diff --git a/lib/ldb/common/ldb_dn.c b/lib/ldb/common/ldb_dn.c
index 001fcad621f..cce5ad5b2ff 100644
--- a/lib/ldb/common/ldb_dn.c
+++ b/lib/ldb/common/ldb_dn.c
@@ -570,6 +570,7 @@ static bool ldb_dn_explode(struct ldb_dn *dn)
 					/* trim back */
 					d -= (p - t);
 					l -= (p - t);
+					t = NULL;
 				}
 
 				in_attr = true;
diff --git a/selftest/knownfail.d/python-segfaults b/selftest/knownfail.d/python-segfaults
index 524f7dd013b..1be0566dcb1 100644
--- a/selftest/knownfail.d/python-segfaults
+++ b/selftest/knownfail.d/python-segfaults
@@ -1,2 +1 @@
 samba.tests.segfault.samba.tests.segfault.SegfaultTests.test_net_replicate_init__3
-samba.tests.segfault.samba.tests.segfault.SegfaultTests.test_ldb_dn_explode_crash