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[23.128.96.33]) by mx.google.com with ESMTPS id bg10-20020a056a02010a00b005aa833a5337si12619049pgb.600.2023.11.16.02.14.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Nov 2023 02:14:47 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) client-ip=23.128.96.33; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b="gjQ20O/o"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id D23D4816F0D3; Thu, 16 Nov 2023 02:14:41 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235610AbjKPKOU (ORCPT + 99 others); Thu, 16 Nov 2023 05:14:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230352AbjKPKOT (ORCPT ); Thu, 16 Nov 2023 05:14:19 -0500 Received: from mail-yw1-x1129.google.com (mail-yw1-x1129.google.com [IPv6:2607:f8b0:4864:20::1129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 114FBD4D for ; Thu, 16 Nov 2023 02:14:12 -0800 (PST) Received: by mail-yw1-x1129.google.com with SMTP id 00721157ae682-5b383b4184fso6849937b3.1 for ; Thu, 16 Nov 2023 02:14:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1700129651; x=1700734451; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=S5z27wFZQcKESSrI85AK8SZJIpmMB6uhj5fEtkmaII8=; b=gjQ20O/oXiMttAWwKuYqRM8jsItpyrbgUftQOi5nWSPBZNynU2otEfAQ8TbFpi4nYv L2+mS6P5WPvxvBfcqlZXflak3skFOepr6piLa+3rwyHsi3Ndddhv/X+RasJn1W8E9YTn CcaQARRW3sYpKEJ8NwjYfrexPmk+IxEhSyt2Uj6v6k8oSC0xpt9FtPO4uhQfXnacz3Pw TtQevSy1Zitg1U2DBbPBp6TCzpgAnw2fSOk4OVZlBI0YbH9svNI3TddNsMuUF4zrzWrH lNvL1tVYYO4RoTabtVk3DbSNmT+xfAMzRWD5HqmCFqkYWjmWaJ2maieVCvzRMmsjjZKr grcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700129651; x=1700734451; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=S5z27wFZQcKESSrI85AK8SZJIpmMB6uhj5fEtkmaII8=; b=g0uQSaKrssgHPPGfUObhyYD/xoeHqN4UlzxXQ394Mr0sCj8VibghJGVFq5OPM9cTU9 039wmNR6v8KH0ebXRDGDhZuOZ6jGegVrKnBdRqZEtaOi4Pj2MVuu8GJVcMaKH4L/JZEc f4Snty1pEi+M5iYHgoePU0gzHaEGBHnvdQbXOutUtSFpTo5HYShhMzndbHW3bRmTSeTx wvnDgLVsxodctsDx3ifFuw3QroxPW/baCvupH6FFF74yx874VAh9SyaNvj2/QVkGuDn2 JZZ8emnlvGWMcmjFHesI83LjTfNJshcMS2aCk5mrRDWm5gaY1w686RsuzLFYRLw1BoLU Vq8w== X-Gm-Message-State: AOJu0YwdXiCcWAwMf8MT9fK+14pHqyBYcR19KrcWgISIOQ/nzOG1PVqi JcIjGmVcpah/bDGftuFgJGe1VXXkVZ7Vi5Rm088Z7w== X-Received: by 2002:a81:47c3:0:b0:594:f864:8507 with SMTP id u186-20020a8147c3000000b00594f8648507mr15893002ywa.51.1700129651150; Thu, 16 Nov 2023 02:14:11 -0800 (PST) MIME-Version: 1.0 References: <20231115203401.2495875-1-iii@linux.ibm.com> <20231115203401.2495875-7-iii@linux.ibm.com> In-Reply-To: <20231115203401.2495875-7-iii@linux.ibm.com> From: Alexander Potapenko Date: Thu, 16 Nov 2023 11:13:30 +0100 Message-ID: Subject: Re: [PATCH 06/32] kmsan: Fix kmsan_copy_to_user() on arches with overlapping address spaces To: Ilya Leoshkevich Cc: Alexander Gordeev , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka , Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-8.4 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Thu, 16 Nov 2023 02:14:42 -0800 (PST) On Wed, Nov 15, 2023 at 9:34=E2=80=AFPM Ilya Leoshkevich wrote: > > Comparing pointers with TASK_SIZE does not make sense when kernel and > userspace overlap. Assume that we are handling user memory access in > this case. > > Reported-by: Alexander Gordeev > Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko