From 1fd4c4edced482ded1cdf09997bf419c14e6a3b8 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 26 Mar 2019 17:22:18 +0100
Subject: [PATCH] terminal-util: add paranoid overflow check

---
 src/basic/terminal-util.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/basic/terminal-util.c b/src/basic/terminal-util.c
index a1a7899..b692c52 100644
--- a/src/basic/terminal-util.c
+++ b/src/basic/terminal-util.c
@@ -1041,6 +1041,10 @@ int ptsname_malloc(int fd, char **ret) {
                 }
 
                 free(c);
+
+                if (l > SIZE_MAX / 2)
+                        return -ENOMEM;
+
                 l *= 2;
         }
 }
-- 
2.7.4