Check fdopen return value, from Christian Menges.

diff --git a/usr.bin/tmux/popup.c b/usr.bin/tmux/popup.c
index cafbc16..b172f40 100644 (file)
--- a/usr.bin/tmux/popup.c
+++ b/usr.bin/tmux/popup.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: popup.c,v 1.49 2023/06/08 11:17:28 nicm Exp $ */
+/* $OpenBSD: popup.c,v 1.50 2023/06/21 06:28:18 nicm Exp $ */
 
 /*
  * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -788,6 +788,8 @@ popup_editor(struct client *c, const char *buf, size_t len,
        if (fd == -1)
                return (-1);
        f = fdopen(fd, "w");
+       if (f == NULL)
+               return (-1);
        if (fwrite(buf, len, 1, f) != 1) {
                fclose(f);
                return (-1);