From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Mon, 23 Nov 2015 18:59:43 +0000 (-0500)
Subject: nss-mymachines: do not allow overlong machine names
X-Git-Tag: v229~284^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F2006%2Fhead;p=thirdparty%2Fsystemd.git

nss-mymachines: do not allow overlong machine names

https://github.com/systemd/systemd/issues/2002
---

diff --git a/src/nss-mymachines/nss-mymachines.c b/src/nss-mymachines/nss-mymachines.c
index 969fa9619e1..c98a959b3b6 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;