[tip: perf/urgent] tools lib traceevent: Fix memory leakage in filter_event

[tip-bot2 for Hewenliang]

The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     f84ae29a6169318f9c929720c49d96323d2bbab9
Gitweb:        https://git.kernel.org/tip/f84ae29a6169318f9c929720c49d96323d2bbab9
Author:        Hewenliang <hewenliang4@xxxxxxxxxx>
AuthorDate:    Mon, 09 Dec 2019 01:35:49 -05:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Fri, 20 Dec 2019 18:47:50 -03:00

tools lib traceevent: Fix memory leakage in filter_event

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

Signed-off-by: Hewenliang <hewenliang4@xxxxxxxxxx>
Reviewed-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Cc: Feilong Lin <linfeilong@xxxxxxxxxx>
Cc: Tzvetomir Stoyanov <tstoyanov@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20191209063549.59941-1-hewenliang4@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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 f3cbf86..20eed71 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1228,8 +1228,10 @@ filter_event(struct tep_event_filter *filter, struct tep_event *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);