From patchwork Tue Nov 3 15:17:02 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7544651 Return-Path: X-Original-To: patchwork-cifs-client@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 11EC9BEEA4 for ; Tue, 3 Nov 2015 15:49:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5B4FF20515 for ; Tue, 3 Nov 2015 15:49:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 652AB204D2 for ; Tue, 3 Nov 2015 15:49:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932514AbbKCPUk (ORCPT ); Tue, 3 Nov 2015 10:20:40 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59700 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932357AbbKCPUh (ORCPT ); Tue, 3 Nov 2015 10:20:37 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 61E82C10045C; Tue, 3 Nov 2015 15:20:37 +0000 (UTC) Received: from nux.redhat.com (vpn1-5-101.ams2.redhat.com [10.36.5.101]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id tA3FHRZq029477; Tue, 3 Nov 2015 10:20:30 -0500 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , Dave Chinner , linux-ext4@vger.kernel.org, xfs@oss.sgi.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-api@vger.kernel.org Cc: Andreas Gruenbacher Subject: [PATCH v13 26/51] xfs: Plug memory leak in xfs_attrmulti_attr_set Date: Tue, 3 Nov 2015 16:17:02 +0100 Message-Id: <1446563847-14005-27-git-send-email-agruenba@redhat.com> In-Reply-To: <1446563847-14005-1-git-send-email-agruenba@redhat.com> References: <1446563847-14005-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 When setting attributes via XFS_IOC_ATTRMULTI_BY_HANDLE, the user-space buffer is copied into a new kernel-space buffer via memdup_user; that buffer then isn't freed. Signed-off-by: Andreas Gruenbacher Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_ioctl.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index ea7d85a..e939c20 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -482,6 +482,7 @@ xfs_attrmulti_attr_set( __uint32_t flags) { unsigned char *kbuf; + int error; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) return -EPERM; @@ -492,7 +493,9 @@ xfs_attrmulti_attr_set( if (IS_ERR(kbuf)) return PTR_ERR(kbuf); - return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); + error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); + kfree(kbuf); + return error; } int