From patchwork Sun Aug 18 18:28:47 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yann Droneaud X-Patchwork-Id: 2846207 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9D516BF546 for ; Sun, 18 Aug 2013 18:34:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D305D20212 for ; Sun, 18 Aug 2013 18:34:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CCE4620201 for ; Sun, 18 Aug 2013 18:34:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754289Ab3HRSeg (ORCPT ); Sun, 18 Aug 2013 14:34:36 -0400 Received: from smtp1-g21.free.fr ([212.27.42.1]:54126 "EHLO smtp1-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753218Ab3HRSeg (ORCPT ); Sun, 18 Aug 2013 14:34:36 -0400 Received: from localhost.localdomain (unknown [IPv6:2a01:e35:2e9f:6ac0:f909:bc73:7b7d:1daf]) by smtp1-g21.free.fr (Postfix) with ESMTP id E09CC94001B; Sun, 18 Aug 2013 20:34:27 +0200 (CEST) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by localhost.localdomain (8.14.7/8.14.7) with ESMTP id r7IITTcZ032005; Sun, 18 Aug 2013 20:29:29 +0200 Received: (from ydroneaud@localhost) by localhost.localdomain (8.14.7/8.14.7/Submit) id r7IITTpw032004; Sun, 18 Aug 2013 20:29:29 +0200 From: Yann Droneaud To: linux-rdma@vger.kernel.org Cc: Yann Droneaud Subject: [PATCH 11/22] ucm: ib_ucm_write(): strict userspace buffer length check Date: Sun, 18 Aug 2013 20:28:47 +0200 Message-Id: <714cf2aeb7cfd12e3e3290b9391a1e8a46d4e759.1376847403.git.ydroneaud@opteya.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-9.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Like uverbs, strictly check the length parameter: this prevent ucm from processing truncated buffer. Signed-off-by: Yann Droneaud Link: http://mid.gmane.org/cover.1376847403.git.ydroneaud@opteya.com --- drivers/infiniband/core/ucm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c index 49bf680..81dc068 100644 --- a/drivers/infiniband/core/ucm.c +++ b/drivers/infiniband/core/ucm.c @@ -1178,7 +1178,7 @@ static ssize_t ib_ucm_write(struct file *filp, const char __user *buf, if (copy_from_user(&hdr, buf, sizeof(hdr))) return -EFAULT; - if (hdr.in + sizeof(hdr) > len) + if (hdr.in + sizeof(hdr) != len) return -EINVAL; if (hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))