From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Wang <jasowang@redhat.com>
Subject: Re: [PATCH net,stable v2] vhost: fix skb leak in handle_rx()
Date: Wed, 29 Nov 2017 22:43:33 +0800
Message-ID: <6eb987d4-dac1-3da8-a748-11fab1da0100@redhat.com>
References: <1511965404-23289-1-git-send-email-wexu@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Cc: mjrosato@linux.vnet.ibm.com, mst@redhat.com
To: wexu@redhat.com, virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Return-path: <virtualization-bounces@lists.linux-foundation.org>
In-Reply-To: <1511965404-23289-1-git-send-email-wexu@redhat.com>
Content-Language: en-US
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/virtualization/>
List-Post: <mailto:virtualization@lists.linux-foundation.org>
List-Help: <mailto:virtualization-request@lists.linux-foundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=subscribe>
Sender: virtualization-bounces@lists.linux-foundation.org
Errors-To: virtualization-bounces@lists.linux-foundation.org
List-Id: netdev.vger.kernel.org
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