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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham 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 B03B5C606A7 for ; Mon, 8 Jul 2019 10:52:41 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8019120651 for ; Mon, 8 Jul 2019 10:52:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8019120651 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40370 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkRGC-0007AQ-NG for qemu-devel@archiver.kernel.org; Mon, 08 Jul 2019 06:52:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39977) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkRCC-00031X-23 for qemu-devel@nongnu.org; Mon, 08 Jul 2019 06:48:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hkRCB-0006Jq-22 for qemu-devel@nongnu.org; Mon, 08 Jul 2019 06:48:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46770) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hkRC8-0006Hw-K9; Mon, 08 Jul 2019 06:48:28 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0B6E02DE413; Mon, 8 Jul 2019 10:48:24 +0000 (UTC) Received: from x1w.redhat.com (ovpn-204-112.brq.redhat.com [10.40.204.112]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A66662E03C; Mon, 8 Jul 2019 10:48:18 +0000 (UTC) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Date: Mon, 8 Jul 2019 12:47:50 +0200 Message-Id: <20190708104750.1071-4-philmd@redhat.com> In-Reply-To: <20190708104750.1071-1-philmd@redhat.com> References: <20190708104750.1071-1-philmd@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 08 Jul 2019 10:48:24 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH-for-4.1 v5 3/3] hw/ssi/xilinx_spips: Avoid out-of-bound access to lqspi_buf[] X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Francisco Iglesias , Alistair Francis , qemu-stable@nongnu.org, Prasad J Pandit , Lei Sun , qemu-arm@nongnu.org, "Edgar E. Iglesias" , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Both lqspi_read() and lqspi_load_cache() expect a 32-bit aligned address. >From UG1085 datasheet [*] Chapter 22: Quad-SPI Controller: Transfer Size Limitations Because of the 32-bit wide TX, RX, and generic FIFO, all APB/AXI transfers must be an integer multiple of 4-bytes. Shorter transfers are not possible. Set MemoryRegionOps.impl values to force 32-bit accesses, this way we are sure we do not access the lqspi_buf[] array out of bound. [*] https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-= ultrascale-trm.pdf Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- v5: add datasheet reference, drop RFC prefix, fix build (Francisco) --- hw/ssi/xilinx_spips.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c index 3c4e8365ee..b29e0a4a89 100644 --- a/hw/ssi/xilinx_spips.c +++ b/hw/ssi/xilinx_spips.c @@ -1239,6 +1239,10 @@ static const MemoryRegionOps lqspi_ops =3D { .read_with_attrs =3D lqspi_read, .write_with_attrs =3D lqspi_write, .endianness =3D DEVICE_NATIVE_ENDIAN, + .impl =3D { + .min_access_size =3D 4, + .max_access_size =3D 4, + }, .valid =3D { .min_access_size =3D 1, .max_access_size =3D 4 --=20 2.20.1