2 files changed, 10 insertions, 4 deletions
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
index faecf64..1b09eaa 100644
--- a/net/ieee802154/dgram.c
+++ b/net/ieee802154/dgram.c
@@ -209,6 +209,7 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
 	unsigned mtu;
 	struct sk_buff *skb;
 	struct dgram_sock *ro = dgram_sk(sk);
+	int hlen, tlen;
 	int err;
 
 	if (msg->msg_flags & MSG_OOB) {
@@ -229,13 +230,15 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
 	mtu = dev->mtu;
 	pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
 
-	skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
+	hlen = LL_RESERVED_SPACE(dev);
+	tlen = dev->needed_tailroom;
+	skb = sock_alloc_send_skb(sk, hlen + tlen + size,
 			msg->msg_flags & MSG_DONTWAIT,
 			&err);
 	if (!skb)
 		goto out_dev;
 
-	skb_reserve(skb, LL_RESERVED_SPACE(dev));
+	skb_reserve(skb, hlen);
 
 	skb_reset_network_header(skb);
 
diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c
index 10970ca..f96bae8 100644
--- a/net/ieee802154/raw.c
+++ b/net/ieee802154/raw.c
@@ -108,6 +108,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	struct net_device *dev;
 	unsigned mtu;
 	struct sk_buff *skb;
+	int hlen, tlen;
 	int err;
 
 	if (msg->msg_flags & MSG_OOB) {
@@ -137,12 +138,14 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		goto out_dev;
 	}
 
-	skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
+	hlen = LL_RESERVED_SPACE(dev);
+	tlen = dev->needed_tailroom;
+	skb = sock_alloc_send_skb(sk, hlen + tlen + size,
 			msg->msg_flags & MSG_DONTWAIT, &err);
 	if (!skb)
 		goto out_dev;
 
-	skb_reserve(skb, LL_RESERVED_SPACE(dev));
+	skb_reserve(skb, hlen);
 
 	skb_reset_mac_header(skb);
 	skb_reset_network_header(skb);