From: Andreas Schneider <asn@samba.org>
Date: Tue, 23 Nov 2021 14:48:57 +0000 (+0100)
Subject: s3:winbind: Fix possible NULL pointer dereference
X-Git-Tag: tdb-1.4.6~558
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbf312f02bc86f9325fb89f6f5441bc61fd3974f;p=thirdparty%2Fsamba.git

s3:winbind: Fix possible NULL pointer dereference

BUG: https://bugzilla.redhat.com/show_bug.cgi?id=2019888

Signed-off-by: Andreas Schneider <asn@samba.org>
Rewiewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Nov 29 19:40:50 UTC 2021 on sn-devel-184
---

diff --git a/source3/winbindd/winbindd_util.c b/source3/winbindd/winbindd_util.c
index a8c510fafc6..175e05ae3ad 100644
--- a/source3/winbindd/winbindd_util.c
+++ b/source3/winbindd/winbindd_util.c
@@ -1784,6 +1784,9 @@ char *fill_domain_username_talloc(TALLOC_CTX *mem_ctx,
 	}
 
 	tmp_user = talloc_strdup(mem_ctx, user);
+	if (tmp_user == NULL) {
+		return NULL;
+	}
 	if (!strlower_m(tmp_user)) {
 		TALLOC_FREE(tmp_user);
 		return NULL;