X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Ftools%2Flib%2Ftraceevent%2Fparse-filter.c;fp=kernel%2Ftools%2Flib%2Ftraceevent%2Fparse-filter.c;h=88cccea3ca9910314bf8024545c76620051fa263;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=0144b3d1bb77ac63441c77e1bb24e3405cfe3d8f;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/tools/lib/traceevent/parse-filter.c b/kernel/tools/lib/traceevent/parse-filter.c
index 0144b3d1b..88cccea3c 100644
--- a/kernel/tools/lib/traceevent/parse-filter.c
+++ b/kernel/tools/lib/traceevent/parse-filter.c
@@ -1164,11 +1164,11 @@ process_filter(struct event_format *event, struct filter_arg **parg,
 		current_op = current_exp;
 
 	ret = collapse_tree(current_op, parg, error_str);
+	/* collapse_tree() may free current_op, and updates parg accordingly */
+	current_op = NULL;
 	if (ret < 0)
 		goto fail;
 
-	*parg = current_op;
-
 	free(token);
 	return 0;