Re: BUG_ON in skb_segment, after bpf_skb_change_proto was applied

On Tue, 27 Aug 2019 14:10:35 +0200
Daniel Borkmann [off-list ref] wrote:

Given first point above wrt hitting rarely, it would be good to first get a
better understanding for writing a reproducer. Back then Yonghong added one
to the BPF kernel test suite [0], so it would be desirable to extend it for
the case you're hitting. Given NAT64 use-case is needed and used by multiple
parties, we should try to (fully) fix it generically.

Thanks Daniel for the advice.

I'm working on a reproducer that resembles the input skb which triggers
this BUG_ON.