From patchwork Wed Jul 27 15:20:53 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Whitcroft X-Patchwork-Id: 107110 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from chlorine.canonical.com (chlorine.canonical.com [91.189.94.204]) by ozlabs.org (Postfix) with ESMTP id 0FF87B6F6F for ; Thu, 28 Jul 2011 01:21:17 +1000 (EST) Received: from localhost ([127.0.0.1] helo=chlorine.canonical.com) by chlorine.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1Qm5uz-0000lX-JK; Wed, 27 Jul 2011 15:21:05 +0000 Received: from adelie.canonical.com ([91.189.90.139]) by chlorine.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1Qm5ur-0000cN-Lz for kernel-team@lists.ubuntu.com; Wed, 27 Jul 2011 15:20:57 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by adelie.canonical.com with esmtp (Exim 4.71 #1 (Debian)) id 1Qm5ur-0001As-Ih for ; Wed, 27 Jul 2011 15:20:57 +0000 Received: from [85.210.144.167] (helo=localhost.localdomain) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1Qm5ur-0003rH-Ex for kernel-team@lists.ubuntu.com; Wed, 27 Jul 2011 15:20:57 +0000 From: Andy Whitcroft To: kernel-team@lists.ubuntu.com Subject: [lucid/fsl-imx51 CVE 2/2] gro: reset skb_iif on reuse Date: Wed, 27 Jul 2011 16:20:53 +0100 Message-Id: <1311780055-21853-3-git-send-email-apw@canonical.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1311780055-21853-1-git-send-email-apw@canonical.com> References: <1311780055-21853-1-git-send-email-apw@canonical.com> X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.13 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: kernel-team-bounces@lists.ubuntu.com Errors-To: kernel-team-bounces@lists.ubuntu.com From: Andy Gospodarek commit 6d152e23ad1a7a5b40fef1f42e017d66e6115159 upstream. Like Herbert's change from a few days ago: 66c46d741e2e60f0e8b625b80edb0ab820c46d7a gro: Reset dev pointer on reuse this may not be necessary at this point, but we should still clean up the skb->skb_iif. If not we may end up with an invalid valid for skb->skb_iif when the skb is reused and the check is done in __netif_receive_skb. Signed-off-by: Andy Gospodarek Signed-off-by: David S. Miller Signed-off-by: Brandon Philips Signed-off-by: Greg Kroah-Hartman Signed-off-by: Tim Gardner CVE-2011-1478 BugLink: http://bugs.launchpad.net/bugs/816549 Signed-off-by: Andy Whitcroft --- net/core/dev.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index bed9dc3..8b1847c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2558,6 +2558,7 @@ void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb) __skb_pull(skb, skb_headlen(skb)); skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb)); skb->dev = napi->dev; + skb->iif = 0; napi->skb = skb; }