[ 047/171 ] target/iscsi: Fix mutual CHAP auth on big-endian arches

[Steven Rostedt]

3.6.11.2 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Andy Grover <agrover@xxxxxxxxxx>

[ Upstream commit 7ac9ad11b2a5cf77a92b58ee6b672ad2fa155eb1 ]

See https://bugzilla.redhat.com/show_bug.cgi?id=916290

Used a temp var since we take its address in sg_init_one.

Signed-off-by: Andy Grover <agrover@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 drivers/target/iscsi/iscsi_target_auth.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/target/iscsi/iscsi_target_auth.c b/drivers/target/iscsi/iscsi_target_auth.c
index db0cf7c..a0fc7b9 100644
--- a/drivers/target/iscsi/iscsi_target_auth.c
+++ b/drivers/target/iscsi/iscsi_target_auth.c
@@ -166,6 +166,7 @@ static int chap_server_compute_md5(
 {
 	char *endptr;
 	unsigned long id;
+	unsigned char id_as_uchar;
 	unsigned char digest[MD5_SIGNATURE_SIZE];
 	unsigned char type, response[MD5_SIGNATURE_SIZE * 2 + 2];
 	unsigned char identifier[10], *challenge = NULL;
@@ -355,7 +356,9 @@ static int chap_server_compute_md5(
 		goto out;
 	}
 
-	sg_init_one(&sg, &id, 1);
+	/* To handle both endiannesses */
+	id_as_uchar = id;
+	sg_init_one(&sg, &id_as_uchar, 1);
 	ret = crypto_hash_update(&desc, &sg, 1);
 	if (ret < 0) {
 		pr_err("crypto_hash_update() failed for id\n");
-- 
1.7.10.4


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