[ 3.5.y.z extended stable ] Patch "target/iscsi: Fix mutual CHAP auth on big-endian arches" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Mon Mar 25 18:02:30 UTC 2013

This is a note to let you know that I have just added a patch titled

    target/iscsi: Fix mutual CHAP auth on big-endian arches

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From b80991150dcd2fa6d90b8952388e0de254c44de2 Mon Sep 17 00:00:00 2001
From: Andy Grover <agrover at redhat.com>
Date: Mon, 4 Mar 2013 13:52:09 -0800
Subject: [PATCH] target/iscsi: Fix mutual CHAP auth on big-endian arches

commit 7ac9ad11b2a5cf77a92b58ee6b672ad2fa155eb1 upstream.

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 at redhat.com>
Signed-off-by: Nicholas Bellinger <nab at linux-iscsi.org>
Luis Henriques <luis.henriques at canonical.com>
 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");

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