From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752545AbcFEKvr (ORCPT ); Sun, 5 Jun 2016 06:51:47 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:21746 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752011AbcFEKVu (ORCPT ); Sun, 5 Jun 2016 06:21:50 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ben Hutchings , "David S . Miller" , Willy Tarreau Subject: [PATCH 3.10 125/143] atl2: Disable unimplemented scatter/gather feature Date: Sun, 5 Jun 2016 12:20:28 +0200 Message-Id: <1465122046-9645-126-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1465122046-9645-1-git-send-email-w@1wt.eu> References: <1465122046-9645-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ben Hutchings commit f43bfaeddc79effbf3d0fcb53ca477cca66f3db8 upstream. atl2 includes NETIF_F_SG in hw_features even though it has no support for non-linear skbs. This bug was originally harmless since the driver does not claim to implement checksum offload and that used to be a requirement for SG. Now that SG and checksum offload are independent features, if you explicitly enable SG *and* use one of the rare protocols that can use SG without checkusm offload, this potentially leaks sensitive information (before you notice that it just isn't working). Therefore this obscure bug has been designated CVE-2016-2117. Reported-by: Justin Yackoski Signed-off-by: Ben Hutchings Fixes: ec5f06156423 ("net: Kill link between CSUM and SG features.") Signed-off-by: David S. Miller Signed-off-by: Willy Tarreau --- drivers/net/ethernet/atheros/atlx/atl2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/atheros/atlx/atl2.c b/drivers/net/ethernet/atheros/atlx/atl2.c index 265ce1b..96fe542 100644 --- a/drivers/net/ethernet/atheros/atlx/atl2.c +++ b/drivers/net/ethernet/atheros/atlx/atl2.c @@ -1413,7 +1413,7 @@ static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent) err = -EIO; - netdev->hw_features = NETIF_F_SG | NETIF_F_HW_VLAN_CTAG_RX; + netdev->hw_features = NETIF_F_HW_VLAN_CTAG_RX; netdev->features |= (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); /* Init PHY as early as possible due to power saving issue */ -- 2.8.0.rc2.1.gbe9624a