Handle big endianness in NTLM (ntlmv2) authentication

commit fdf96a907c1fbb93c633e2b7ede3b8df26d6a4c0 upstream.

This is RH bug 970891
Uppercasing of username during calculation of ntlmv2 hash fails
because UniStrupr function does not handle big endian wchars.

Also fix a comment in the same code to reflect its correct usage.

[To make it easier for stable (rather than require 2nd patch) fixed
this patch of Shirish's to remove endian warning generated
by sparse -- steve f.]

Reported-by: steve <sanpatr1@in.ibm.com>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 71436d1fca13..f59d0d58258e 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -414,7 +414,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
         int rc = 0;
         int len;
         char nt_hash[CIFS_NTHASH_SIZE];
-        wchar_t *user;
+        __le16 *user;
         wchar_t *domain;
         wchar_t *server;
 
@@ -439,7 +439,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
                 return rc;
         }
 
-        /* convert ses->user_name to unicode and uppercase */
+        /* convert ses->user_name to unicode */
         len = ses->user_name ? strlen(ses->user_name) : 0;
         user = kmalloc(2 + (len * 2), GFP_KERNEL);
         if (user == NULL) {
@@ -448,7 +448,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
         }
 
         if (len) {
-                len = cifs_strtoUTF16((__le16 *)user, ses->user_name, len, nls_cp);
+                len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
                 UniStrupr(user);
         } else {
                 memset(user, '\0', 2);