Received: by 2002:a25:8b91:0:0:0:0:0 with SMTP id j17csp771333ybl; Fri, 10 Jan 2020 06:28:54 -0800 (PST) X-Google-Smtp-Source: APXvYqywiCKtUsdXWsaludjrSfPREgFw0Wi/Os79FBQSJB+VLp/sw3uMR2/Lx5yHpXaTV7DQHluu X-Received: by 2002:a9d:7851:: with SMTP id c17mr2959914otm.58.1578666534629; Fri, 10 Jan 2020 06:28:54 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1578666534; cv=none; d=google.com; s=arc-20160816; b=MiiRbYR8DfQ6tvhaAyzRpqp1Ki1zgw9j0F5pfQm416ra3DoM6j7r+DgY2KieaiukJb pCtJ+3EZ/snfoKqcRK6ZxlGzD6qbk3fO65nut3AKNDT5tKyiufTtEprNGAC05toFsGQg C7+jv1gzAiUqba0macsZBdTZOvXxlQ7F0r2MY60CmG2cxng4Be2/I4PNBYNXWdzBv/rD sMrDK1MS39QDhW+exAXYZNpxLx+Z1immhn2JvlvO66WCiaz2iLFx78riMjN5Q1M+s8VK h0ejvVAPj4mG6BGOg5yM8qeJqx4c+uBDSeIov0DpH2baI9jVs+47XnkLz2C5gRyXRsqU kK9w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:autocrypt:from:references:cc:to:subject:ironport-sdr :dkim-signature; bh=oqlcxDrVVKABFTXB0PVcwHJAiv9YGfWbqOqK+vhLhlw=; b=ztEW6wsP0O5DEQZ608c8ek2Wl6CR/1vpzs68at8pHkAiKlpl/4o2Ad1+/ExGyAbsRb 5KYXeJ38W9p6q5dI4P4l1HcAK7zqsYRDrJ2VWoqgZdHLtUqgt7xGJOALrCvrSfQ9gU6B O4rz/RYWOLBdSuAXj9MKBwSc7y3peefdoH2XG4y+l7Edx4qk76mDiW2XPfBlo7nuh+Vv vjtv4XQlXune8/KJJWVt7IEjsuW+MMLW60pihzED3ZOYeo5q/YAJfrnJ7g6/XjILwx4D bTgVZjvvfwLi5D+fWjU5AvMoCvJ36U/GuV6JGhl5k3XKSV/TIduwBeAHVMnn+RJ4hr1g PV1w== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@citrix.com header.s=securemail header.b=ADhUD7pM; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=citrix.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 17si1455463otv.149.2020.01.10.06.28.43; Fri, 10 Jan 2020 06:28:54 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@citrix.com header.s=securemail header.b=ADhUD7pM; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=citrix.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728148AbgAJO1g (ORCPT + 99 others); Fri, 10 Jan 2020 09:27:36 -0500 Received: from esa3.hc3370-68.iphmx.com ([216.71.145.155]:4197 "EHLO esa3.hc3370-68.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727362AbgAJO1f (ORCPT ); Fri, 10 Jan 2020 09:27:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1578666455; h=subject:to:cc:references:from:message-id:date: mime-version:in-reply-to:content-transfer-encoding; bh=xgqt8XWWGi2ncNcYWvt2YE34ig7SWuJftG7//Auw5T0=; b=ADhUD7pMSXp8xwBCBMElQ/PY27VAlwsVWaHQydBQvRFAyOwdaQ6gl9v6 ZeQWXJ9jXwTn+bqa6FA2XpA9tRf+I4qn4slaVMRGZOUPm53H154T+Up2Y JVgEEXG2ooKxFH00CUMSzYdyp6e1l8E2it8qmp978whuqDfynJQUiuEUz w=; Authentication-Results: esa3.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=sergey.dyasli@citrix.com; spf=Pass smtp.mailfrom=sergey.dyasli@citrix.com; spf=None smtp.helo=postmaster@mail.citrix.com Received-SPF: None (esa3.hc3370-68.iphmx.com: no sender authenticity information available from domain of sergey.dyasli@citrix.com) identity=pra; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="sergey.dyasli@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa3.hc3370-68.iphmx.com: