From patchwork Sat May 6 04:07:59 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 9714545 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DB4E660234 for ; Sat, 6 May 2017 04:08:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CE254281B7 for ; Sat, 6 May 2017 04:08:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C2CAD28678; Sat, 6 May 2017 04:08:24 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.wl.linuxfoundation.org (Postfix) with SMTP id DF78E281B7 for ; Sat, 6 May 2017 04:08:23 +0000 (UTC) Received: (qmail 28491 invoked by uid 550); 6 May 2017 04:08:22 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 28459 invoked from network); 6 May 2017 04:08:19 -0000 Date: Fri, 5 May 2017 21:07:59 -0700 From: Greg KH To: kernel-hardening@lists.openwall.com, Petr Mladek , Sergey Senozhatsky Cc: linux-kernel@vger.kernel.org, Catalin Marinas , Will Deacon , Steven Rostedt , William Roberts , Chris Fries , Dave Weinstein Message-ID: <20170506040759.GG32707@kroah.com> References: <20170506040641.GA32707@kroah.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20170506040641.GA32707@kroah.com> User-Agent: Mutt/1.8.2 (2017-04-18) Subject: [kernel-hardening] [RFC 6/6] drivers: uio: Un-restrict sysfs pointers for UIO X-Virus-Scanned: ClamAV using ClamSMTP From: Chris Fries The addr and size on the UIO devices are required by userspace to function properly. Let's unrestrict these by adding the 'P' modifier to %p and %pa. Cc: William Roberts Cc: Dave Weinstein Signed-off-by: Chris Fries Signed-off-by: Greg Kroah-Hartman --- drivers/uio/uio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 60ce7fd54e89..d9eae52519f4 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -56,12 +56,12 @@ static ssize_t map_name_show(struct uio_mem *mem, char *buf) static ssize_t map_addr_show(struct uio_mem *mem, char *buf) { - return sprintf(buf, "%pa\n", &mem->addr); + return sprintf(buf, "%paP\n", &mem->addr); } static ssize_t map_size_show(struct uio_mem *mem, char *buf) { - return sprintf(buf, "%pa\n", &mem->size); + return sprintf(buf, "%paP\n", &mem->size); } static ssize_t map_offset_show(struct uio_mem *mem, char *buf)