From patchwork Wed Mar 20 14:51:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10861939 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 57ABB13B5 for ; Wed, 20 Mar 2019 14:52:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4420E29D12 for ; Wed, 20 Mar 2019 14:52:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4156129DA9; Wed, 20 Mar 2019 14:52:46 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E370029D12 for ; Wed, 20 Mar 2019 14:52:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728246AbfCTOwp (ORCPT ); Wed, 20 Mar 2019 10:52:45 -0400 Received: from mail-pg1-f202.google.com ([209.85.215.202]:43512 "EHLO mail-pg1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728254AbfCTOwo (ORCPT ); Wed, 20 Mar 2019 10:52:44 -0400 Received: by mail-pg1-f202.google.com with SMTP id u2so2645754pgi.10 for ; Wed, 20 Mar 2019 07:52:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=f9ERttYki6e1riSpYQlVbWsSBMZZ5wUdNGpNySk9y5Q=; b=UEIrebSocaYvFV95VdsGvR0rHtsKUFScYsCVqiArhFekiKhlWYwiMy63Q0mC7IZj9p 3mqU7Dbhm6OqOVB4ThhETYV9ikDo0pqEW49iSRluDE7bkzQRnUB022yUHTxms2owX+51 Hl02fMI+fjjQXXTnP9hJUKytXL22/eMlF/bW9F6Y2oo6WfEnYpRt49Ftd9iSm88pEvyR KMbIbd0h7q6Pew5AmmXiW7TnoUcvWa8wf/gj7ZnzJQoLjgL/IjA++G9JudTdsHLO21Cq CbofADar+N5IG2433ecku3GOiSdWNlbt2i7KcQfTHs/DmBtW8hG6MdXe8FPq3GsM/Hb6 HDrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=f9ERttYki6e1riSpYQlVbWsSBMZZ5wUdNGpNySk9y5Q=; b=EnuWGenJa1wdkUbGka+Iq7t0rHF+vjWguDJW26gKlqFBO/g9wP2LPEzhiECll4Xrbq q6pw9+Gfl30gMBAVVuunmtl8S27gKIXGJc291TcxGJu6GC08cyIxVghHV/Q/kd7ReZuT gJRzC4DgURfjZChRu76srugViQhx21EjYdggfXIua0h7KhXl4103Qwc1ODC4Aa2Y4Zxv 7r6/CBPiB7G0IwuzYlZYsw8IADNh60s0tSjFxxrHLMMRzvqTqoxlB2rOM40+GP4UYE6C RCcoiyET4IzK4nqtcf/1Uqt7oOpT8UDpk6zUDU89XrDPdVxPTc6k+nTIPMtR98dckauH M5Bw== X-Gm-Message-State: APjAAAX5H2zf5sqdjmY24chvDRKrwPhrenwtkSugj3chgEcQewQD2lyN QQIIOp+78lpVrOjdjP6veOE7erIQ3MflsMzh X-Google-Smtp-Source: APXvYqw7j6q1fx3m56nHOtW1Q2mzw9Sw141YoRGaaXVbYutXBT4BRu1TSW8d2p37GhTJbzzsOqgRxlx9WtXnbKVc X-Received: by 2002:a63:2ac2:: with SMTP id q185mr3933319pgq.119.1553093563022; Wed, 20 Mar 2019 07:52:43 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:32 +0100 In-Reply-To: Message-Id: <665632a911273ab537ded9acb78f4bafd91cbc19.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 18/20] tee/optee, arm64: untag user pointers in check_mem_type From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , " =?utf-8?q?Christian_K=C3=B6nig?= " , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- drivers/tee/optee/call.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index a5afbe6dee68..e3be20264092 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -563,6 +563,7 @@ static int check_mem_type(unsigned long start, size_t num_pages) int rc; down_read(&mm->mmap_sem); + start = untagged_addr(start); rc = __check_mem_type(find_vma(mm, start), start + num_pages * PAGE_SIZE); up_read(&mm->mmap_sem);