diff --git a/debian/binary-custom.d/xen/src/net/core/sock.c b/debian/binary-custom.d/xen/src/net/core/sock.c
index b0e5208..a39b6aa 100644
--- a/debian/binary-custom.d/xen/src/net/core/sock.c
+++ b/debian/binary-custom.d/xen/src/net/core/sock.c
@@ -1233,6 +1233,11 @@ static struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
 	gfp_t gfp_mask;
 	long timeo;
 	int err;
+	int npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+
+	err = -EMSGSIZE;
+	if (npages > MAX_SKB_FRAGS)
+		goto failure;
 
 	gfp_mask = sk->sk_allocation;
 	if (gfp_mask & __GFP_WAIT)
@@ -1251,14 +1256,12 @@ static struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
 		if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
 			skb = alloc_skb(header_len, gfp_mask);
 			if (skb) {
-				int npages;
 				int i;
 
 				/* No pages, we're done... */
 				if (!data_len)
 					break;
 
-				npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
 				skb->truesize += data_len;
 				skb_shinfo(skb)->nr_frags = npages;
 				for (i = 0; i < npages; i++) {
diff --git a/net/core/sock.c b/net/core/sock.c
index b0e5208..a39b6aa 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1233,6 +1233,11 @@ static struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
 	gfp_t gfp_mask;
 	long timeo;
 	int err;
+	int npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+
+	err = -EMSGSIZE;
+	if (npages > MAX_SKB_FRAGS)
+		goto failure;
 
 	gfp_mask = sk->sk_allocation;
 	if (gfp_mask & __GFP_WAIT)
@@ -1251,14 +1256,12 @@ static struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
 		if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
 			skb = alloc_skb(header_len, gfp_mask);
 			if (skb) {
-				int npages;
 				int i;
 
 				/* No pages, we're done... */
 				if (!data_len)
 					break;
 
-				npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
 				skb->truesize += data_len;
 				skb_shinfo(skb)->nr_frags = npages;
 				for (i = 0; i < npages; i++) {