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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 AF9D9C43381 for ; Mon, 18 Feb 2019 13:58:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7FAAB2077B for ; Mon, 18 Feb 2019 13:58:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498296; bh=zCjIa/T1uM8zwij4jPOf/mH+TDrt45Ih03ZauBjMMTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=f1RILNSkesUmb49yk/r2O+FhRLcgs7LmhwJ4Y+idx+QuCucY9w2eQ5Kynen4AZVN9 gz0M4STDiYqtY8lQYP5Ub7V8CzUONtUt+5Tj+XDokMV+ASWeVe6xyjT73Waf/me+5B GG3HL7x7CIFloImSQiphw3hGYscAAypc6Ev7eRu4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388293AbfBRN6P (ORCPT ); Mon, 18 Feb 2019 08:58:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:38812 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388268AbfBRN6M (ORCPT ); Mon, 18 Feb 2019 08:58:12 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3A3B72077B; Mon, 18 Feb 2019 13:58:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498291; bh=zCjIa/T1uM8zwij4jPOf/mH+TDrt45Ih03ZauBjMMTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UoxVZNJMqx7TAOLqVWCfFcXCKxWcUTMT0WsSu7WIAgOd9MqjC3RMAO62bSbU9xlnt xjza8SKGYRElBZFyZ+Q1G6wSOa9pgHzJK6ADCXm/erASBxYmFZidcGTGccq8CDSPAX LKbQ9uG8BIvHa+k/DwfrHlpcm47bbxQ0rNc5avuU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julien Thierry , Russell King , "David A. Long" , Sasha Levin Subject: [PATCH 4.9 06/58] ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user() Date: Mon, 18 Feb 2019 14:43:27 +0100 Message-Id: <20190218133509.070271254@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190218133508.567416115@linuxfoundation.org> References: <20190218133508.567416115@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ Commit 319508902600c2688e057750148487996396e9ca upstream. Copy events to user using __copy_to_user() rather than copy members of individually with __put_user_error(). This has the benefit of disabling/enabling PAN once per event intead of once per event member. Signed-off-by: Julien Thierry Signed-off-by: Russell King Signed-off-by: David A. Long Reviewed-by: Julien Thierry Signed-off-by: Sasha Levin --- arch/arm/kernel/sys_oabi-compat.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c index 640748e27035..d844c5c9364b 100644 --- a/arch/arm/kernel/sys_oabi-compat.c +++ b/arch/arm/kernel/sys_oabi-compat.c @@ -276,6 +276,7 @@ asmlinkage long sys_oabi_epoll_wait(int epfd, int maxevents, int timeout) { struct epoll_event *kbuf; + struct oabi_epoll_event e; mm_segment_t fs; long ret, err, i; @@ -294,8 +295,11 @@ asmlinkage long sys_oabi_epoll_wait(int epfd, set_fs(fs); err = 0; for (i = 0; i < ret; i++) { - __put_user_error(kbuf[i].events, &events->events, err); - __put_user_error(kbuf[i].data, &events->data, err); + e.events = kbuf[i].events; + e.data = kbuf[i].data; + err = __copy_to_user(events, &e, sizeof(e)); + if (err) + break; events++; } kfree(kbuf); -- 2.19.1