filter_kubernetes: fix parser annotation leak

Free previous parser SDS when annotations override defaults.

Signed-off-by: Yu Yi <[email protected]>

Author: erain

plugins/filter_kubernetes/kube_property.c

@@ -84,12 +84,18 @@ static int prop_set_parser(struct flb_kube *ctx, struct flb_kube_meta *meta,
          stream == FLB_KUBE_PROP_STREAM_STDOUT) &&
         (is_container_specific == FLB_TRUE ||
          props->stdout_parser == FLB_KUBE_PROP_UNDEF)) {
+        if (props->stdout_parser) {
+            flb_sds_destroy(props->stdout_parser);
+        }
         props->stdout_parser = flb_sds_create(tmp);
     }
     if ((stream == FLB_KUBE_PROP_NO_STREAM ||
          stream == FLB_KUBE_PROP_STREAM_STDERR) &&
         (is_container_specific == FLB_TRUE ||
          props->stderr_parser == FLB_KUBE_PROP_UNDEF)) {
+        if (props->stderr_parser) {
+            flb_sds_destroy(props->stderr_parser);
+        }
         props->stderr_parser = flb_sds_create(tmp);
     }