From 7e8fba78890a6a52dc45dd49ec9f42480484b763 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Thu, 28 Dec 2017 05:33:59 +0000
Subject: [PATCH] Close slave on fork error to prevent pty fd leak.

CID: 978209
---
 lib/libutil/pty.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/libutil/pty.c b/lib/libutil/pty.c
index 1ef445a7b3b..8faf9154538 100644
--- a/lib/libutil/pty.c
+++ b/lib/libutil/pty.c
@@ -101,12 +101,13 @@ forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp)
 		return (-1);
 	switch (pid = fork()) {
 	case -1:
+		(void)close(slave);
 		return (-1);
 	case 0:
 		/*
 		 * child
 		 */
-		(void) close(master);
+		(void)close(master);
 		login_tty(slave);
 		return (0);
 	}