From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Coquelin Subject: Re: [PATCH v2] vhost: fix corner case for enqueue operation Date: Thu, 27 Sep 2018 20:34:22 +0200 Message-ID: <885a7cfc-7ac6-a4a5-f9ca-641eb6241e3d@redhat.com> References: <1536305094-126439-1-git-send-email-jiayu.hu@intel.com> <1537156482-46428-1-git-send-email-jiayu.hu@intel.com> <47f35e9f-a211-5eb5-b2e9-23145f44d1bc@redhat.com> <310219be-daa2-eb06-fc02-1e76784a01f4@redhat.com> <16033cbd-ea29-bff8-3822-769b05642b93@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: tiwei.bie@intel.com, zhihong.wang@intel.com, Gavin.Hu@arm.com, "stable@dpdk.org" To: Kevin Traynor , Jiayu Hu , dev@dpdk.org Return-path: In-Reply-To: <16033cbd-ea29-bff8-3822-769b05642b93@redhat.com> Content-Language: en-US List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 09/27/2018 08:05 PM, Kevin Traynor wrote: > On 09/27/2018 01:37 PM, Maxime Coquelin wrote: >> >> >> On 09/27/2018 02:24 PM, Maxime Coquelin wrote: >>> >>> >>> On 09/17/2018 05:54 AM, Jiayu Hu wrote: >>>> When perform enqueue operations on the split and packed ring, >>> s/perform/performing/ >>> s/ring/rings/ >>>> if the reserved buffer length from the descriptor table execeeds >>>> 65535, the returned length by fill_vec_buf_split/_packed() is >>>> overflowed. This patch is to avoid this corner case. >>> s/overflowed/overflows/ >>>> >>>> Fixes: f689586b ("vhost: shadow used ring update") >>>> Fixes: fd68b473 ("vhost: use buffer vectors in dequeue path") >>>> Fixes: 2f3225a7 ("vhost: add vector filling support for packed ring") >>>> Fixes: 37f5e79a ("vhost: add shadow used ring support for packed rings") >>>> Fixes: a922401f ("vhost: add Rx support for packed ring") >>>> Fixes: ae999ce4 ("vhost: add Tx support for packed ring") >>>> > > It breaks the record for number of Fixes? :-) This is exhaustive! :) > > I think relevant for stables also - any reason why not? Forgot to mention, but I added it while applying. FYI, it targets v18.08. >>>> Signed-off-by: Jiayu Hu >>>> --- >>>> lib/librte_vhost/virtio_net.c | 20 +++++++++++--------- >>>> 1 file changed, 11 insertions(+), 9 deletions(-) >>>> >>> >>> Other than that, the patch looks good to me. Thanks for fixing it. >>> >>> Reviewed-by: Maxime Coquelin >>> >>> Maxime >> >> Applied to dpdk-next-virtio/master with commit message fix. >> >> Thanks, >> Maxime >