From b727d4309c2932fca130c9a44c858cdaaa96dabd Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@courtesan.com>
Date: Thu, 5 Feb 2015 11:17:24 -0700
Subject: [PATCH] Handle sudo_get_grlist() returning NULL which can happen if
 getgrouplist() fails even after allocating the appropriate amount of memory. 
 From Stephane Chazelas

---
 plugins/sudoers/set_perms.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/plugins/sudoers/set_perms.c b/plugins/sudoers/set_perms.c
index 76234af35..6b073c7e6 100644
--- a/plugins/sudoers/set_perms.c
+++ b/plugins/sudoers/set_perms.c
@@ -1589,9 +1589,11 @@ runas_setgroups(void)
 #ifdef HAVE_SETAUTHDB
     aix_restoreauthdb();
 #endif
-    if (sudo_setgroups(grlist->ngids, grlist->gids) < 0) {
-	sudo_grlist_delref(grlist);
-	grlist = NULL;
+    if (grlist != NULL) {
+	if (sudo_setgroups(grlist->ngids, grlist->gids) < 0) {
+	    sudo_grlist_delref(grlist);
+	    grlist = NULL;
+	}
     }
     debug_return_ptr(grlist);
 }
-- 
2.50.1