From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 26 Oct 2007 07:41:21 +0000 (-0700)
Subject: [TCP]: Fix scatterlist handling in MD5 signature support.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c7da57a183a255f53caa73b1f688a01b097fa5bc;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[TCP]: Fix scatterlist handling in MD5 signature support.

Use sg_init_table() and sg_mark_end() as needed.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 38cf73a56731..ad759f1c3777 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 737b755342bd..32dc329762e9 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) {