Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965748Ab2EOCmz (ORCPT ); Mon, 14 May 2012 22:42:55 -0400 Received: from mail1.windriver.com ([147.11.146.13]:53473 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965262Ab2EOCRi (ORCPT ); Mon, 14 May 2012 22:17:38 -0400 From: Paul Gortmaker To: , Subject: [34-longterm 121/179] staging: comedi: fix infoleak to userspace Date: Mon, 14 May 2012 22:13:37 -0400 Message-ID: <1337048075-6132-122-git-send-email-paul.gortmaker@windriver.com> X-Mailer: git-send-email 1.7.9.6 In-Reply-To: <1337048075-6132-1-git-send-email-paul.gortmaker@windriver.com> References: <1337048075-6132-1-git-send-email-paul.gortmaker@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1889 Lines: 44 From: Vasiliy Kulikov ------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. ------------------- commit 819cbb120eaec7e014e5abd029260db1ca8c5735 upstream. driver_name and board_name are pointers to strings, not buffers of size COMEDI_NAMELEN. Copying COMEDI_NAMELEN bytes of a string containing less than COMEDI_NAMELEN-1 bytes would leak some unrelated bytes. Signed-off-by: Vasiliy Kulikov Signed-off-by: Greg Kroah-Hartman Signed-off-by: Paul Gortmaker --- drivers/staging/comedi/comedi_fops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index aca9674..ac6527c 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -362,8 +362,8 @@ static int do_devinfo_ioctl(struct comedi_device *dev, /* fill devinfo structure */ devinfo.version_code = COMEDI_VERSION_CODE; devinfo.n_subdevs = dev->n_subdevices; - memcpy(devinfo.driver_name, dev->driver->driver_name, COMEDI_NAMELEN); - memcpy(devinfo.board_name, dev->board_name, COMEDI_NAMELEN); + strlcpy(devinfo.driver_name, dev->driver->driver_name, COMEDI_NAMELEN); + strlcpy(devinfo.board_name, dev->board_name, COMEDI_NAMELEN); if (read_subdev) devinfo.read_subdevice = read_subdev - dev->subdevices; -- 1.7.9.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/