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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 04B8BC10F13 for ; Thu, 11 Apr 2019 05:46:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD93520850 for ; Thu, 11 Apr 2019 05:46:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726864AbfDKFqa (ORCPT ); Thu, 11 Apr 2019 01:46:30 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:52374 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726684AbfDKFq3 (ORCPT ); Thu, 11 Apr 2019 01:46:29 -0400 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::d71]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 0DE1714C8DE31; Wed, 10 Apr 2019 22:46:29 -0700 (PDT) Date: Wed, 10 Apr 2019 22:46:28 -0700 (PDT) Message-Id: <20190410.224628.1651735622261723310.davem@davemloft.net> To: jasowang@redhat.com Cc: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net] vhost: reject zero size iova range From: David Miller In-Reply-To: <20190409041025.20922-1-jasowang@redhat.com> References: <20190409041025.20922-1-jasowang@redhat.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 10 Apr 2019 22:46:29 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Tue, 9 Apr 2019 12:10:25 +0800 > We used to accept zero size iova range which will lead a infinite loop > in translate_desc(). Fixing this by failing the request in this case. > > Reported-by: syzbot+d21e6e297322a900c128@syzkaller.appspotmail.com > Fixes: 6b1e6cc7 ("vhost: new device IOTLB API") > Signed-off-by: Jason Wang Applied and queued up for -stable.