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=-3.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 B0BE4C33CB8 for ; Mon, 20 Jan 2020 08:58:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 75DBA214AF for ; Mon, 20 Jan 2020 08:58:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="WdDp0lZv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75DBA214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1C5026B0608; Mon, 20 Jan 2020 03:58:16 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 174D76B0609; Mon, 20 Jan 2020 03:58:16 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 08A626B060A; Mon, 20 Jan 2020 03:58:16 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0129.hostedemail.com [216.40.44.129]) by kanga.kvack.org (Postfix) with ESMTP id E62886B0608 for ; Mon, 20 Jan 2020 03:58:15 -0500 (EST) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id AD2D24995E5 for ; Mon, 20 Jan 2020 08:58:15 +0000 (UTC) X-FDA: 76397410950.02.song29_652b8743e4c2e X-HE-Tag: song29_652b8743e4c2e X-Filterd-Recvd-Size: 3927 Received: from mail-pf1-f193.google.com (mail-pf1-f193.google.com [209.85.210.193]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Mon, 20 Jan 2020 08:58:15 +0000 (UTC) Received: by mail-pf1-f193.google.com with SMTP id p14so15518998pfn.4 for ; Mon, 20 Jan 2020 00:58:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=OtvuAZ/43/mZHHfizo8i6GGUaKzklYrgQcNWjIYaCCE=; b=WdDp0lZvPJmeAzRMpIwzwDhesFmt4i0sEFxsoWiXOtYFS56QGmK9RMbCK6kw8m7QEI 0X5HiIFpbovQKTm2dPFyoK+0BD8h+9nyX/EFDXoRsjNg9SiNa1Dw9kMgtS9ic0wJ/tEG oZuRKII7pM05FfYMOJ3FqF18EyzDEVz6sDyEGT2vwoMuUIYkc04jldFVMxGXrGzXmA+k qj0YNEJsKBVQNQVF/I6qffKSeeh1cr9HqY0z+JZtXKYILrthO4WKzF5wlkNwEJgwKAte f11oQtwy1F8rNTly7RHk8geriY8aPkf0JWTAO66sju9daX5QTYNgOspqFFcF7ixy3mPQ jYCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=OtvuAZ/43/mZHHfizo8i6GGUaKzklYrgQcNWjIYaCCE=; b=lEuMfZ5nRH5GwKMidMVcIeJvGYjVmipTvdM5q/FztspNAwPEbwXxxjqj5THB/eg1fW cDkWdsgyTLNNt1OpXyiBWl+QDV7KqHkTo3UmyyW4L/nDZ6jsSFxuksY7+pDQPN9peyB+ dJtKklQvu5JemVTtDUkpbtJHdYK0LXyovsA5mAecwYSVyG42AdCyjsJ/j1Da85EcdsSC OeoSUyiKIxJEdgjSH7rDcsX3DxE1G7a6DHiMflHxvXfYtYKBZ8nTo9GPZR0KmQp5ySmj xM+dEQPKf0EXvicIZDqXtRz9mdoX4Qw9WzXB+s7Dfup9rarHdkohMdeweYLrYrVVbLL+ C+Og== X-Gm-Message-State: APjAAAWPUTS8PoitjU1gu4ytJXjPJPkpy2EDkAtBb2h5m7Q3hytsLciK cIc7e0XGFH7EnFRHvcUVp5ERGh9IvBH2ZqpyWkI= X-Google-Smtp-Source: APXvYqxDKYl6lynrRj2aQbMI8J4UD8eLFvatdUCj7kFSIsY6n7F0dc4aX6kmUr5QAY/bvs1TX2M2j/bAQhNekoygjc0= X-Received: by 2002:a63:220b:: with SMTP id i11mr58192051pgi.50.1579510693988; Mon, 20 Jan 2020 00:58:13 -0800 (PST) MIME-Version: 1.0 References: <20200117125834.14552-1-sergey.dyasli@citrix.com> <20200117125834.14552-5-sergey.dyasli@citrix.com> In-Reply-To: <20200117125834.14552-5-sergey.dyasli@citrix.com> From: Paul Durrant Date: Mon, 20 Jan 2020 08:58:02 +0000 Message-ID: Subject: Re: [PATCH v2 4/4] xen/netback: fix grant copy across page boundary To: Sergey Dyasli Cc: xen-devel@lists.xen.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , George Dunlap , Ross Lagerwall , Andrew Morton , Wei Liu Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, 17 Jan 2020 at 12:59, Sergey Dyasli wrote: > > From: Ross Lagerwall > > When KASAN (or SLUB_DEBUG) is turned on, there is a higher chance that > non-power-of-two allocations are not aligned to the next power of 2 of > the size. Therefore, handle grant copies that cross page boundaries. > > Signed-off-by: Ross Lagerwall > Signed-off-by: Sergey Dyasli > --- > v1 --> v2: > - Use sizeof_field(struct sk_buff, cb)) instead of magic number 48 > - Slightly update commit message > > RFC --> v1: > - Added BUILD_BUG_ON to the netback patch > - xenvif_idx_release() now located outside the loop > > CC: Wei Liu > CC: Paul Durrant Acked-by: Paul Durrant