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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 AE82CC32757 for ; Tue, 13 Aug 2019 01:12:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82BA22070C for ; Tue, 13 Aug 2019 01:12:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726316AbfHMBMz (ORCPT ); Mon, 12 Aug 2019 21:12:55 -0400 Received: from mga03.intel.com ([134.134.136.65]:29948 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726543AbfHMBMy (ORCPT ); Mon, 12 Aug 2019 21:12:54 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Aug 2019 18:12:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,379,1559545200"; d="scan'208";a="176062478" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.41]) by fmsmga008.fm.intel.com with ESMTP; 12 Aug 2019 18:12:53 -0700 From: Sean Christopherson To: Jarkko Sakkinen Cc: linux-sgx@vger.kernel.org, Andy Lutomirski Subject: [PATCH for_v22 v2 3/8] x86/sgx: Validate generic SECINFO immediately after copying from user Date: Mon, 12 Aug 2019 18:12:47 -0700 Message-Id: <20190813011252.4121-4-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190813011252.4121-1-sean.j.christopherson@intel.com> References: <20190813011252.4121-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-sgx-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org When adding pages to the encalve, verify the SECINFO flags provided by userspace are valid prior to consuming the protection bits and to avoid allocating a page when SECINFO is invalid. Signed-off-by: Sean Christopherson --- arch/x86/kernel/cpu/sgx/driver/ioctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/driver/ioctl.c b/arch/x86/kernel/cpu/sgx/driver/ioctl.c index bc65249ed5df..5831f51d64cd 100644 --- a/arch/x86/kernel/cpu/sgx/driver/ioctl.c +++ b/arch/x86/kernel/cpu/sgx/driver/ioctl.c @@ -519,8 +519,6 @@ static int sgx_encl_add_page(struct sgx_encl *encl, unsigned long addr, struct sgx_va_page *va_page; int ret; - if (sgx_validate_secinfo(secinfo)) - return -EINVAL; if (page_type == SGX_SECINFO_TCS) { ret = sgx_validate_tcs(encl, data); if (ret) @@ -635,6 +633,9 @@ static long sgx_ioc_enclave_add_page(struct file *filep, void __user *arg) sizeof(secinfo))) return -EFAULT; + if (sgx_validate_secinfo(&secinfo)) + return -EINVAL; + data_page = alloc_page(GFP_HIGHUSER); if (!data_page) return -ENOMEM; -- 2.22.0