From: Ralf Habacker <ralf.habacker@freenet.de>
Date: Mon, 24 Jun 2019 07:25:48 +0000 (+0200)
Subject: winbind: fix crash in fill_domain_username_talloc() if specified username is NULL
X-Git-Tag: ldb-2.0.5~31
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1b39c563546aed677d0ac99b9fb8b44a5b48c1e4;p=thirdparty%2Fsamba.git

winbind: fix crash in fill_domain_username_talloc() if specified username is NULL

Signed-off-by: Ralf Habacker <ralf.habacker@freenet.de>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Jul  3 19:24:52 UTC 2019 on sn-devel-184
---

diff --git a/source3/winbindd/winbindd_util.c b/source3/winbindd/winbindd_util.c
index b79f90fb0ce..cc4c3f7391a 100644
--- a/source3/winbindd/winbindd_util.c
+++ b/source3/winbindd/winbindd_util.c
@@ -1693,6 +1693,10 @@ char *fill_domain_username_talloc(TALLOC_CTX *mem_ctx,
 		can_assume = false;
 	}
 
+	if (user == NULL) {
+		return NULL;
+	}
+
 	tmp_user = talloc_strdup(mem_ctx, user);
 	if (!strlower_m(tmp_user)) {
 		TALLOC_FREE(tmp_user);