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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D55F2ECE58D for ; Thu, 17 Oct 2019 19:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9CE320650 for ; Thu, 17 Oct 2019 19:39:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439820AbfJQTjp (ORCPT ); Thu, 17 Oct 2019 15:39:45 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:45050 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437635AbfJQTjp (ORCPT ); Thu, 17 Oct 2019 15:39:45 -0400 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iLBcd-0006f2-4o; Thu, 17 Oct 2019 19:39:43 +0000 From: Al Viro To: linux-scsi@vger.kernel.org Cc: Linus Torvalds , linux-kernel@vger.kernel.org, Al Viro Subject: [RFC PATCH 2/8] sg_new_write(): replace access_ok() + __copy_from_user() with copy_from_user() Date: Thu, 17 Oct 2019 20:39:19 +0100 Message-Id: <20191017193925.25539-2-viro@ZenIV.linux.org.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191017193925.25539-1-viro@ZenIV.linux.org.uk> References: <20191017193659.GA18702@ZenIV.linux.org.uk> <20191017193925.25539-1-viro@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Al Viro Signed-off-by: Al Viro --- drivers/scsi/sg.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 634460421ce4..026628aa556d 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -763,11 +763,7 @@ sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf, sg_remove_request(sfp, srp); return -EMSGSIZE; } - if (!access_ok(hp->cmdp, hp->cmd_len)) { - sg_remove_request(sfp, srp); - return -EFAULT; /* protects following copy_from_user()s + get_user()s */ - } - if (__copy_from_user(cmnd, hp->cmdp, hp->cmd_len)) { + if (copy_from_user(cmnd, hp->cmdp, hp->cmd_len)) { sg_remove_request(sfp, srp); return -EFAULT; } -- 2.11.0