From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Sat, 27 May 2017 19:40:58 +0000 (-0400)
Subject: Fix: return error on empty list in get_unary_unsigned
X-Git-Tag: v2.0.0-pre1~144
X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=commitdiff_plain;h=d82c602ed5c07e996269443686ae671537955cc5

Fix: return error on empty list in get_unary_unsigned

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/plugins/ctf/common/metadata/visitor-generate-ir.c b/plugins/ctf/common/metadata/visitor-generate-ir.c
index badbf995..fb0f1df1 100644
--- a/plugins/ctf/common/metadata/visitor-generate-ir.c
+++ b/plugins/ctf/common/metadata/visitor-generate-ir.c
@@ -855,6 +855,11 @@ int get_unary_unsigned(struct bt_list_head *head, uint64_t *value)
 	int ret = 0;
 	struct ctf_node *node;
 
+	if (bt_list_empty(head)) {
+		ret = -1;
+		goto end;
+	}
+
 	bt_list_for_each_entry(node, head, siblings) {
 		int uexpr_type = node->u.unary_expression.type;
 		int uexpr_link = node->u.unary_expression.link;