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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_MED,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 9CD5CC04AB5 for ; Mon, 3 Jun 2019 16:56:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 74E91274E3 for ; Mon, 3 Jun 2019 16:56:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="aMwQlO/u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729746AbfFCQ4S (ORCPT ); Mon, 3 Jun 2019 12:56:18 -0400 Received: from mail-oi1-f202.google.com ([209.85.167.202]:45723 "EHLO mail-oi1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729685AbfFCQ4K (ORCPT ); Mon, 3 Jun 2019 12:56:10 -0400 Received: by mail-oi1-f202.google.com with SMTP id v13so5428571oie.12 for ; Mon, 03 Jun 2019 09:56:10 -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=UdKHGBZnbXnYOdacGwXVLbo2mp7I3OpbNnEy2rn9dE0=; b=aMwQlO/uqKNquhxQCaOybakc925QpZfJO8wh15xEZQIyCg72vlDGXrUg/ROAuoQDUD yCBHc/elg2gmmBaFllCt7o9fko/cMYEXNqMBN5Ib8jP974H6cgrFWFCLBOtmTziaRGQQ SwI/Xt1vXIDm1HuVmNbFHcArxU2bsmwx6xs/PbNEoDywCtOeBm47QoZ+wae08e7pzq/K a7mRKG2GqnFCVji4AY+94HQ5eVsYgsMp8E/PA4r/OPS0psFqvjDQbyz4YEbR/PgBj2Aq 436HnabGuSm3Rvtg2LN9VhA8Rs2mRcn4xgL77EZC0LMuRu0EvZQAUUg9zFkbP9a8AWHr YN2w== 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=UdKHGBZnbXnYOdacGwXVLbo2mp7I3OpbNnEy2rn9dE0=; b=qGQ7wDrQNoAQ6HDt94ARg2SQEiJk2heypKLIPe7GJPmAUvZ2K40c9i5cV5IRRtzALS ksJ/zC30sDmiV9YvCwskIS2xIa8UQzf+A3FBbRLeBfVUzXhOOJ0lXD18Z2Dzb1JZ5vCF wQPA54lte5yNHlRy6ZIqUzNUVcr4BDQQDDYEZKJoHcmy6PB3OSVIs1RKbYPU768drDuv BmOwm2w77SrkZeiE7lsonlMtgGrBEtkqnkzCyAlG1mVSi0NJEciqsPNA/Y++S0+mBCH3 WL1iDRNe7JSka1XkDC3nQ5qDm4RomkDjleB3uvlmGjnQ3ZV3lLnpwnZorHWreFW6FGlN QbOA== X-Gm-Message-State: APjAAAUgjYvgEJK5t+ooeAzVdbm6Z6VaWk4RAPDHAZNv7HPIFwNk4WMK l5EjCpVN9XdwPUrNZLgbJTgBpo+26qTVJw7q X-Google-Smtp-Source: APXvYqxMjN/4yHR2ThXEEFJeDuxNxY18SC+MmNXgYJ7rlNGji/L0sGyo9f6aEs2c6lSgFUC7mMKDb3c6mMlyiMDt X-Received: by 2002:a9d:4109:: with SMTP id o9mr1768838ote.353.1559580969728; Mon, 03 Jun 2019 09:56:09 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:16 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.rc1.311.g5d7573a151-goog Subject: [PATCH v16 14/16] 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 , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , 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 49fd7312e2aa..96945f4cefb8 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; -- 2.22.0.rc1.311.g5d7573a151-goog