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GET /api/patches/816513/?format=api
{ "id": 816513, "url": "http://patchwork.ozlabs.org/api/patches/816513/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/1505940337-79069-28-git-send-email-keescook@chromium.org/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api", "name": "Linux network development", "link_name": "netdev", "list_id": "netdev.vger.kernel.org", "list_email": "netdev@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1505940337-79069-28-git-send-email-keescook@chromium.org>", "list_archive_url": null, "date": "2017-09-20T20:45:33", "name": "[v3,27/31] x86: Implement thread_struct whitelist for hardened usercopy", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": true, "hash": "c3c29b4706882dac9509f139b664c225ed538463", "submitter": { "id": 10641, "url": "http://patchwork.ozlabs.org/api/people/10641/?format=api", "name": "Kees Cook", "email": "keescook@chromium.org" }, "delegate": { "id": 34, "url": "http://patchwork.ozlabs.org/api/users/34/?format=api", "username": "davem", "first_name": "David", "last_name": "Miller", "email": "davem@davemloft.net" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/1505940337-79069-28-git-send-email-keescook@chromium.org/mbox/", "series": [ { "id": 4231, "url": "http://patchwork.ozlabs.org/api/series/4231/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=4231", "date": "2017-09-20T20:45:22", "name": "Hardened usercopy whitelisting", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/4231/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/816513/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/816513/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<netdev-owner@vger.kernel.org>", "X-Original-To": "patchwork-incoming@ozlabs.org", "Delivered-To": "patchwork-incoming@ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=chromium.org header.i=@chromium.org\n\theader.b=\"dxDjjsJK\"; dkim-atps=neutral" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xyBx11tk1z9s8J\n\tfor <patchwork-incoming@ozlabs.org>;\n\tThu, 21 Sep 2017 07:01:09 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751872AbdITVAY (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tWed, 20 Sep 2017 17:00:24 -0400", "from mail-pf0-f182.google.com ([209.85.192.182]:54167 \"EHLO\n\tmail-pf0-f182.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1752034AbdITUwt (ORCPT\n\t<rfc822;netdev@vger.kernel.org>); Wed, 20 Sep 2017 16:52:49 -0400", "by mail-pf0-f182.google.com with SMTP id x78so2110669pff.10\n\tfor <netdev@vger.kernel.org>; Wed, 20 Sep 2017 13:52:49 -0700 (PDT)", "from www.outflux.net\n\t(173-164-112-133-Oregon.hfc.comcastbusiness.net. [173.164.112.133])\n\tby smtp.gmail.com with ESMTPSA id\n\tp10sm9623906pfd.152.2017.09.20.13.52.45\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tWed, 20 Sep 2017 13:52:46 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=chromium.org; s=google;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=3R7ykMo1QDcA1DAxnObdCr3lt2DuNxplS/riESPOmSw=;\n\tb=dxDjjsJKG6tiuJdzmEL/zoU3X2165vcSwqEhop0ZLqP8hfPf4qjbIECJQxebRfYulx\n\t+SJyEU/5q/oXGrAnkGdaFJpRURBTwcEzi5BDsSbA0Spfo4Ulv5ULOYKHxTaKKPann02U\n\tWvvuAbE+vSVwiGJTtezQJ3+baW1SY95yizyZs=", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=3R7ykMo1QDcA1DAxnObdCr3lt2DuNxplS/riESPOmSw=;\n\tb=kG8lrTa35sA6oq6zYsRpivDuSe9mjgC/nCNoZsCPBrP+YfNB0FPyvsVRYp7c/4FlVD\n\tndCq76GdqZmGiIajCStookNhIzNCBkzl6TTwDarEHpK37IhFoLNLOHgT9Cdg1dJUdttO\n\tnmxzpjf3YEmwfhSoLo+AM7bGaSO7dENtbEw2KNOb/W64LK2PdAGe/8T32cZTy2CpUd+q\n\tw4EGt14dadX3o5m0noER3FJksaKb0jvIiEkMxDwRw/opo584YnWV2hkkJatA8G0rnLXw\n\tdl+J7zGEU7RHUqjN4YtK6yHckPLLCxRWZZIpY7xXqRE7I4dRrOMBZYYjkhU7iDDgCJs7\n\tnT7w==", "X-Gm-Message-State": "AHPjjUinGXSv/2p9ztiR05ZVlHzwJQLL7AjluZn3OBoi9RCuppLU/hjt\n\tRAuSyhCv2HsiStRtbdElcruJ2Q==", "X-Google-Smtp-Source": "AOwi7QBt43NnJbfqZ+d48EKxeh/ATGvZttRyHBJZhh7heLCV726eY9KvHKoAfJmtZ58m/O14HVWhXg==", "X-Received": "by 10.84.240.196 with SMTP id l4mr3311743plt.443.1505940768866; \n\tWed, 20 Sep 2017 13:52:48 -0700 (PDT)", "From": "Kees Cook <keescook@chromium.org>", "To": "linux-kernel@vger.kernel.org", "Cc": "Kees Cook <keescook@chromium.org>, Thomas Gleixner <tglx@linutronix.de>,\n\tIngo Molnar <mingo@redhat.com>,\n\t\"H. Peter Anvin\" <hpa@zytor.com>, x86@kernel.org,\n\tBorislav Petkov <bp@suse.de>, Andy Lutomirski <luto@kernel.org>,\n\tMathias Krause <minipli@googlemail.com>,\n\tlinux-fsdevel@vger.kernel.org, netdev@vger.kernel.org,\n\tlinux-mm@kvack.org, kernel-hardening@lists.openwall.com,\n\tDavid Windsor <dave@nullcore.net>", "Subject": "[PATCH v3 27/31] x86: Implement thread_struct whitelist for\n\thardened usercopy", "Date": "Wed, 20 Sep 2017 13:45:33 -0700", "Message-Id": "<1505940337-79069-28-git-send-email-keescook@chromium.org>", "X-Mailer": "git-send-email 2.7.4", "In-Reply-To": "<1505940337-79069-1-git-send-email-keescook@chromium.org>", "References": "<1505940337-79069-1-git-send-email-keescook@chromium.org>", "Sender": "netdev-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<netdev.vger.kernel.org>", "X-Mailing-List": "netdev@vger.kernel.org" }, "content": "This whitelists the FPU register state portion of the thread_struct for\ncopying to userspace, instead of the default entire struct.\n\nCc: Thomas Gleixner <tglx@linutronix.de>\nCc: Ingo Molnar <mingo@redhat.com>\nCc: \"H. Peter Anvin\" <hpa@zytor.com>\nCc: x86@kernel.org\nCc: Borislav Petkov <bp@suse.de>\nCc: Andy Lutomirski <luto@kernel.org>\nCc: Mathias Krause <minipli@googlemail.com>\nSigned-off-by: Kees Cook <keescook@chromium.org>\nAcked-by: Rik van Riel <riel@redhat.com>\n---\n arch/x86/Kconfig | 1 +\n arch/x86/include/asm/processor.h | 8 ++++++++\n 2 files changed, 9 insertions(+)", "diff": "diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig\nindex 971feac13506..6642e8eaff45 100644\n--- a/arch/x86/Kconfig\n+++ b/arch/x86/Kconfig\n@@ -114,6 +114,7 @@ config X86\n \tselect HAVE_ARCH_MMAP_RND_COMPAT_BITS\tif MMU && COMPAT\n \tselect HAVE_ARCH_COMPAT_MMAP_BASES\tif MMU && COMPAT\n \tselect HAVE_ARCH_SECCOMP_FILTER\n+\tselect HAVE_ARCH_THREAD_STRUCT_WHITELIST\n \tselect HAVE_ARCH_TRACEHOOK\n \tselect HAVE_ARCH_TRANSPARENT_HUGEPAGE\n \tselect HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64\ndiff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h\nindex 3fa26a61eabc..868235b967ed 100644\n--- a/arch/x86/include/asm/processor.h\n+++ b/arch/x86/include/asm/processor.h\n@@ -488,6 +488,14 @@ struct thread_struct {\n \t */\n };\n \n+/* Whitelist the FPU state from the task_struct for hardened usercopy. */\n+static inline void arch_thread_struct_whitelist(unsigned long *offset,\n+\t\t\t\t\t\tunsigned long *size)\n+{\n+\t*offset = offsetof(struct thread_struct, fpu.state);\n+\t*size = fpu_kernel_xstate_size;\n+}\n+\n /*\n * Thread-synchronous status.\n *\n", "prefixes": [ "v3", "27/31" ] }