From patchwork Wed Jul 6 22:25:24 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 9217175 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C3F4D60467 for ; Wed, 6 Jul 2016 22:28:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B1A6D284DF for ; Wed, 6 Jul 2016 22:28:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A5E28284E5; Wed, 6 Jul 2016 22:28:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 60EA3284DF for ; Wed, 6 Jul 2016 22:28:25 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bKvHV-0003QH-KX; Wed, 06 Jul 2016 22:26:57 +0000 Received: from mail-pa0-x235.google.com ([2607:f8b0:400e:c03::235]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bKvGh-0002ic-2N for linux-arm-kernel@lists.infradead.org; Wed, 06 Jul 2016 22:26:08 +0000 Received: by mail-pa0-x235.google.com with SMTP id b13so143726pat.0 for ; Wed, 06 Jul 2016 15:25:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9ZQd+lJaPrJ39cmAaopxL6hWIqsqWJmfwl1vDtdMVqY=; b=fQphrToff3Pp/VDwKANC1Z9OZvARLueQmyESXrBi6Zone9mZNiPFoYRZhr/97rNGTu S+e+X6v5uiUEZoDysuAMMRFeqj+j+fF3ur+tybtA/gGVwSXxravCP0UPd/sRD7xMGY94 EeZ1ATAmHqjLoUoGy+AA2+aifgaLlS2P1jpJs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9ZQd+lJaPrJ39cmAaopxL6hWIqsqWJmfwl1vDtdMVqY=; b=l/13llQ/08P55r+D+62lF9jOPDuQxCcjiVqLaDrp5AwoXJfHjRH/Kzsy0hEktsgbxx NczwxA4Juyx73FgVRoZg3mYTbPtLQeDiK2pEhd9U12HFi4Nqass7d/vZA/NdTS2egVsO 5xr88LhtW2Jbj8iQXmv51CUGSRtAcj1r1qczJadgtMsVmxv9e1z1zvAhkviRJfA7yLRR 7gfmv5390PpVU0qwq1r0nwPPC+rBNQ0OXuw7ebAVF1ynJHv0fpjGhYP7umYHB8KoWhaF RT7H0mslvuZdYfSLmRRIjcMck/JTVWn20oFmRnrZwda1sV/o1i8OaV0z0fpQTMYsU2ta wT2g== X-Gm-Message-State: ALyK8tJCubyY+05ywDtGeeMibh725HVfaJoGF0BqYLrTmgC6f7Kpz+7ZnUc7lQ2cnBjnPoa4 X-Received: by 10.66.73.193 with SMTP id n1mr46723164pav.70.1467843945984; Wed, 06 Jul 2016 15:25:45 -0700 (PDT) Received: from www.outflux.net ([2002:ada4:7085:0:ae16:2dff:fe07:4fb6]) by smtp.gmail.com with ESMTPSA id y6sm5289405pav.1.2016.07.06.15.25.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 06 Jul 2016 15:25:45 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Subject: [PATCH 5/9] ia64/uaccess: Enable hardened usercopy Date: Wed, 6 Jul 2016 15:25:24 -0700 Message-Id: <1467843928-29351-6-git-send-email-keescook@chromium.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1467843928-29351-1-git-send-email-keescook@chromium.org> References: <1467843928-29351-1-git-send-email-keescook@chromium.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160706_152607_210706_2ABE8081 X-CRM114-Status: GOOD ( 12.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jan Kara , kernel-hardening@lists.openwall.com, Catalin Marinas , Will Deacon , linux-mm@kvack.org, sparclinux@vger.kernel.org, linux-ia64@vger.kernel.org, Christoph Lameter , Andrea Arcangeli , linux-arch@vger.kernel.org, Michael Ellerman , x86@kernel.org, Russell King , linux-arm-kernel@lists.infradead.org, Benjamin Herrenschmidt , PaX Team , Borislav Petkov , Mathias Krause , Fenghua Yu , Rik van Riel , Kees Cook , Vitaly Wool , David Rientjes , Tony Luck , Andy Lutomirski , Joonsoo Kim , Dmitry Vyukov , Laura Abbott , Brad Spengler , Ard Biesheuvel , Pekka Enberg , Casey Schaufler , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Enables CONFIG_HARDENED_USERCOPY checks on ia64. Based on code from PaX and grsecurity. Signed-off-by: Kees Cook --- arch/ia64/Kconfig | 1 + arch/ia64/include/asm/uaccess.h | 18 +++++++++++++++--- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index f80758cb7157..32a87ef516a0 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -53,6 +53,7 @@ config IA64 select MODULES_USE_ELF_RELA select ARCH_USE_CMPXCHG_LOCKREF select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_HARDENED_USERCOPY default y help The Itanium Processor Family is Intel's 64-bit successor to diff --git a/arch/ia64/include/asm/uaccess.h b/arch/ia64/include/asm/uaccess.h index 2189d5ddc1ee..465c70982f40 100644 --- a/arch/ia64/include/asm/uaccess.h +++ b/arch/ia64/include/asm/uaccess.h @@ -241,12 +241,18 @@ extern unsigned long __must_check __copy_user (void __user *to, const void __use static inline unsigned long __copy_to_user (void __user *to, const void *from, unsigned long count) { + if (!__builtin_constant_p(count)) + check_object_size(from, count, true); + return __copy_user(to, (__force void __user *) from, count); } static inline unsigned long __copy_from_user (void *to, const void __user *from, unsigned long count) { + if (!__builtin_constant_p(count)) + check_object_size(to, count, false); + return __copy_user((__force void __user *) to, from, count); } @@ -258,8 +264,11 @@ __copy_from_user (void *to, const void __user *from, unsigned long count) const void *__cu_from = (from); \ long __cu_len = (n); \ \ - if (__access_ok(__cu_to, __cu_len, get_fs())) \ - __cu_len = __copy_user(__cu_to, (__force void __user *) __cu_from, __cu_len); \ + if (__access_ok(__cu_to, __cu_len, get_fs())) { \ + if (!__builtin_constant_p(n)) \ + check_object_size(__cu_from, __cu_len, true); \ + __cu_len = __copy_user(__cu_to, (__force void __user *) __cu_from, __cu_len); \ + } \ __cu_len; \ }) @@ -270,8 +279,11 @@ __copy_from_user (void *to, const void __user *from, unsigned long count) long __cu_len = (n); \ \ __chk_user_ptr(__cu_from); \ - if (__access_ok(__cu_from, __cu_len, get_fs())) \ + if (__access_ok(__cu_from, __cu_len, get_fs())) { \ + if (!__builtin_constant_p(n)) \ + check_object_size(__cu_to, __cu_len, false); \ __cu_len = __copy_user((__force void __user *) __cu_to, __cu_from, __cu_len); \ + } \ __cu_len; \ })