parse-events: Fix error path from process_value() failing

The parent arg in process_value() may not be changed on error.
If we pass in an argument, then it needs to be initialized to NULL
if we plan on freeing it on failure.

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/parse-filter.c b/parse-filter.c
index a973a72..4efce04 100644
--- a/parse-filter.c
+++ b/parse-filter.c
@@ -615,7 +615,7 @@ process_cmp(struct event_format *event, enum filter_cmp_type op_type,
             char **tok, char **error_str)
 {
         struct filter_arg *arg;
-        struct filter_arg *rarg;
+        struct filter_arg *rarg = NULL;
         enum event_type orig_type;
         enum event_type type;
         int ret;
@@ -744,7 +744,7 @@ process_exp(struct event_format *event, enum filter_exp_type etype,
             struct filter_arg *larg, struct filter_arg **parg,
             char **tok, char **error_str)
 {
-        struct filter_arg *rarg;
+        struct filter_arg *rarg = NULL;
         struct filter_arg *arg;
         enum event_type orig_type;
         enum event_type type;