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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 16748C25B75 for ; Mon, 3 Jun 2024 11:58:26 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sE6Jx-0002gZ-Vv; Mon, 03 Jun 2024 07:57:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sE6Jv-0002cY-Ha for qemu-devel@nongnu.org; Mon, 03 Jun 2024 07:57:47 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sE6Js-0006x9-EO for qemu-devel@nongnu.org; Mon, 03 Jun 2024 07:57:47 -0400 Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4VtBtj4bcnz6K6jv; Mon, 3 Jun 2024 19:53:01 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 34A931400CD; Mon, 3 Jun 2024 19:57:31 +0800 (CST) Received: from localhost (10.202.227.76) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Mon, 3 Jun 2024 12:57:30 +0100 Date: Mon, 3 Jun 2024 12:57:29 +0100 To: Ira Weiny CC: "Michael S. Tsirkin" , , Fan Ni , Peter Maydell Subject: Re: [PATCH] hw/cxl: Fix read from bogus memory Message-ID: <20240603125729.00005ef6@Huawei.com> In-Reply-To: <20240531-fix-poison-set-cacheline-v1-1-e3bc7e8f1158@intel.com> References: <20240531-fix-poison-set-cacheline-v1-1-e3bc7e8f1158@intel.com> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 4.1.0 (GTK 3.24.33; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.202.227.76] X-ClientProxiedBy: lhrpeml100002.china.huawei.com (7.191.160.241) To lhrpeml500005.china.huawei.com (7.191.163.240) Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron From: Jonathan Cameron via Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Fri, 31 May 2024 11:22:05 -0500 Ira Weiny wrote: > Peter and coverity report: > > We've passed '&data' to address_space_write(), which means "read > from the address on the stack where the function argument 'data' > lives", so instead of writing 64 bytes of data to the guest , > we'll write 64 bytes which start with a host pointer value and > then continue with whatever happens to be on the host stack > after that. > > Indeed the intention was to write 64 bytes of data at the address given. > > Fix the parameter to address_space_write(). > > Reported-by: Peter Maydell > Link: https://lore.kernel.org/all/CAFEAcA-u4sytGwTKsb__Y+_+0O2-WwARntm3x8WNhvL1WfHOBg@mail.gmail.com/ > Fixes: 6bda41a69bdc ("hw/cxl: Add clear poison mailbox command support.") > Cc: Jonathan Cameron > Signed-off-by: Ira Weiny > --- > Compile tested only. Jonathan please double check me. Looks good to me. Reviewed-by: Jonathan Cameron > --- > hw/mem/cxl_type3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c > index 3e42490b6ce8..582412d9925f 100644 > --- a/hw/mem/cxl_type3.c > +++ b/hw/mem/cxl_type3.c > @@ -1025,7 +1025,7 @@ static bool set_cacheline(CXLType3Dev *ct3d, uint64_t dpa_offset, uint8_t *data) > as = &ct3d->hostpmem_as; > } > > - address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, &data, > + address_space_write(as, dpa_offset, MEMTXATTRS_UNSPECIFIED, data, > CXL_CACHE_LINE_SIZE); > return true; > } > > --- > base-commit: 3b2fe44bb7f605f179e5e7feb2c13c2eb3abbb80 > change-id: 20240531-fix-poison-set-cacheline-e32bc1e74b27 > > Best regards,