[Bug 199503] When configuring VLANs inside guests, VLAN traffic is dropped starting with 4.16-rc1

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https://bugzilla.kernel.org/show_bug.cgi?id=199503

--- Comment #4 from dhill@xxxxxxxxxx ---
Hi guys,

       I've hit an issue starting at this commit where I have 2 VMs on 
virbr0 that were communicating using VLANs 201@204 ... This was working 
with kernel 4.15-rc9 and stopped working at kernel 4.16-rc1.   I've 
bisected this issue until this patch here.   I just tried reverting it 
on kernel 4.17-rc2 and I'll try reproducing this issue back again.  I'll 
keep you posted.

Thank you very much,

David Hill


On 2018-04-26 10:30 PM, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=199503
>
> --- Comment #3 from David Hill (hilld@xxxxxxxxxxxxxxx) ---
>
> aff3d70a07fffc0abb53663e4a4acb059d2f36af is the first bad commit
> commit aff3d70a07fffc0abb53663e4a4acb059d2f36af
> Author: Jason Wang <jasowang@xxxxxxxxxx>
> Date:   Tue Jan 16 16:31:02 2018 +0800
>
>      tun: allow to attach ebpf socket filter
>
>      This patch allows userspace to attach eBPF filter to tun. This will
>      allow to implement VM dataplane filtering in a more efficient way
>      compared to cBPF filter by allowing either qemu or libvirt to
>      attach eBPF filter to tun.
>
>      Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
>      Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
>
> :040000 040000 409d4ec37e293589474693c2353fe4b991788f79
> 6838a2daf2dbfd81d6e5c5b438102b70482a0516 M      drivers
> :040000 040000 50b2471f7aef1104feb725c431951df4b5719e75
> 8ad617de12c30e05ec0c6060bb51810dd33af478 M      include
>

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