smb: client: get rid of kstrdup() when parsing pass mount option

Steal string reference from @param->string rather than duplicating it.

Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: pcacjr

fs/smb/client/fs_context.c

@@ -1482,12 +1482,7 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 		ctx->password = NULL;
 		if (strlen(param->string) == 0)
 			break;
-
-		ctx->password = kstrdup(param->string, GFP_KERNEL);
-		if (ctx->password == NULL) {
-			cifs_errorf(fc, "OOM when copying password string\n");
-			goto cifs_parse_mount_err;
-		}
+		ctx->password = no_free_ptr(param->string);
 		break;
 	case Opt_pass2:
 		kfree_sensitive(ctx->password2);