From patchwork Fri May 17 08:12:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 10947479 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 402E713AD for ; Fri, 17 May 2019 08:12:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2828020500 for ; Fri, 17 May 2019 08:12:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 196E0212D8; Fri, 17 May 2019 08:12:41 +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 9BE3B20500 for ; Fri, 17 May 2019 08:12:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728704AbfEQIMg (ORCPT ); Fri, 17 May 2019 04:12:36 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:38196 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727624AbfEQIMf (ORCPT ); Fri, 17 May 2019 04:12:35 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1hRXyj-0004tg-LP; Fri, 17 May 2019 08:12:33 +0000 From: Colin King To: Steve French , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cifs: fix memory leak of pneg_inbuf on -EOPNOTSUPP ioctl case Date: Fri, 17 May 2019 09:12:33 +0100 Message-Id: <20190517081233.11764-1-colin.king@canonical.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 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 From: Colin Ian King Currently in the case where SMB2_ioctl returns the -EOPNOTSUPP error there is a memory leak of pneg_inbuf. Fix this by returning via the out_free_inbuf exit path that will perform the relevant kfree. Addresses-Coverity: ("Resource leak") Fixes: 969ae8e8d4ee ("cifs: Accept validate negotiate if server return NT_STATUS_NOT_SUPPORTED") Signed-off-by: Colin Ian King --- fs/cifs/smb2pdu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 710ceb875161..5b8d1482ffbd 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1054,7 +1054,8 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) * not supported error. Client should accept it. */ cifs_dbg(VFS, "Server does not support validate negotiate\n"); - return 0; + rc = 0; + goto out_free_inbuf; } else if (rc != 0) { cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); rc = -EIO;