domain of sergey.dyasli@citrix.com designates 162.221.158.21 as permitted sender) identity=mailfrom; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="sergey.dyasli@citrix.com"; x-conformance=sidf_compatible; x-record-type="v=spf1"; x-record-text="v=spf1 ip4:209.167.231.154 ip4:178.63.86.133 ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4 ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88 ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ip4:168.245.78.127 ~all" Received-SPF: None (esa3.hc3370-68.iphmx.com: no sender authenticity information available from domain of postmaster@mail.citrix.com) identity=helo; client-ip=162.221.158.21; receiver=esa3.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: n2x5OQV5+wxwJ/OY1mimcnkZJ4ZpHwMNQu/14G8v3Nz7/CTkOmZneD7S6JZIy2Fs9J6dXNq4hs yPzA2Zm7H+pQoylj4XyFgwnW0TfrJI+k2UCJ3WS4k4sw1IZTSJUOcnMZTLbw9+E6lJGTpVE7xk WuKkpUnrUHoYqEJz0JCDjkfaqbjXpIGD2I0Jhf+2Lb/MNn+sFXjQ8rxlAMLzd8JUR1uGo6cckd GYXX7QJ/w44r6HuQ5nrtWeUqy7pC7kQM5eKBp2NL2W6ER5LlkqHw+xm7tuw1gQTNwfZEicNGmm b28= X-SBRS: 2.7 X-MesageID: 10727982 X-Ironport-Server: esa3.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,417,1571716800"; d="scan'208";a="10727982" Subject: Re: [PATCH v1 4/4] xen/netback: Fix grant copy across page boundary with KASAN To: Paul Durrant CC: , , , , Andrey Ryabinin , Alexander Potapenko , "Dmitry Vyukov" , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , George Dunlap , Ross Lagerwall , Andrew Morton , "Wei Liu" , "sergey.dyasli@citrix.com >> Sergey Dyasli" References: <20200108152100.7630-1-sergey.dyasli@citrix.com> <20200108152100.7630-5-sergey.dyasli@citrix.com> From: Sergey Dyasli Autocrypt: addr=sergey.dyasli@citrix.com; keydata= xsFNBFtMVHEBEADc/hZcLexrB6vGTdGqEUsYZkFGQh6Z1OO7bCtM1go1RugSMeq9tkFHQSOc 9c7W9NVQqLgn8eefikIHxgic6tGgKoIQKcPuSsnqGao2YabsTSSoeatvmO5HkR0xGaUd+M6j iqv3cD7/WL602NhphT4ucKXCz93w0TeoJ3gleLuILxmzg1gDhKtMdkZv6TngWpKgIMRfoyHQ jsVzPbTTjJl/a9Cw99vuhFuEJfzbLA80hCwhoPM+ZQGFDcG4c25GQGQFFatpbQUhNirWW5b1 r2yVOziSJsvfTLnyzEizCvU+r/Ek2Kh0eAsRFr35m2X+X3CfxKrZcePxzAf273p4nc3YIK9h cwa4ZpDksun0E2l0pIxg/pPBXTNbH+OX1I+BfWDZWlPiPxgkiKdgYPS2qv53dJ+k9x6HkuCy i61IcjXRtVgL5nPGakyOFQ+07S4HIJlw98a6NrptWOFkxDt38x87mSM7aSWp1kjyGqQTGoKB VEx5BdRS5gFdYGCQFc8KVGEWPPGdeYx9Pj2wTaweKV0qZT69lmf/P5149Pc81SRhuc0hUX9K DnYBa1iSHaDjifMsNXKzj8Y8zVm+J6DZo/D10IUxMuExvbPa/8nsertWxoDSbWcF1cyvZp9X tUEukuPoTKO4Vzg7xVNj9pbK9GPxSYcafJUgDeKEIlkn3iVIPwARAQABzShTZXJnZXkgRHlh c2xpIDxzZXJnZXkuZHlhc2xpQGNpdHJpeC5jb20+wsGlBBMBCgA4FiEEkI7HMI5EbM2FLA1L Aa+w5JvbyusFAltMVHECGwMFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AAIQkQAa+w5JvbyusW IQSQjscwjkRszYUsDUsBr7Dkm9vK65AkEACvL+hErqbQj5yTVNqvP1rVGsXvevViglSTkHD4 9LGwEk4+ne8N4DPcqrDnyqYFd42UxTjVyoDEXEIIoy0RHWCmaspYEDX8fVmgFG3OFoeA9NAv JHssHU6B2mDAQ6M3VDmAwTw+TbXL/c1wblgGAP9kdurydZL8bevTTUh7edfnm5pwaT9HLXvl xLjz5qyt6tKEowM0xPVzCKaj3Mf/cuZFOlaWiHZ0biOPC0JeoHuz4UQTnBBUKk+n2nnn72k9 