From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754499AbdHDXqG (ORCPT ); Fri, 4 Aug 2017 19:46:06 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:49182 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754053AbdHDX2F (ORCPT ); Fri, 4 Aug 2017 19:28:05 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Steve Wise , Mustafa Ismail , Mike Marciniszyn , Doug Ledford Subject: [PATCH 4.4 37/91] RDMA/uverbs: Fix the check for port number Date: Fri, 4 Aug 2017 16:15:33 -0700 Message-Id: <20170804231557.998344172@linuxfoundation.org> X-Mailer: git-send-email 2.13.4 In-Reply-To: <20170804231555.678888089@linuxfoundation.org> References: <20170804231555.678888089@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ismail, Mustafa commit 5a7a88f1b488e4ee49eb3d5b82612d4d9ffdf2c3 upstream. The port number is only valid if IB_QP_PORT is set in the mask. So only check port number if it is valid to prevent modify_qp from failing due to an invalid port number. Fixes: 5ecce4c9b17b("Check port number supplied by user verbs cmds") Reviewed-by: Steve Wise Signed-off-by: Mustafa Ismail Tested-by: Mike Marciniszyn Signed-off-by: Doug Ledford Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/uverbs_cmd.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -2287,8 +2287,9 @@ ssize_t ib_uverbs_modify_qp(struct ib_uv if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; - if (cmd.port_num < rdma_start_port(ib_dev) || - cmd.port_num > rdma_end_port(ib_dev)) + if ((cmd.attr_mask & IB_QP_PORT) && + (cmd.port_num < rdma_start_port(ib_dev) || + cmd.port_num > rdma_end_port(ib_dev))) return -EINVAL; INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,