From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752667AbeCZQ7g (ORCPT ); Mon, 26 Mar 2018 12:59:36 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:53296 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751692AbeCZQ7e (ORCPT ); Mon, 26 Mar 2018 12:59:34 -0400 Date: Mon, 26 Mar 2018 12:59:33 -0400 (EDT) Message-Id: <20180326.125933.76259382836188471.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_net: add missing lock nesting notation From: David Miller In-Reply-To: <1522051823-5166-1-git-send-email-jasowang@redhat.com> References: <1522051823-5166-1-git-send-email-jasowang@redhat.com> X-Mailer: Mew version 6.7 on Emacs 25.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Wang Date: Mon, 26 Mar 2018 16:10:23 +0800 > We try to hold TX virtqueue mutex in vhost_net_rx_peek_head_len() > after RX virtqueue mutex is held in handle_rx(). This requires an > appropriate lock nesting notation to calm down deadlock detector. > > Fixes: 0308813724606 ("vhost_net: basic polling support") > Reported-by: syzbot+7f073540b1384a614e09@syzkaller.appspotmail.com > Signed-off-by: Jason Wang Applied and queued up for -stable, thanks Jason.