[$] A visualizer for BPF program state

The BPF verifier is complicated. It needs to
check every possible path that a
BPF program's execution could take. The fact that its determination of whether a
BPF program is safe is based on the whole lifetime of the program, instead of
simple local factors, means that the cause of a verification
failure is not always obvious. Ihor Solodrai and Jordan Rome gave a presentation
(slides)
at the

2025 Linux Plumbers Conference in Tokyo about
the
BPF verifier visualizer that they have been building
to make diagnosing verification failures easier.