From patchwork Thu Aug 23 17:44:15 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 10574497 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 1A52A920 for ; Thu, 23 Aug 2018 17:44:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0327B2C5F8 for ; Thu, 23 Aug 2018 17:44:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB8252C5F7; Thu, 23 Aug 2018 17:44:42 +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=-6.4 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_WEB 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 89FDF28C98 for ; Thu, 23 Aug 2018 17:44:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727355AbeHWVP2 (ORCPT ); Thu, 23 Aug 2018 17:15:28 -0400 Received: from gateway30.websitewelcome.com ([192.185.192.34]:32943 "EHLO gateway30.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726451AbeHWVP2 (ORCPT ); Thu, 23 Aug 2018 17:15:28 -0400 X-Greylist: delayed 778 seconds by postgrey-1.27 at vger.kernel.org; Thu, 23 Aug 2018 17:15:28 EDT Received: from cm10.websitewelcome.com (cm10.websitewelcome.com [100.42.49.4]) by gateway30.websitewelcome.com (Postfix) with ESMTP id 3AD6626D98 for ; Thu, 23 Aug 2018 12:44:41 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id stecfPJMcBcCXstepfv0Cy; Thu, 23 Aug 2018 12:44:40 -0500 X-Authority-Reason: nr=8 Received: from [189.250.40.214] (port=36138 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1fstec-003JjC-DK; Thu, 23 Aug 2018 12:44:18 -0500 Date: Thu, 23 Aug 2018 12:44:15 -0500 From: "Gustavo A. R. Silva" To: Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , "Gustavo A. R. Silva" Subject: [PATCH v2] usb: iowarrior: replace kmalloc with kmalloc_array Message-ID: <20180823174415.GA26008@embeddedor.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.250.40.214 X-Source-L: No X-Exim-ID: 1fstec-003JjC-DK X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.40.214]:36138 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 10 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP A common flaw in the kernel is integer overflow during memory allocation size calculations. In an effort to reduce the frequency of these bugs, kmalloc_array was implemented, which allocates memory for an array, while at the same time detects integer overflow. This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) Signed-off-by: Gustavo A. R. Silva --- Changes in v2: - Align GFP_KERNEL to open parenthesis. drivers/usb/misc/iowarrior.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index c2991b8..ba05dd8 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -808,8 +808,8 @@ static int iowarrior_probe(struct usb_interface *interface, dev->int_in_endpoint->bInterval); /* create an internal buffer for interrupt data from the device */ dev->read_queue = - kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER), - GFP_KERNEL); + kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER, + GFP_KERNEL); if (!dev->read_queue) goto error; /* Get the serial-number of the chip */