X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=blobdiff_plain;f=src%2Fdhcpv6-ia.c;h=b0a31a2d40445107f16d3f99d48b485e3439290e;hp=3d9fe831908ac58b0178b71a8d080438b2200fe1;hb=1565d76bd6ff2d1064c3d30e947dc70613417853;hpb=d02dc222e61e2464bf850a629030c8a8b9b57ee8

diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index 3d9fe83..b0a31a2 100644
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -900,8 +900,10 @@ size_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
 				a->assigned = reqhint;
 				a->all_class = class_oro;
 				a->classes_cnt = classes_cnt;
-				a->classes = malloc(classes_cnt * sizeof(uint16_t));
-				memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
+				if (classes_cnt) {
+					a->classes = malloc(classes_cnt * sizeof(uint16_t));
+					memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
+				}
 
 				if (first)
 					memcpy(a->key, first->key, sizeof(a->key));