diff --git a/fs/file.c b/fs/file.c
index 578864368f6dc3ad67c3f941c6d67c5cbaf74727..cdee1ff8cf42da21213d520ad2b61143189a6747 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -1208,6 +1208,7 @@ __releases(&files->file_lock)
 	 * tables and this condition does not arise without those.
 	 */
 	fdt = files_fdtable(files);
+	fd = array_index_nospec(fd, fdt->max_fds);
 	tofree = fdt->fd[fd];
 	if (!tofree && fd_is_open(fd, fdt))
 		goto Ebusy;