systemd/0001-nss-mymachines-do-not-allow-overlong-machine-names.patch

From cb31827d62066a04b02111df3052949fda4b6888 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Mon, 23 Nov 2015 13:59:43 -0500
Subject: [PATCH] nss-mymachines: do not allow overlong machine names

https://github.com/systemd/systemd/issues/2002
---
 src/nss-mymachines/nss-mymachines.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/nss-mymachines/nss-mymachines.c b/src/nss-mymachines/nss-mymachines.c
index 969fa96..c98a959 100644
--- a/src/nss-mymachines/nss-mymachines.c
+++ b/src/nss-mymachines/nss-mymachines.c
@@ -416,6 +416,9 @@ enum nss_status _nss_mymachines_getpwnam_r(
         if (!e || e == p)
                 goto not_found;
 
+        if (e - p > HOST_NAME_MAX - 1) /* -1 for the last dash */
+                goto not_found;
+
         r = parse_uid(e + 1, &uid);
         if (r < 0)
                 goto not_found;
@@ -573,6 +576,9 @@ enum nss_status _nss_mymachines_getgrnam_r(
         if (!e || e == p)
                 goto not_found;
 
+        if (e - p > HOST_NAME_MAX - 1)  /* -1 for the last dash */
+                goto not_found;
+
         r = parse_gid(e + 1, &gid);
         if (r < 0)
                 goto not_found;
-- 
2.1.4