From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS53758 23.128.96.0/24 X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by dcvr.yhbt.net (Postfix) with ESMTP id 3E07B1F953 for ; Wed, 5 Jan 2022 16:41:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241979AbiAEQlC (ORCPT ); Wed, 5 Jan 2022 11:41:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241974AbiAEQlB (ORCPT ); Wed, 5 Jan 2022 11:41:01 -0500 Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D405C061245 for ; Wed, 5 Jan 2022 08:41:01 -0800 (PST) Received: by mail-wm1-x331.google.com with SMTP id f134-20020a1c1f8c000000b00345c05bc12dso3639616wmf.3 for ; Wed, 05 Jan 2022 08:41:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jrtc27.com; s=gmail.jrtc27.user; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=OvOlo0G6nzyt1FB+oPmZEwGd/0YuvJlwBrqtQkwyDTg=; b=OfEFf3q+o4OfyQVEg8leyruzmLijyuQdl7RJtBFRgERPYaJnfDJjDdFSYxRaeol1px sA4/SXF6oszaabiPTSBM5a9dMLRPCTlpFSrxiA4PfMMUe8oBegsf9pKG9zs/AlWGfCMM 7fZlg/ZfJBgkOJjcF/giM2mr8odBPKlO3TCz9IXM0KTlRsQ7zdFfNo+NgWGFDemYbUFc B1UF8DQ5rBit/fxbe0BDqGEUuX5+76GzepMwBhkAJw/SSoKHPv2ujuOckn0UNQ8ImXXD RL/w5lFzQczU/iCzcl8uWHtqAdiKu8KsJvXa7CUM4sU1BsYW2xbss60PMoFKs+1FJJX+ ZLQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=OvOlo0G6nzyt1FB+oPmZEwGd/0YuvJlwBrqtQkwyDTg=; b=MpWPW2bqfpw58BHf25g27VetfxkewktGrNXif99L8dsemSMwtVEuU2TeIMl7mPgP9M reNBFAOYqUp5906j/bpkPMTULPhaVGB0T4ftX3+7qSyhR1pBLBcq6bXwX1vEpETjkRjh JAYuTZb9yEr5yjBP3qZ2B2sDVRPvQYE1htIDPmnem9YqSqCfiuQ0Nx7lLsVIPVI7VXVJ uzEnXHig2HU2yubV6+CKLsTczMZ4xsUV1JaltS0e9zJ8XG0n/wEQ5g8q/b0VWAvihV4d csRP4Tzh9uhh0ren90qa3RHmLkiULMfGb8Fr0HqhpJPZB0/sQkotEa7+F58zKt8wfizg 4O+w== X-Gm-Message-State: AOAM533kd6LYQN+uRMcpO+QLe1S+bOCysdvo8r+0J0EpGbdlPj54kq0I +xzLb5EcS5uAvbJQvs1b/J8qPlCHva28qA== X-Google-Smtp-Source: ABdhPJwyKJNfwOf7z3kqL95/e9vSNrfUV0pLLeewiJmTI9PmMkrGthfbiVmtwArqh2Vc6AO5RrKmaQ== X-Received: by 2002:a05:600c:190c:: with SMTP id j12mr3576549wmq.166.1641400859863; Wed, 05 Jan 2022 08:40:59 -0800 (PST) Received: from smtpclient.apple (global-5-141.nat-2.net.cam.ac.uk. [131.111.5.141]) by smtp.gmail.com with ESMTPSA id q14sm40615006wro.58.2022.01.05.08.40.59 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Jan 2022 08:40:59 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) Subject: Re: [PATCH] apply: Avoid ambiguous pointer provenance for CHERI/Arm's Morello From: Jessica Clarke In-Reply-To: <20220105163935.eqfdqbeifcgj2wna@carbon> Date: Wed, 5 Jan 2022 16:40:59 +0000 Cc: git@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <85A71121-BD74-416B-BDC5-3818C6892F7C@jrtc27.com> References: <20220105132310.6600-1-jrtc27@jrtc27.com> <20220105163935.eqfdqbeifcgj2wna@carbon> To: Konstantin Khomoutov X-Mailer: Apple Mail (2.3654.120.0.1.13) Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On 5 Jan 2022, at 16:39, Konstantin Khomoutov wrote: >=20 > On Wed, Jan 05, 2022 at 01:23:10PM +0000, Jessica Clarke wrote: >=20 > [...] >> This means that, currently, the code when run on a CHERI architecture >> will preserve the metadata from the integer, i.e. an invalid = capability >> that will trap on deference, and not the pointer. >=20 > ^ You have probably meant to use "dereference" here. Indeed I did; spellcheck doesn=E2=80=99t help for wrong words... Should I send a v2, or can that be fixed on git-am? Jess