[PATCH] net/vhost: fix null pointer dereference

[Ma, WenwuX]

> -----Original Message-----
> From: Luca Boccassi <bluca at debian.org>
> Sent: 2022年8月5日 23:09
> To: Ma, WenwuX <wenwux.ma at intel.com>
> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>; Xia, Chenbo
> <chenbo.xia at intel.com>; dpdk stable <stable at dpdk.org>; Hu, Jiayu
> <jiayu.hu at intel.com>; Wang, Yinan <yinan.wang at intel.com>; He, Xingguang
> <xingguang.he at intel.com>
> Subject: Re: [PATCH] net/vhost: fix null pointer dereference
> 
> On Fri, 2022-08-05 at 10:12 +0000, Ma, WenwuX wrote:
> >
> > > -----Original Message-----
> > > From: Luca Boccassi <luca.boccassi at gmail.com>
> > > Sent: 2022年8月5日 18:04
> > > To: Ma, WenwuX <wenwux.ma at intel.com>
> > > Cc: Maxime Coquelin <maxime.coquelin at redhat.com>; Xia, Chenbo
> > > <chenbo.xia at intel.com>; dpdk stable <stable at dpdk.org>; Hu, Jiayu
> > > <jiayu.hu at intel.com>; Wang, Yinan <yinan.wang at intel.com>; He,
> > > Xingguang <xingguang.he at intel.com>
> > > Subject: Re: [PATCH] net/vhost: fix null pointer dereference
> > >
> > > On Fri, 5 Aug 2022 at 03:22, Wenwu Ma <wenwux.ma at intel.com> wrote:
> > > >
> > > > Because the async member of the vhost_virtqueue struct can be
> > > > freed in controlpath, so it should be protected by spinlock in
> > > > datapath, or, it may cause null pointer dereference in the
> > > > following vhost_poll_enqueue_completed().
> > > >
> > > > Fixes: b737fd613969 ("vhost: add unsafe async API to clear
> > > > packets")
> > > >
> > > > Signed-off-by: Wenwu Ma <wenwux.ma at intel.com>
> > > > ---
> > > >  lib/vhost/virtio_net.c | 12 +++++++++---
> > > >  1 file changed, 9 insertions(+), 3 deletions(-)
> > >
> > > Hi,
> > >
> > > Is this for a stable branch? If so, which one? Please use
> > > --subject-prefix next time to clearly identify it.
> > >
> > Sorry, it is 21.11
> 
> Does this issue affect only 21.11? Or main as well?
> 
Only 21.11
> --
> Kind regards,
> Luca Boccassi