CI tests: kernel panic in the DUT randomly · Issue #581 · intel/cc

A oops in the bridging code handling multicast to implement igmp snooping. IGMP snooping is a feature that looks at join/leave IGMP messages to forward multicast packets to the correct port(s) instead of defaulting to broadcasting.

As a workaround You may want to try disabling CONFIG_BRIDGE_IGMP_SNOOPING at kernel compile time (that's the host creating the bridge) or with sys/devices/virtual/net/brN/bridge/multicast_snooping (needs modification of the docker code?).

The real fix would be to understand where exactly the oops happen by decoding br_multicast_group_expired+0x2a (you can use gdb to load kernel with debug symbol and use "list *br_multicast_group_expired+0x2a"), report it, hunt for patches that could fix this upstream. ...