Hi Florian a user from Bananapi-forum has reported the oops and i had reproduced this and patched out this oops. That means not that vlan in bridge works, only no crash.
my kernel only conatins the second gmac dsa-patches for mt7530/bpi-r2 i've posted at the end of last year, but the oops also occur without them. have not changed bridge vlan-configuration by echo 1 > /sys/class/net/bridge_name/bridge/vlan_filtering maybe that vlan-objects/configuration is not passed through, but there should happen no oops. kernel-source is here: https://github.com/frank-w/BPI-R2-4.14/tree/4.19-main ps: please take me in CC so i can answer directly regards Frank