unable to write to 9p share

[anatoly techtonik]

I am running under user vagrant/vagrant which has 775 access on the guest directory, but writing to this directory fails with "permission denied". Directory is mounted as

Driver: Path
Mode: Passthrough
Write Policy: Immediate

How to troubleshoot this?

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: libvirt-bin 1.3.1-1ubuntu10
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu May 12 13:54:35 2016
SourcePackage: libvirt
UpgradeStatus: Upgraded to xenial on 2016-04-07 (35 days ago)
modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu.conf']
modified.conffile..etc.libvirt.qemu.networks.default.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu/networks/default.xml']