From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F964C04AB4 for ; Thu, 16 May 2019 07:47:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C04F2087B for ; Thu, 16 May 2019 07:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726736AbfEPHrw (ORCPT ); Thu, 16 May 2019 03:47:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57004 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726363AbfEPHrw (ORCPT ); Thu, 16 May 2019 03:47:52 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DFD143082B6B; Thu, 16 May 2019 07:47:51 +0000 (UTC) Received: from hp-dl380pg8-02.lab.eng.pek2.redhat.com (hp-dl380pg8-02.lab.eng.pek2.redhat.com [10.73.8.12]) by smtp.corp.redhat.com (Postfix) with ESMTP id 10A8998BB; Thu, 16 May 2019 07:47:44 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: pbonzini@redhat.com, stefanha@redhat.com Subject: [PATCH net 0/4] Prevent vhost kthread from hogging CPU Date: Thu, 16 May 2019 03:47:38 -0400 Message-Id: <1557992862-27320-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Thu, 16 May 2019 07:47:51 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi: This series try to prvernt a guest triggerable CPU hogging through vhost kthread. This is done by introducing and checking the weight after each requrest. The patch has been tested with reproducer of vsock and virtio-net. Only compile test is done for vhost-scsi. Please review. This addresses CVE-2019-3900. Jason Wang (4): vhost: introduce vhost_exceeds_weight() vhost_net: fix possible infinite loop vhost: vsock: add weight support vhost: scsi: add weight support drivers/vhost/net.c | 41 ++++++++++++++--------------------------- drivers/vhost/scsi.c | 21 ++++++++++++++------- drivers/vhost/vhost.c | 20 +++++++++++++++++++- drivers/vhost/vhost.h | 5 ++++- drivers/vhost/vsock.c | 28 +++++++++++++++++++++------- 5 files changed, 72 insertions(+), 43 deletions(-) -- 1.8.3.1