From 605e5bbc41f9c3b1b828ea2cbc2e31f9fce50d81 Mon Sep 17 00:00:00 2001
From: Daniel Eischen <deischen@FreeBSD.org>
Date: Fri, 1 Feb 2013 05:19:49 +0000
Subject: [PATCH] Prevent a null pointer dereference in pw userdel when
 deleting a user whose group != username.

---
 usr.sbin/pw/pw_user.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usr.sbin/pw/pw_user.c b/usr.sbin/pw/pw_user.c
index 38f21cee61a..5f4d7a99252 100644
--- a/usr.sbin/pw/pw_user.c
+++ b/usr.sbin/pw/pw_user.c
@@ -425,7 +425,7 @@ pw_user(struct userconf * cnf, int mode, struct cargs * args)
 			}
 
 			grp = GETGRNAM(a_name->val);
-			if (*grp->gr_mem == NULL)
+			if (grp != NULL && *grp->gr_mem == NULL)
 				delgrent(GETGRNAM(a_name->val));
 			SETGRENT();
 			while ((grp = GETGRENT()) != NULL) {