From e3165b49aca25d125e8973e394e70071fd436f01 Mon Sep 17 00:00:00 2001
From: Oleg Hahm <oleg@hobbykeller.org>
Date: Wed, 22 Jul 2015 14:38:04 +0200
Subject: [PATCH] gnrc: avoid potential null pointer dereferencing
---
sys/net/link_layer/ng_netdev_eth/ng_netdev_eth.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/sys/net/link_layer/ng_netdev_eth/ng_netdev_eth.c b/sys/net/link_layer/ng_netdev_eth/ng_netdev_eth.c
index db08d7e68e..889f0111b9 100644
--- a/sys/net/link_layer/ng_netdev_eth/ng_netdev_eth.c
+++ b/sys/net/link_layer/ng_netdev_eth/ng_netdev_eth.c
@@ -364,7 +364,9 @@ static inline void _addr_set_multicast(uint8_t *dst, ng_pktsnip_t *payload)
case NG_NETTYPE_IPV6:
dst[0] = 0x33;
dst[1] = 0x33;
- memcpy(dst + 2, ((uint8_t *)payload->data) + _IPV6_DST_OFFSET, 4);
+ if ((payload != NULL) && (payload->data != NULL)) {
+ memcpy(dst + 2, ((uint8_t *)payload->data) + _IPV6_DST_OFFSET, 4);
+ }
/* TODO change to proper types when ng_ipv6_hdr_t got merged */
break;
#endif
--
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