From patchwork Mon May 6 16:30:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10931485 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 5B47214DB for ; Mon, 6 May 2019 16:32:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4B764286AA for ; Mon, 6 May 2019 16:32:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3F75928847; Mon, 6 May 2019 16:32:33 +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 D69D5286AA for ; Mon, 6 May 2019 16:32:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727273AbfEFQbt (ORCPT ); Mon, 6 May 2019 12:31:49 -0400 Received: from mail-oi1-f202.google.com ([209.85.167.202]:35543 "EHLO mail-oi1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727265AbfEFQbs (ORCPT ); Mon, 6 May 2019 12:31:48 -0400 Received: by mail-oi1-f202.google.com with SMTP id u135so4537839oia.2 for ; Mon, 06 May 2019 09:31:47 -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=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=hn4rH9KTek8R37jjBWMcf/SnTi9wO6imyjbK43Qo3YFFy0w0QB9ppRC7K8TE7v3vlN nPLbzWoXhcOl9RZZTW0CT+GOCLOJRZHlTgH0IFE90/0mo3gA6Benvmv0xM9qlEM2L7iM a5/5EdryhXK5o1zmP38+JskPbuvRNi2KBDqgGoYwdgZckW/t0t3zXYlgA28tCgQWx38p zeMjQt/2TKtd8YWaOZqpDqkiV1tfPRGdf11R4Vmzgti01WpJ/ug4M22kRPfo4KNLvnrQ G8KQ2Dx3TZLoioP3vZYIMjrpzIYzmaefwwMqniR4qNzu+AscTWd9F/aHBCgCKh66bnIf LcNw== 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=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=lqjUOCQDKFKckJbRnLY2dU0Jwe4gJUCRN+yhmsOdsLrJ3DTU1hv5IU5U0AP16e2Hhd zzVAF2m+KgwqDerYeBhtxSJBKenWsNEy/YAPDT+OZ6jx4zB2xqT3qiusXbG1uO71cnF9 4zDmNcb2EHCy+UTZtsuwzRp4vk2Fn50TqwwkfIJdG+RFu/GCozXNUfpsVy44WAEVzLjT tLUaPBymqgGVPTmBGwKegqWLq22Pgl5PgqccOfYo8q3jgC2gXcaniI1f0kOEdlcimbog 4J0/L35lfPRbCFLbZZmRqqXW0NcEvDljqHlp0NVkWEGmGGAjCUpTRLD9jX+/H8j6a8Xz xKEg== X-Gm-Message-State: APjAAAU8U6SYqWW8OGoLgzDMHh2bjHFyjeFcCo4QDCnE+T9XWDXXOPUw sqySxRiyYnH2yEXWHD8ZcEtB10QZYWHA386y X-Google-Smtp-Source: APXvYqy3zk1gAf1HD3ERPdP+fu/IbJWPYjnwXEpH7KM/4Kolrw9tSDmooPMwqXT4nvIVhZWlBkow5/TqTCzeTPOv X-Received: by 2002:a9d:6008:: with SMTP id h8mr18251374otj.55.1557160307352; Mon, 06 May 2019 09:31:47 -0700 (PDT) Date: Mon, 6 May 2019 18:30:59 +0200 In-Reply-To: Message-Id: <66d044ab9445dcf36a96205a109458ac23f38b73.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 13/17] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() 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 , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@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. ib_uverbs_(re)reg_mr() use provided user pointers for vma lookups (through e.g. mlx4_get_umem_mr()), which can only by done with untagged pointers. Untag user pointers in these functions. Signed-off-by: Andrey Konovalov --- drivers/infiniband/core/uverbs_cmd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 062a86c04123..36e7b52577d0 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -708,6 +708,8 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; @@ -790,6 +792,8 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) return -EINVAL;