37cNeaxARwn/bxcej9QlbrrdaNGVFzjCA/CIL0KjUepowpLN0+lmYjkPgeLNYfyMXumlSNag 9qnCTh0QDsCXS/HUHPeBskAvwNpGBCkfiP/XqJ+V618ZQ1sclHa9aWNnlIR/a8xVx25t/14V R8EX/045HUpyPU8hI/yw+Fw/ugJ8W0dFzFeHU5K2tEW2W0m3ZWWWgpcBSCB17DDLIPjGX1Qc J8jiVJ7E4rfvA1JBg9BxVw5LVuXg2FB6bqnDYALfY2ydATk+ZzMUAMMilaE7/5a2RMV4TYcd 8Cf77LdgO0pB3vF6z1QmNA2IbOICtJOXpmvHj+dKFUt5hFVbvqXbuAjlrwFktbAFVGxaeIYz nQ44lQu9JqDuSH5yOytdek24Dit8SgEHGvumyj17liCG6kNzxd+2xh3uaUCA5MIALy5mZ87B TQRbTFRxARAAwqL3u/cPDA+BhU9ghtAkC+gyC5smWUL1FwTQ9CwTqcQpKt85PoaHn8sc5ctt Aj2fNT/F2vqQx/BthVOdkhj9LCwuslqBIqbri3XUyMLVV/Tf+ydzHW2AjufCowwgBguxedD1 f9Snkv+As7ZgMg/GtDqDiCWBFg9PneKvr+FPPd2WmrI8Kium4X5Zjs/a6OGUWVcIBoPpu088 z/0tlKYjTFLhoIEsf6ll4KvRQZIyGxclg3RBEuN+wgMbKppdUf2DBXYeCyrrPx809CUFzcik O99drWti2CV1gF8bnbUvfCewxwqgVKtHl2kfsm2+/lgG4CTyvnvWqUyHICZUqISdz5GidaXn TcPlsAeo2YU2NXbjwnmxzJEP/4FxgsjYIUbbxdmsK+PGre7HmGmaDZ8K77L3yHr/K7AH8mFs WUM5KiW4SnKyIQvdHkZMpvE4XrrirlZ+JI5vE043GzzpS2CGo0NFQmDJLRbpN/KQY6dkNVgA L0aDxJtAO1rXKYDSrvpL80bYyskQ4ivUa06v9SM2/bHi9bnp3Nf/fK6ErWKWmDOHWrnTgRML oQpcxoVPxw2CwyWT1069Y/CWwgnbj34+LMwMUYhPEZMitABpQE74dEtIFh0c2scm3K2QGhOP KQK3szqmXuX6MViMZLDh/B7FXLQyqwMBnZygfzZFM9vpDskAEQEAAcLBjQQYAQoAIBYhBJCO xzCORGzNhSwNSwGvsOSb28rrBQJbTFRxAhsMACEJEAGvsOSb28rrFiEEkI7HMI5EbM2FLA1L Aa+w5Jvbyuvvbg//S3d1+XL568K5BTHXaYxSqCeMqYbV9rPhEHyk+rzKtwNXSbSO8x0xZutL gYV+nkW0KMPH5Bz3I1xiRKAkiX/JLcMfx2HAXJ1Cv2rpR6bxyCGBJmuwR68uMS/gKe6AWwTY q2kt1rtZPjGl9OwVoWGJKbu2pFBLWmLAnHlXOL6WDSE1Mz2Ah3jMHOaSyAgPu1XSNa600gMJ QrSxgbe7bW72gCjeHcrIjfv+uh5cZ5/J/edpWXRuE4Tz82nxudBIHE2vnQEoJrXOh2kAJiYs G+IllDqFKDPrnS0R3DenBNG0Ir8h9W6heETnhQUc9NDFCSr81Mp0fROdBfYZnQzgSZMjN2eY pkNEWshJER4ZYY+7hAmqI51HnsKuM46QINh00jJHRMykW3TBMlwnUFxZ0gplAecjCFC7g2zj g1qNxLnxMS4wCsyEVhCkPyYnS8zuoa4ZUH37CezD01Ph4O1saln5+M4blHCEAUpZIkTGpUoi SEwtoxu6EEUYfbcjWgzJCs023hbRykZlFALoRNCwVz/FnPuVu291jn9kjvCTEeE6g2dCtOrO ukuXzk1tIeeoggsU7AJ0bzP7QOEhEckaBbP4k6ic26LJGWNMinllePyEMXzsgmMHVN//8wDT NWaanhP/JZ1v5Mfn8s1chIqC0sJIw73RvvuBkOa+jx0OwW3RFoQ= Message-ID: Date: Fri, 10 Jan 2020 14:27:30 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/01/2020 13:36, Paul Durrant wrote: > On Wed, 8 Jan 2020 at 15:21, Sergey Dyasli wrote: >> >> From: Ross Lagerwall >> >> When KASAN (or SLUB_DEBUG) is turned on, the normal expectation that >> allocations are aligned to the next power of 2 of the size does not >> hold. Therefore, handle grant copies that cross page boundaries. >> >> Signed-off-by: Ross Lagerwall >> Signed-off-by: Sergey Dyasli >> --- >> RFC --> v1: >> - Added BUILD_BUG_ON to the netback patch >> - xenvif_idx_release() now located outside the loop >> >> CC: Wei Liu >> CC: Paul Durrant > [snip] >> >> +static void __init __maybe_unused build_assertions(void) >> +{ >> + BUILD_BUG_ON(sizeof(struct xenvif_tx_cb) > 48); > > FIELD_SIZEOF(struct sk_buff, cb) rather than a magic '48' I think. The macro got renamed recently, so now it should be: sizeof_field(struct sk_buff, cb)) Thanks for the suggestion. -- Sergey