libtraceevent: Fix memory leakage in copy_filter_type

It is necessary to free the memory that we have allocated when error occurs.

Fixes: ef3072cd1d5c ("tools lib traceevent: Get rid of die in add_filter_type()")
Signed-off-by: Hewenliang <hewenliang4@huawei.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Link: http://lore.kernel.org/lkml/20191119014415.57210-1-hewenliang4@huawei.com
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index 552592d..f3cbf86 100644 (file)
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1473,8 +1473,10 @@ static int copy_filter_type(struct tep_event_filter *filter,
        if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) {
                /* Add trivial event */
                arg = allocate_arg();
-               if (arg == NULL)
+               if (arg == NULL) {
+                       free(str);
                        return -1;
+               }
 
                arg->type = TEP_FILTER_ARG_BOOLEAN;
                if (strcmp(str, "TRUE") == 0)
@@ -1483,8 +1485,11 @@ static int copy_filter_type(struct tep_event_filter *filter,
                        arg->boolean.value = 0;
 
                filter_type = add_filter_type(filter, event->id);
-               if (filter_type == NULL)
+               if (filter_type == NULL) {
+                       free(str);
+                       free_arg(arg);
                        return -1;
+               }
 
                filter_type->filter = arg;