From patchwork Fri Apr 20 13:19:19 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: 10352781 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 EDE5D6023A for ; Fri, 20 Apr 2018 13:43:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE62C285F0 for ; Fri, 20 Apr 2018 13:43:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CEC3328789; Fri, 20 Apr 2018 13:43:40 +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 4A15A2876D for ; Fri, 20 Apr 2018 13:43:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754983AbeDTNnj (ORCPT ); Fri, 20 Apr 2018 09:43:39 -0400 Received: from gateway32.websitewelcome.com ([192.185.145.123]:12667 "EHLO gateway32.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754879AbeDTNnj (ORCPT ); Fri, 20 Apr 2018 09:43:39 -0400 X-Greylist: delayed 1458 seconds by postgrey-1.27 at vger.kernel.org; Fri, 20 Apr 2018 09:43:39 EDT Received: from cm10.websitewelcome.com (cm10.websitewelcome.com [100.42.49.4]) by gateway32.websitewelcome.com (Postfix) with ESMTP id 789E7319EC4 for ; Fri, 20 Apr 2018 08:19:20 -0500 (CDT) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id 9VwefJPi26il39VwefKmGX; Fri, 20 Apr 2018 08:19:20 -0500 X-Authority-Reason: nr=8 Received: from [189.175.6.211] (port=50368 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.89_1) (envelope-from ) id 1f9Vwe-001SdE-2N; Fri, 20 Apr 2018 08:19:20 -0500 Date: Fri, 20 Apr 2018 08:19:19 -0500 From: "Gustavo A. R. Silva" To: Ronnie Sahlberg , Steve French Cc: linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" Subject: [PATCH] cifs: dir: fix memory leak in cifs_mknod Message-ID: <20180420131919.GA1766@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: 189.175.6.211 X-Source-L: No X-Exim-ID: 1f9Vwe-001SdE-2N X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.175.6.211]:50368 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 3 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Free allocated memory for full_path and xid before return. Addresses-Coverity-ID: 1468029 ("Resource leak") Fixes: 49162bfde140 ("cifs: do not allow creating sockets except with SMB1 posix exensions") Signed-off-by: Gustavo A. R. Silva --- fs/cifs/dir.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index f0a759d..71e32d9 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -684,8 +684,11 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, goto mknod_out; } - if (!S_ISCHR(mode) && !S_ISBLK(mode)) + if (!S_ISCHR(mode) && !S_ISBLK(mode)) { + kfree(full_path); + free_xid(xid); return -EPERM; + } if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) goto mknod_out;