Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760079AbcLAPeJ (ORCPT ); Thu, 1 Dec 2016 10:34:09 -0500 Received: from p3plsmtps2ded03.prod.phx3.secureserver.net ([208.109.80.60]:38338 "EHLO p3plsmtps2ded03.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759153AbcLAPeD (ORCPT ); Thu, 1 Dec 2016 10:34:03 -0500 x-originating-ip: 72.167.245.219 From: kys@exchange.microsoft.com To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, leann.ogasawara@canonical.com Cc: "K. Y. Srinivasan" Subject: [PATCH 04/15] Drivers: hv: vmbus: Prevent sending data on a rescinded channel Date: Thu, 1 Dec 2016 09:28:41 -0800 Message-Id: <1480613332-7788-4-git-send-email-kys@exchange.microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1480613332-7788-1-git-send-email-kys@exchange.microsoft.com> References: <1480613287-7748-1-git-send-email-kys@exchange.microsoft.com> <1480613332-7788-1-git-send-email-kys@exchange.microsoft.com> Reply-To: kys@microsoft.com X-CMAE-Envelope: MS4wfM9xhNmSGO8n4Xy2mN1ehI3gkb+CxtN5nPQTs4R6TazFAdtQ0ZY0GYNgyhiDoQq9c0GlUhcaTrrJxxl55G6Hsd9sZ+Zs7CaF+DmpMcM7oOmjWl8eTioN I5J4nE6XyHYkuulrWzUWGPH0RdbcYtZkJnoHvt+ZCofHNkuOO6lUXlILDzmK9YLdHN9wdftZ51zK54mpE58Sjgl1z8b+TznSTDUpREhzv54IJtTGuubLfToC Bj17Q/9NqfLQCgZCrHR7KP+MLH20Hlrj9LrBdmcLwGDRc6bBZZ83EKp4OYv+14OzlbdjoCGz37Am8aoxiiN2Ibci8LcMxRWSrAcNKGV0gjwRZI/ycK/dDZKX 8C/sfffLCZsHO0EupRFFAIAgbPLChJEApao18sRTc7qRGO2bbHPz/dKHWGlOj9YZT9n2DymtCh8ODsKItypumhVUuUhKHF2eyzE2fF/u8VzVzyPscD8= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 791 Lines: 25 From: K. Y. Srinivasan After the channel is rescinded, the host does not read from the rescinded channel. Fail writes to a channel that has already been rescinded Signed-off-by: K. Y. Srinivasan --- drivers/hv/ring_buffer.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index cd49cb1..72f649d 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -298,6 +298,9 @@ int hv_ringbuffer_write(struct vmbus_channel *channel, unsigned long flags = 0; struct hv_ring_buffer_info *outring_info = &channel->outbound; + if (channel->rescind) + return -ENODEV; + for (i = 0; i < kv_count; i++) totalbytes_towrite += kv_list[i].iov_len; -- 1.7.4.1