From patchwork Tue Nov 3 15:17:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7543991 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 30207BEEA4 for ; Tue, 3 Nov 2015 15:28:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5F40420689 for ; Tue, 3 Nov 2015 15:28:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 78697206AF for ; Tue, 3 Nov 2015 15:28:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753192AbbKCPXJ (ORCPT ); Tue, 3 Nov 2015 10:23:09 -0500 Received: from mx1.redhat.com ([209.132.183.28]:54351 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751844AbbKCPXE (ORCPT ); Tue, 3 Nov 2015 10:23:04 -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 3DCD2C0D61B8; Tue, 3 Nov 2015 15:23:04 +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 tA3FHRaD029477; Tue, 3 Nov 2015 10:22:57 -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 47/51] nfs: Fix GETATTR bitmap verification Date: Tue, 3 Nov 2015 16:17:23 +0100 Message-Id: <1446563847-14005-48-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 decoding GETATTR replies, the client checks the attribute bitmap for which attributes the server has sent. It misses bits at the word boundaries, though; fix that. Signed-off-by: Andreas Gruenbacher --- fs/nfs/nfs4xdr.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 788adf3..6f6d921 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -4375,6 +4375,11 @@ static int decode_statfs(struct xdr_stream *xdr, struct nfs_fsstat *fsstat) goto xdr_error; if ((status = decode_attr_files_total(xdr, bitmap, &fsstat->tfiles)) != 0) goto xdr_error; + + status = -EIO; + if (unlikely(bitmap[0])) + goto xdr_error; + if ((status = decode_attr_space_avail(xdr, bitmap, &fsstat->abytes)) != 0) goto xdr_error; if ((status = decode_attr_space_free(xdr, bitmap, &fsstat->fbytes)) != 0) @@ -4574,6 +4579,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; + status = -EIO; + if (unlikely(bitmap[0])) + goto xdr_error; + status = decode_attr_mode(xdr, bitmap, &fmode); if (status < 0) goto xdr_error; @@ -4627,6 +4636,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, goto xdr_error; fattr->valid |= status; + status = -EIO; + if (unlikely(bitmap[1])) + goto xdr_error; + status = decode_attr_mdsthreshold(xdr, bitmap, fattr->mdsthreshold); if (status < 0) goto xdr_error; @@ -4789,12 +4802,22 @@ static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo) if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0) goto xdr_error; fsinfo->wtpref = fsinfo->wtmax; + + status = -EIO; + if (unlikely(bitmap[0])) + goto xdr_error; + status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta); if (status != 0) goto xdr_error; status = decode_attr_pnfstype(xdr, bitmap, &fsinfo->layouttype); if (status != 0) goto xdr_error; + + status = -EIO; + if (unlikely(bitmap[1])) + goto xdr_error; + status = decode_attr_layout_blksize(xdr, bitmap, &fsinfo->blksize); if (status) goto xdr_error;