consistently use smb_buf_length as be32 for cifs (try 3)

       There is one big endian field in the cifs protocol, the RFC1001
       length, which cifs code (unlike in the smb2 code) had been handling as
       u32 until the last possible moment, when it was converted to be32 (its
       native form) before sending on the wire.   To remove the last sparse
       endian warning, and to make this consistent with the smb2
       implementation  (which always treats the fields in their
       native size and endianness), convert all uses of smb_buf_length to
       be32.

       This version incorporates Christoph's comment about
       using be32_add_cpu, and fixes a typo in the second
       version of the patch.

Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index b6ff84af81a..1daadade4d3 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -621,7 +621,7 @@ ssetup_ntlmssp_authenticate:
 	and rest of bcc area. This allows us to avoid
 	a large buffer 17K allocation */
 	iov[0].iov_base = (char *)pSMB;
-	iov[0].iov_len = smb_buf->smb_buf_length + 4;
+	iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
 
 	/* setting this here allows the code at the end of the function
 	   to free the request buffer if there's an error */
@@ -859,7 +859,8 @@ ssetup_ntlmssp_authenticate:
 	iov[2].iov_len = (long) bcc_ptr - (long) str_area;
 
 	count = iov[1].iov_len + iov[2].iov_len;
-	smb_buf->smb_buf_length += count;
+	smb_buf->smb_buf_length =
+		cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
 
 	put_bcc_le(count, smb_buf);