From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932284AbdCTSE6 (ORCPT ); Mon, 20 Mar 2017 14:04:58 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40968 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756853AbdCTSCi (ORCPT ); Mon, 20 Mar 2017 14:02:38 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Matthias Schiffer , Jiri Benc , "David S. Miller" Subject: [PATCH 4.9 04/93] vxlan: correctly validate VXLAN ID against VXLAN_N_VID Date: Mon, 20 Mar 2017 18:50:39 +0100 Message-Id: <20170320174735.466799307@linuxfoundation.org> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20170320174735.243147498@linuxfoundation.org> References: <20170320174735.243147498@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthias Schiffer [ Upstream commit 4e37d6911f36545b286d15073f6f2222f840e81c ] The incorrect check caused an off-by-one error: the maximum VID 0xffffff was unusable. Fixes: d342894c5d2f ("vxlan: virtual extensible lan") Signed-off-by: Matthias Schiffer Acked-by: Jiri Benc Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/vxlan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2637,7 +2637,7 @@ static int vxlan_validate(struct nlattr if (data[IFLA_VXLAN_ID]) { __u32 id = nla_get_u32(data[IFLA_VXLAN_ID]); - if (id >= VXLAN_VID_MASK) + if (id >= VXLAN_N_VID) return -ERANGE; }