s4-heimdal: fixed a use-after-free heimdal bug

This caused samba4kinit to segfault on some systems

diff --git a/source4/heimdal/lib/krb5/init_creds_pw.c b/source4/heimdal/lib/krb5/init_creds_pw.c
index 5363d533e732bd184273bdc0d1e36bd4350531c7..b615f5340a3931149dc7452c11afdb865b0a3fa6 100644 (file)
--- a/source4/heimdal/lib/krb5/init_creds_pw.c
+++ b/source4/heimdal/lib/krb5/init_creds_pw.c
@@ -1463,6 +1463,7 @@ krb5_init_creds_set_keytab(krb5_context context,
            /* remove old list of etype */
            if (etypes)
                free(etypes);
+           etypes = NULL;
            netypes = 0;
            kvno = entry.vno;
        } else if (entry.vno != kvno)