diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 38cf73a5673144ed40cab33d07501a972c5299be..ad759f1c377734bf252a25422e136c275f132312 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1055,6 +1055,9 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
 	bp->pad = 0;
 	bp->protocol = protocol;
 	bp->len = htons(tcplen);
+
+	sg_init_table(sg, 4);
+
 	sg_set_buf(&sg[block++], bp, sizeof(*bp));
 	nbytes += sizeof(*bp);
 
@@ -1080,6 +1083,8 @@ static int tcp_v4_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
 	sg_set_buf(&sg[block++], key->key, key->keylen);
 	nbytes += key->keylen;
 
+	sg_mark_end(sg, block);
+
 	/* Now store the Hash into the packet */
 	err = crypto_hash_init(desc);
 	if (err)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 737b755342bd8ca5b892fdac71346600e3462296..32dc329762e95771b39428163a237cc3893046a4 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -757,6 +757,8 @@ static int tcp_v6_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
 	bp->len = htonl(tcplen);
 	bp->protocol = htonl(protocol);
 
+	sg_init_table(sg, 4);
+
 	sg_set_buf(&sg[block++], bp, sizeof(*bp));
 	nbytes += sizeof(*bp);
 
@@ -778,6 +780,8 @@ static int tcp_v6_do_calc_md5_hash(char *md5_hash, struct tcp_md5sig_key *key,
 	sg_set_buf(&sg[block++], key->key, key->keylen);
 	nbytes += key->keylen;
 
+	sg_mark_end(sg, block);
+
 	/* Now store the hash into the packet */
 	err = crypto_hash_init(desc);
 	if (err) {