sys/net/rpl: fix possible NULL dereference

fixes #15006
RIOT-OS · May 17, 2023 · 273f92a · 273f92a
1 parent 19ce68d
commit 273f92a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c b/sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c
@@ -1231,7 +1231,7 @@ void gnrc_rpl_recv_DAO_ACK(gnrc_rpl_dao_ack_t *dao_ack, kernel_pid_t iface, ipv6
 #endif
 
     if (!IS_ACTIVE(CONFIG_GNRC_RPL_WITHOUT_VALIDATION)) {
-        if (!gnrc_rpl_validation_DAO_ACK(dao_ack, len, dst)) {
+        if (!dst || !gnrc_rpl_validation_DAO_ACK(dao_ack, len, dst)) {
             return;
         }
     }