[CIFS] Avoid extra large buffer allocation (and memcpy) in cifs_readpages

Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index ac5a72a..812c6bb 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -299,7 +299,7 @@
 	struct cifsSesInfo * ses;
 	char *temp = (char *) buffer;
 
-	memset(temp,0,MAX_CIFS_HDR_SIZE);
+	memset(temp,0,256); /* bigger than MAX_CIFS_HDR_SIZE */
 
 	buffer->smb_buf_length =
 	    (2 * word_count) + sizeof (struct smb_hdr) -