Re: [dpdk-stable] [dpdk-dev] [PATCH v2] vhost: fix vring message handling broken in some case

[David Marchand <david.marchand@redhat.com>]

On Fri, Nov 15, 2019 at 5:14 AM Tiwei Bie <tiwei.bie@intel.com> wrote:
>
> On Thu, Nov 14, 2019 at 09:52:30AM +0100, Maxime Coquelin wrote:
> > Maybe change the title to something like:
> >
> > vhost: fix vring requests validation broken if no FD in payload

For the title, aligning to backport patches:
"vhost: fix vring requests validation broken if no FD"

> >
> > On 11/13/19 12:03 PM, Zhike Wang wrote:
> > > When VHOST_USER_VRING_NOFD_MASK is set, the fd_num is 0,
> > > so validate_msg_fds() will return error. In this case,
> > > the negotiation of vring message between vhost user front end and
> > > back end would fail, and as a result, vhost user link could NOT be up.
> > >
> > > How to reproduce:
> > > 1.Run dpdk testpmd insides VM, which locates at host with ovs+dpdk.
> > > 2.Notice that inside ovs there are endless logs regarding failure to
> > > handle VHOST_USER_SET_VRING_CALL, and link of vm could NOT be up.
> > >
> > > Fixes: bf47225 ("vhost: fix possible denial of service by leaking FDs")

Fixes: bf472259dde6 ("vhost: fix possible denial of service by leaking FDs")
Cc: stable@dpdk.org


> > > Signed-off-by: Zhike Wang <wangzk320@163.com>
> > > ---
> > >  lib/librte_vhost/vhost_user.c | 13 ++++++++++---
> > >  1 file changed, 10 insertions(+), 3 deletions(-)
> > >
> >
> > otherwise:
> >
> > Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> >
> > The title can be changed while applying if you agree with it, no need to
> > send v3.
> >
> > I'll take care of the different backports.
> >
>
> Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>

Applied, thanks.


-- 
David Marchand