@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/lib/traceevent/parse-filter.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index 2700f1f17876e..27248a0aad84a 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1227,8 +1227,10 @@ filter_event(struct event_filter *filter, struct event_format *event,
 	}
 
 	filter_type = add_filter_type(filter, event->id);
-	if (filter_type == NULL)
+	if (filter_type == NULL) {
+		free_arg(arg);
 		return TEP_ERRNO__MEM_ALLOC_FAILED;
+	}
 
 	if (filter_type->filter)
 		free_arg(filter_type->filter);
-- 
2.20.1