On Thu, Apr 09, 2020 at 10:42:23AM +0200, Paolo Pisati wrote: > test_maps fails consistently on x86-64 5.4.y (5.4.31 and defconfig + > tools/testing/selftests/bpf/config in this case) and dumps this output: > > ~/linux/tools/testing/selftests/bpf$ sudo ./test_maps > libbpf: Error loading BTF: Invalid argument(22) > libbpf: magic: 0xeb9f > libbpf: Error loading .BTF into kernel: -22. > libbpf: Error loading BTF: Invalid argument(22) > libbpf: magic: 0xeb9f > > libbpf: Error loading .BTF into kernel: -22. > Failed to load SK_SKB verdict prog I've been trying to reproduce on the latest bpf tree and couldn't. Does it reproduce for you on the latest?