{"id":816485,"url":"http://patchwork.ozlabs.org/api/patches/816485/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/patch/1505940337-79069-31-git-send-email-keescook@chromium.org/","project":{"id":7,"url":"http://patchwork.ozlabs.org/api/projects/7/?format=json","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":"<1505940337-79069-31-git-send-email-keescook@chromium.org>","list_archive_url":null,"date":"2017-09-20T20:45:36","name":"[v3,30/31] usercopy: Restrict non-usercopy caches to size 0","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":true,"hash":"006f517f98e82789c3f1db5c5dece7fe006c6cf9","submitter":{"id":10641,"url":"http://patchwork.ozlabs.org/api/people/10641/?format=json","name":"Kees Cook","email":"keescook@chromium.org"},"delegate":{"id":34,"url":"http://patchwork.ozlabs.org/api/users/34/?format=json","username":"davem","first_name":"David","last_name":"Miller","email":"davem@davemloft.net"},"mbox":"http://patchwork.ozlabs.org/project/netdev/patch/1505940337-79069-31-git-send-email-keescook@chromium.org/mbox/","series":[{"id":4231,"url":"http://patchwork.ozlabs.org/api/series/4231/?format=json","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/816485/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/816485/checks/","tags":{},"related":[],"headers":{"Return-Path":"","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=)","ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=chromium.org header.i=@chromium.org\n\theader.b=\"V3H9/HDP\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xyBdp1DZ7z9s4s\n\tfor ;\n\tThu, 21 Sep 2017 06:47:58 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751547AbdITUqy (ORCPT );\n\tWed, 20 Sep 2017 16:46:54 -0400","from mail-pg0-f53.google.com ([74.125.83.53]:44984 \"EHLO\n\tmail-pg0-f53.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751946AbdITUqR (ORCPT\n\t); Wed, 20 Sep 2017 16:46:17 -0400","by mail-pg0-f53.google.com with SMTP id j16so2342620pga.1\n\tfor ; Wed, 20 Sep 2017 13:46:17 -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\tx128sm7288917pgb.6.2017.09.20.13.46.06\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tWed, 20 Sep 2017 13:46:09 -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=JFGIw+81cKMLVmYd63iHJYscTNNsfq2wBAzFdbtdekM=;\n\tb=V3H9/HDP59j2n/hFz/7BTrvYrvWeZgLsWpublKhxU6WFdyrLn0xoFbFy3MZDaiVxl2\n\ttx12WSb1igH1pn9zUVY9lY5unOq1qazzkpGekFmwMQ5GLWnt8c5lBSyxhd7MfpLxlomi\n\tAsH4WV0kLhJAgsCBG3n6jx3J/CRGMJj19Eyvw=","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=JFGIw+81cKMLVmYd63iHJYscTNNsfq2wBAzFdbtdekM=;\n\tb=qvADuqWH9XoHrosa0Zy4i/qGUiQ2vgC2rJwV/dI2B30MOrkMHczlVZ8dlgkxUOrR92\n\t8VzVsOEQSsLZPe+U9lLcHH21jVn18S5VyrLWJlDXMmQ1OeNewDv2UXBuQE/KuHGYKvJx\n\tztTqIvH+17wbYnJf75nGhxaWw3TLpr9oaCPjfH3YF9VzqQjDjGq6pWNlU4PaKaUQGJC6\n\tV8ThKwArPpScutpcESz4RTqlPnkDDGn0b0XDtNFuCNQUGyhxdu1hYmYKT9YASMLcNOqg\n\tNoaEzkFBMbUx74s1JkDFlX69Vj39HppdeVkX99XoWNHpOOx8lUpaq5aVDFF+hKguVLBp\n\tff9w==","X-Gm-Message-State":"AHPjjUiqQShIEgPpyui98+CBAe7YJpe6oqC4UA3n8x3SMVIaMscgdmcs\n\tzPCXF1VUB2giF0fsjjQlTDVoZw==","X-Google-Smtp-Source":"AOwi7QAphAy2b0biylKOEm9dClveTWiyyS64CHS54TPunMIXQ1A7DTX3uQ1Xe75NWHUFgauLiUh+Dg==","X-Received":"by 10.84.129.193 with SMTP id b59mr3325130plb.43.1505940377146; \n\tWed, 20 Sep 2017 13:46:17 -0700 (PDT)","From":"Kees Cook ","To":"linux-kernel@vger.kernel.org","Cc":"Kees Cook , David Windsor ,\n\tChristoph Lameter , Pekka Enberg ,\n\tDavid Rientjes ,\n\tJoonsoo Kim ,\n\tAndrew Morton , linux-mm@kvack.org,\n\tlinux-fsdevel@vger.kernel.org, netdev@vger.kernel.org,\n\tkernel-hardening@lists.openwall.com","Subject":"[PATCH v3 30/31] usercopy: Restrict non-usercopy caches to size 0","Date":"Wed, 20 Sep 2017 13:45:36 -0700","Message-Id":"<1505940337-79069-31-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":"","X-Mailing-List":"netdev@vger.kernel.org"},"content":"With all known usercopied cache whitelists now defined in the\nkernel, switch the default usercopy region of kmem_cache_create()\nto size 0. Any new caches with usercopy regions will now need to use\nkmem_cache_create_usercopy() instead of kmem_cache_create().\n\nThis patch is modified from Brad Spengler/PaX Team's PAX_USERCOPY\nwhitelisting code in the last public patch of grsecurity/PaX based on my\nunderstanding of the code. Changes or omissions from the original code are\nmine and don't reflect the original grsecurity/PaX code.\n\nCc: David Windsor \nCc: Christoph Lameter \nCc: Pekka Enberg \nCc: David Rientjes \nCc: Joonsoo Kim \nCc: Andrew Morton \nCc: linux-mm@kvack.org\nSigned-off-by: Kees Cook \n---\n mm/slab_common.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/mm/slab_common.c b/mm/slab_common.c\nindex d4e6442f9bbc..0ac45ba6685e 100644\n--- a/mm/slab_common.c\n+++ b/mm/slab_common.c\n@@ -515,7 +515,7 @@ struct kmem_cache *\n kmem_cache_create(const char *name, size_t size, size_t align,\n \t\tunsigned long flags, void (*ctor)(void *))\n {\n-\treturn kmem_cache_create_usercopy(name, size, align, flags, 0, size,\n+\treturn kmem_cache_create_usercopy(name, size, align, flags, 0, 0,\n \t\t\t\t\t ctor);\n }\n EXPORT_SYMBOL(kmem_cache_create);\n","prefixes":["v3","30/31"]}