From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58B8BC2D0C5 for ; Tue, 17 Dec 2019 07:51:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2467421739 for ; Tue, 17 Dec 2019 07:51:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576569096; bh=1E8uWoPIbWivZlT6LMDRe7vHB1L2KARa+dNYQ093htA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=WXzHJCnzLS8ClU8u7wETPL6D1VEfZWa4bbEtvVI0KDO+fS3wInPT6UMXqoitTe2Rg LKQJQWQFT5sio8Kal3Nt0pajygky74IVI8dwP7Uy6B8fIWaPKHH3kr8tOg7Vdkcue2 YD+Dq8CUyw+n0WHmt7YoHw/maBxkwhwZrfmdFoKQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726734AbfLQHvf (ORCPT ); Tue, 17 Dec 2019 02:51:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:50778 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbfLQHvf (ORCPT ); Tue, 17 Dec 2019 02:51:35 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2B26F206D8; Tue, 17 Dec 2019 07:51:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576569094; bh=1E8uWoPIbWivZlT6LMDRe7vHB1L2KARa+dNYQ093htA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=t5cTRKtVmcgVlKyPf/+Fq4NZ+a142ya2cOGUf2jqac16wYpl17JcmEhE6lVbW1E0G TSAw+4C26bJwSP5USnIf9leKB2cR/wpxTUlPIQ6G35x7YXAqB/QIA4vD8vHL/AmExi MOjHYC52jYgvFRzZXvvXHkENMJtJY04E6KPegZB0= Date: Tue, 17 Dec 2019 08:51:32 +0100 From: Greg KH To: Aviraj CJ Cc: peppe.cavallaro@st.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, xe-linux-external@cisco.com Subject: Re: [PATCH stable v4.4 1/2] net: stmmac: use correct DMA buffer size in the RX descriptor Message-ID: <20191217075132.GC2474507@kroah.com> References: <20191217055228.57282-1-acj@cisco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191217055228.57282-1-acj@cisco.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 16, 2019 at 09:52:27PM -0800, Aviraj CJ wrote: > upstream 583e6361414903c5206258a30e5bd88cb03c0254 commit > > We always program the maximum DMA buffer size into the receive descriptor, > although the allocated size may be less. E.g. with the default MTU size > we allocate only 1536 bytes. If somebody sends us a bigger frame, then > memory may get corrupted. > > Program DMA using exact buffer sizes. > > Signed-off-by: Aaro Koskinen > Signed-off-by: David S. Miller > [acj: backport to v4.4 -stable : > - Modified patch since v4.4 driver has no support for Big endian > - Skipped the section modifying non-existent functions in dwmac4_descs.c and > dwxgmac2_descs.c ] > Signed-off-by: Aviraj CJ I can't take stable patches for an older tree and have it "skip" newer stable trees. To be specific, this patch is already in the 4.19.41 release, but if I were to take it into the 4.4.y tree, then anyone upgrading to 4.9.y or 4.14.y afterward would run into the same issue. So can you also send backports to 4.9.y and 4.14.y so that I can take this fix into all trees? Same for patch 2/2. thanks, greg k-h