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=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 6A25AC43219 for ; Tue, 30 Apr 2019 13:26:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 35EF62075E for ; Tue, 30 Apr 2019 13:26:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FRME1COe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728861AbfD3N0e (ORCPT ); Tue, 30 Apr 2019 09:26:34 -0400 Received: from mail-yw1-f74.google.com ([209.85.161.74]:54982 "EHLO mail-yw1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727232AbfD3N0F (ORCPT ); Tue, 30 Apr 2019 09:26:05 -0400 Received: by mail-yw1-f74.google.com with SMTP id d71so12901907ywd.21 for ; Tue, 30 Apr 2019 06:26:04 -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=5vVbThWFeNTYFxwbQq67jdT1oZny+xOKBFoxX+2Uk7M=; b=FRME1COezh5b+xsqn4P+Wuk9kST7usWvir2xQhAmIzYbqhd+Dle1XM/PaJl5NwGBwF z7/SMrTqJtHy/gO4CF7xbqlFAwpIk8PwR9mnXkXEY1b5HFuyeguAZJRX9uVnCx/+N6Cg GdXjue/eQFQ6wfKzJUzNubo15IJ6ki/RwkeGwPRaQhUCcsmSJMlmZ6DdqtqFu3fOL0bX 01e0qP9aKT8hITIugatecY8TuWXLv4w13ho7n2rx3qvyQwxwSmnnV+ESWDP6rPMjBLm6 9em8VBa1zwsikfNNQo9I2iNQIYFHDIjY+xXevJ0y76Ma6MtOAyKoTjWTXLT8lERzPHTd 0Kew== 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=5vVbThWFeNTYFxwbQq67jdT1oZny+xOKBFoxX+2Uk7M=; b=uc9wnIye4ost1zlA1jFFHJidXuHSsYzKxbNo8JV4g6sCPIpt+kfdB9v0MJzSTqnR/B 6zIHQdQAlRpfsbPR4Sl2lAbp/SL9qFjARR/R2sseqNID0FbdbrLnT0atRYLjwL3R9OXJ qfYo5Rdql8oI3KLTMiJC2w4JFY6mbnqtB2YUL1MG5Q+aONnRUXKLqxFCi/bK/quAxvWd yyNaFCMugnyQeKKHDWBsxf0bX8UnK5oRNHyIRAfFKkRk4T27ciPSxm2KFXLnMNSA2zWd nwUYAdCk9somqt6Dr45tdaPahL81UFffrhgCybXWxLVA3VXjf2zu/Pm7pZub8vXHFweU 0tEw== X-Gm-Message-State: APjAAAVi75Xoj8oolURv1+qsYIKsSNWWD33FaLFqIlLwruIfUCbaFc1n v0LI+hahPqU/JyJa2pkP7dCp91mPIiTZY4+t X-Google-Smtp-Source: APXvYqyv8kHiq9IuRt8k8uxL630nsRVEEuszbAKJggJOMl5SWFBjzMAnW0IWxRwAYYoqlPXLLWZ5sEsVnC5FF0Vx X-Received: by 2002:a81:3c89:: with SMTP id j131mr56890450ywa.183.1556630764032; Tue, 30 Apr 2019 06:26:04 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:11 +0200 In-Reply-To: Message-Id: <1b2a46dbfa24bde41f11cff6f53683a5ea5915c7.1556630205.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 15/17] tee, arm64: untag user pointers in tee_shm_register From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@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 Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Kuehling@google.com, Felix , Deucher@google.com, Alexander , Koenig@google.com, Christian , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. tee_shm_register()->optee_shm_unregister()->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/tee_shm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 0b9ab1d0dd45..8e7b52ab6c63 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -263,6 +263,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, shm->teedev = teedev; shm->ctx = ctx; shm->id = -1; + addr = untagged_addr(addr); start = rounddown(addr, PAGE_SIZE); shm->offset = addr - start; shm->size = length; -- 2.21.0.593.g511ec345e18-goog