cifs: fix buffer format byte on NT Rename/hardlink

Discovered at Connnectathon 2009...

The buffer format byte and the pad are transposed in NT_RENAME calls
(which are used to set hardlinks). Most servers seem to ignore this
fact, but NetApp filers throw back an error due to this problem. This
patch fixes it.

CC: Stable <stable@kernel.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 4c344fe7a152..bc09c998631f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -2377,8 +2377,10 @@ winCreateHardLinkRetry:
                                      PATH_MAX, nls_codepage, remap);
                 name_len++;     /* trailing null */
                 name_len *= 2;
-                pSMB->OldFileName[name_len] = 0;        /* pad */
-                pSMB->OldFileName[name_len + 1] = 0x04;
+
+                /* protocol specifies ASCII buffer format (0x04) for unicode */
+                pSMB->OldFileName[name_len] = 0x04;
+                pSMB->OldFileName[name_len + 1] = 0x00; /* pad */
                 name_len2 =
                     cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
                                      toName, PATH_MAX, nls_codepage, remap);