From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 4.12 166/196] RDMA/uverbs: Fix the check for port number Date: Tue, 25 Jul 2017 12:22:45 -0700 Message-Id: <20170725192054.291496830@linuxfoundation.org> In-Reply-To: <20170725192046.422343510@linuxfoundation.org> References: <20170725192046.422343510@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.12-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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -1931,7 +1931,8 @@ static int modify_qp(struct ib_uverbs_fi goto out; } - if (!rdma_is_port_valid(qp->device, cmd->base.port_num)) { + if ((cmd->base.attr_mask & IB_QP_PORT) && + !rdma_is_port_valid(qp->device, cmd->base.port_num)) { ret = -EINVAL; goto release_qp; }