xz: Fix the Capsicum rights on user_abort_pipe.

src/xz/file_io.c

@@ -198,4 +198,8 @@
 			CAP_WRITE, CAP_SEEK)))
 		goto error;
 
+	if (cap_rights_limit(user_abort_pipe[0], cap_rights_init(&rights,
+			CAP_EVENT)))
+		goto error;
+
 	if (cap_rights_limit(user_abort_pipe[1], cap_rights_init(&rights,
@@ -201,5 +205,5 @@
 	if (cap_rights_limit(user_abort_pipe[1], cap_rights_init(&rights,
-			CAP_EVENT, CAP_WRITE)))
+			CAP_WRITE)))
 		goto error;
 
 	if (cap_enter())