[dpdk-stable] [16.11 LTS PATCH v2] vhost: fix vring requests validation broken if no FD

[Luca Boccassi]

On Fri, 2019-11-15 at 20:24 +0800, Tiwei Bie wrote:
> On Fri, Nov 15, 2019 at 11:36:15AM +0100, Maxime Coquelin wrote:
> > From: Zhike Wang <
> > wangzk320 at 163.com
> > >
> > 
> > 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: 1bf11cfb7c7c ("vhost: fix possible denial of service by
> > leaking FDs")
> > Cc: 
> > stable at dpdk.org
> > 
> > 
> > Signed-off-by: Zhike Wang <
> > wangzk320 at 163.com
> > >
> > Reviewed-by: Maxime Coquelin <
> > maxime.coquelin at redhat.com
> > >
> > ---
> >  lib/librte_vhost/vhost_user.c | 13 ++++++++++---
> >  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> Reviewed-by: Tiwei Bie <
> tiwei.bie at intel.com
> >
> 
> Thanks!
> Tiwei

Thanks, applied

-- 
Kind regards,
Luca Boccassi