From patchwork Mon Apr 9 08:06:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ronnie Sahlberg X-Patchwork-Id: 896156 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-cifs-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40KNFN63H6z9s1r for ; Mon, 9 Apr 2018 18:07:20 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752303AbeDIIHR (ORCPT ); Mon, 9 Apr 2018 04:07:17 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:51782 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752272AbeDIIHN (ORCPT ); Mon, 9 Apr 2018 04:07:13 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1224D401CC41; Mon, 9 Apr 2018 08:07:13 +0000 (UTC) Received: from test1190.test.redhat.com (vpn2-54-51.bne.redhat.com [10.64.54.51]) by smtp.corp.redhat.com (Postfix) with ESMTP id C07EE215CDAF; Mon, 9 Apr 2018 08:07:11 +0000 (UTC) From: Ronnie Sahlberg To: linux-cifs Cc: Steve French Subject: [PATCH 05/21] cifs: change validate_buf to validate_iov Date: Mon, 9 Apr 2018 18:06:30 +1000 Message-Id: <20180409080646.23621-6-lsahlber@redhat.com> In-Reply-To: <20180409080646.23621-1-lsahlber@redhat.com> References: <20180409080646.23621-1-lsahlber@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Mon, 09 Apr 2018 08:07:13 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Mon, 09 Apr 2018 08:07:13 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'lsahlber@redhat.com' RCPT:'' Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Signed-off-by: Ronnie Sahlberg Reviewed-by: Pavel Shilovsky --- fs/cifs/smb2pdu.c | 39 +++++++++++++++++++++------------------ 1 file changed, 21 insertions(+), 18 deletions(-) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index dc66b93131f3..42821eeb1095 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2099,13 +2099,13 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, } static int -validate_buf(unsigned int offset, unsigned int buffer_length, - struct smb2_hdr *hdr, unsigned int min_buf_size) - +validate_iov(struct TCP_Server_Info *server, + unsigned int offset, unsigned int buffer_length, + struct kvec *iov, unsigned int min_buf_size) { - unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); - char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; - char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; + unsigned int smb_len = iov->iov_len; + char *end_of_smb = smb_len + server->vals->header_preamble_size + (char *)iov->iov_base; + char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)iov->iov_base; char *end_of_buf = begin_of_buf + buffer_length; @@ -2135,18 +2135,18 @@ validate_buf(unsigned int offset, unsigned int buffer_length, * Caller must free buffer. */ static int -validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, - struct smb2_hdr *hdr, unsigned int minbufsize, +validate_and_copy_iov(struct TCP_Server_Info *server, + unsigned int offset, unsigned int buffer_length, + struct kvec *iov, unsigned int minbufsize, char *data) - { - char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; + char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)(iov->iov_base); int rc; if (!data) return -EINVAL; - rc = validate_buf(offset, buffer_length, hdr, minbufsize); + rc = validate_iov(server, offset, buffer_length, iov, minbufsize); if (rc) return rc; @@ -2224,9 +2224,10 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon, } } - rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), + rc = validate_and_copy_iov(ses->server, + le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), - &rsp->hdr, min_len, *data); + &rsp_iov, min_len, *data); qinf_exit: free_rsp_buf(resp_buftype, rsp); @@ -3147,8 +3148,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, goto qdir_exit; } - rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), - le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + rc = validate_iov(server, + le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, info_buf_size); if (rc) goto qdir_exit; @@ -3520,8 +3522,9 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size + le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); - rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), - le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, + rc = validate_iov(server, + le16_to_cpu(rsp->OutputBufferOffset), + le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, sizeof(struct smb2_fs_full_size_info)); if (!rc) copy_fs_info_to_kstatfs(info, fsdata); @@ -3577,7 +3580,7 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, rsp_len = le32_to_cpu(rsp->OutputBufferLength); offset = le16_to_cpu(rsp->OutputBufferOffset); - rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len); + rc = validate_iov(server, offset, rsp_len, &rsp_iov, min_len); if (rc) goto qfsattr_exit;