Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French:
"Small set of misc cifs/smb3 fixes"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
[CIFS] fix mount failure with broken pathnames when smb3 mount with mapchars option
cifs: revalidate mapping prior to satisfying read_iter request with cache=loose
fs/cifs: fix regression in cifs_create_mf_symlink()

fs/cifs/cifs_unicode.c

···
 cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
 		 const struct nls_table *cp, int mapChars)
 {
-	int i, j, charlen;
+	int i, charlen;
+	int j = 0;
 	char src_char;
 	__le16 dst_char;
 	wchar_t tmp;
···
 	if (!mapChars)
 		return cifs_strtoUTF16(target, source, PATH_MAX, cp);
 
-	for (i = 0, j = 0; i < srclen; j++) {
+	for (i = 0; i < srclen; j++) {
 		src_char = source[i];
 		charlen = 1;
 		switch (src_char) {
 		case 0:
-			put_unaligned(0, &target[j]);
 			goto ctoUTF16_out;
 		case ':':
 			dst_char = cpu_to_le16(UNI_COLON);
···
 	}
 
 ctoUTF16_out:
+	put_unaligned(0, &target[j]); /* Null terminate target unicode string */
 	return j;
 }
 

fs/cifs/cifsfs.c

···
 	goto out;
 }
 
+static ssize_t
+cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+	ssize_t rc;
+	struct inode *inode = file_inode(iocb->ki_filp);
+
+	rc = cifs_revalidate_mapping(inode);
+	if (rc)
+		return rc;
+
+	return generic_file_read_iter(iocb, iter);
+}
+
 static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
 	struct inode *inode = file_inode(iocb->ki_filp);
···
 const struct file_operations cifs_file_ops = {
 	.read = new_sync_read,
 	.write = new_sync_write,
-	.read_iter = generic_file_read_iter,
+	.read_iter = cifs_loose_read_iter,
 	.write_iter = cifs_file_write_iter,
 	.open = cifs_open,
 	.release = cifs_close,
···
 const struct file_operations cifs_file_nobrl_ops = {
 	.read = new_sync_read,
 	.write = new_sync_write,
-	.read_iter = generic_file_read_iter,
+	.read_iter = cifs_loose_read_iter,
 	.write_iter = cifs_file_write_iter,
 	.open = cifs_open,
 	.release = cifs_close,

fs/cifs/link.c

···
 	oparms.cifs_sb = cifs_sb;
 	oparms.desired_access = GENERIC_WRITE;
 	oparms.create_options = create_options;
-	oparms.disposition = FILE_OPEN;
+	oparms.disposition = FILE_CREATE;
 	oparms.path = path;
 	oparms.fid = &fid;
 	oparms.reconnect = false;