From patchwork Mon Jul 16 22:03:06 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: 10527709 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 34684600D0 for ; Mon, 16 Jul 2018 22:03:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 193FE28C31 for ; Mon, 16 Jul 2018 22:03:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C85828EAB; Mon, 16 Jul 2018 22:03:12 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI 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 92C8128C31 for ; Mon, 16 Jul 2018 22:03:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730246AbeGPWcc (ORCPT ); Mon, 16 Jul 2018 18:32:32 -0400 Received: from gateway21.websitewelcome.com ([192.185.45.155]:21630 "EHLO gateway21.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728758AbeGPWcc (ORCPT ); Mon, 16 Jul 2018 18:32:32 -0400 Received: from cm14.websitewelcome.com (cm14.websitewelcome.com [100.42.49.7]) by gateway21.websitewelcome.com (Postfix) with ESMTP id 76C70400D3D72 for ; Mon, 16 Jul 2018 17:03:07 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id fBaFfbZrMkBj6fBaFfxYCB; Mon, 16 Jul 2018 17:03:07 -0500 X-Authority-Reason: nr=8 Received: from [189.250.65.56] (port=57876 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1ffBaF-002hQi-39; Mon, 16 Jul 2018 17:03:07 -0500 Date: Mon, 16 Jul 2018 17:03:06 -0500 From: "Gustavo A. R. Silva" To: David Howells , Alexander Viro Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] fsinfo: Fix off-by-one bug Message-ID: <20180716220306.GA10773@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: 189.250.65.56 X-Source-L: No X-Exim-ID: 1ffBaF-002hQi-39 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.65.56]:57876 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 3 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The current code reads one element beyond the end of the fsinfo_buffer_sizes array. Fixes: 4e635f61dd55 ("fsinfo: Add a system call to allow querying of filesystem information") Signed-off-by: Gustavo A. R. Silva --- fs/statfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/statfs.c b/fs/statfs.c index 3b8e2700..2a28581 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -791,7 +791,7 @@ SYSCALL_DEFINE5(fsinfo, params.Mth = user_params.Mth; } else { params.at_flags = 0; - params.request = fsinfo_attr_statfs; + params.request = fsinfo_attr_statfs - 1; params.Nth = 0; params.Mth = 0; }