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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no 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 E4D56C433E6 for ; Mon, 11 Jan 2021 21:07:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98C2C22D03 for ; Mon, 11 Jan 2021 21:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389740AbhAKVHi (ORCPT ); Mon, 11 Jan 2021 16:07:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727893AbhAKVHg (ORCPT ); Mon, 11 Jan 2021 16:07:36 -0500 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 678FEC061794 for ; Mon, 11 Jan 2021 13:06:56 -0800 (PST) Received: by mail-pj1-x102b.google.com with SMTP id y12so292120pji.1 for ; Mon, 11 Jan 2021 13:06:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amacapital-net.20150623.gappssmtp.com; s=20150623; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=wR8DkUvMNn7R/30CH3+3fJzHsVRXVDomopnQydl1LY0=; b=Hxm8+te8chJ1v8opBLWZlSz1RBuZEZ42iLk/gNVQy1nsChpsJG5VZOF9vI/Zqu74P0 D5PUiCZtR9UL20UVRISiNcLubomcwC1eC8xchlXA1rdoctXuvW87hT9hF/ZhxpZp0Xht 1/HK8TeXbyGgxkKSi7O+NHCJrkaBuhVXHAOVUvgOwmVI7/QzisR60Lr8n+p6zn/94iop ylgHG2jk/n6nnuWNsjby2sNwfPWDl8H9h0xo35dEX2er88zdB1ERBorvergSa23p3YyO CR+hrlc1aehSYHn3Ztje8Ykq1BjUe//g/MMlkGuESCRdEePuNSg+k6VjvfW3rfLBXC3z /Fww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=wR8DkUvMNn7R/30CH3+3fJzHsVRXVDomopnQydl1LY0=; b=mrtHaoTvTAB3DwoVvWDaT+AwFcgG0JeaPJdoOqKRYWrCQH4PZPgrkNE9x9/uEuzimn NV/5sWzwz5evWP9UNghaMTqgrvxThO1ioFanyTeYlLSEaqDK7D46E8NHJ9bycy0cBT59 wISiRZ9NedPJseii8TcsqSGjK0Mntq/4kmu3B/LVnlsbxEtM/HJAURWKqPXrgbh/e4q6 XANIBf9TZgU6nNfp+zReTYLWUBu+MAj0JJLcFCm//BZEdNLsn/gjxbl/WoMIlrB9S+xZ kdW2SUiFSJz0Lj0hxD5IRB3dQ8mqYjNxWoOr5SuKyyZMrxX+b9DD9khgYmXCnJjVZWDD Fb/w== X-Gm-Message-State: AOAM532PKl+DqfhjHSe1n/rDDnFPI6UDGDmAh6R5Gy/Iuln+BjzIcniU rma3d1S0KeCWgoG0oadBIxiDMg== X-Google-Smtp-Source: ABdhPJwo631GOEqRqXR7D5ZRF3A2z7fUYbCCz31BCoFCs/0kbtVKZXHhYfoyYf6pEs4Uv7+dTs8LiA== X-Received: by 2002:a17:902:b493:b029:dc:3e1d:4dda with SMTP id y19-20020a170902b493b02900dc3e1d4ddamr1199044plr.48.1610399215932; Mon, 11 Jan 2021 13:06:55 -0800 (PST) Received: from ?IPv6:2601:646:c200:1ef2:4d0d:5741:f5e3:172? ([2601:646:c200:1ef2:4d0d:5741:f5e3:172]) by smtp.gmail.com with ESMTPSA id t6sm307950pjg.49.2021.01.11.13.06.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 11 Jan 2021 13:06:55 -0800 (PST) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Andy Lutomirski Mime-Version: 1.0 (1.0) Subject: Re: gdbserver + fsgsbase kaputt Date: Mon, 11 Jan 2021 13:06:54 -0800 Message-Id: References: <20210111200027.GH25645@zn.tnic> Cc: Andy Lutomirski , "Chang S. Bae" , tdevries@suse.com, x86-ml , lkml In-Reply-To: <20210111200027.GH25645@zn.tnic> To: Borislav Petkov X-Mailer: iPhone Mail (18B121) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Jan 11, 2021, at 12:00 PM, Borislav Petkov wrote: > > Or do you mean I should add "unsafe_fsgsbase" to grub cmdline and bisect > with fsgsbase enabled in all test kernels? Yes. But I can also look myself in a bit.