From 4466bab1e2efb616ee78bafafe3544ea3c0e2d5e Mon Sep 17 00:00:00 2001
From: Yonezawa-T2 <Yonezawa-T2@mail.dnp.co.jp>
Date: Thu, 10 Dec 2015 11:49:32 +0900
Subject: [PATCH] gnrc_ndp_internal: add missing unlock when the pktbuf is full

---
 sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c b/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
index d9f51cbc7fb86..c89b52628789a 100644
--- a/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
+++ b/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
@@ -469,6 +469,7 @@ void gnrc_ndp_internal_send_rtr_adv(kernel_pid_t iface, ipv6_addr_t *src, ipv6_a
                     else {
                         DEBUG("ndp rtr: error allocating PIO\n");
                         gnrc_pktbuf_release(pkt);
+                        mutex_unlock(&ipv6_iface->mutex);
                         return;
                     }
                 }