@fcrisciani Apply the following patch, and run it on a modern kernel:

diff --git a/bpf_linux.go b/bpf_linux.go
index c6152cd..b8a1b22 100644
--- a/bpf_linux.go
+++ b/bpf_linux.go
@@ -31,9 +31,12 @@ type BPFAttr struct {
 
 // loadSimpleBpf loads a trivial bpf program for testing purposes.
 func loadSimpleBpf(progType BpfProgType, ret uint32) (int, error) {
+       logBuf := make([]byte, 65535)
        insns := []uint64{
                0x00000000000000b7 | (uint64(ret) << 32),
                0x0000000000000095,
        }
        license := []byte{'A', 'S', 'L', '2', '\x00'}
        attr := BPFAttr{
@@ -41,12 +44,16 @@ func loadSimpleBpf(progType BpfProgType, ret uint32) (int, error) {
                InsnCnt:  uint32(len(insns)),
                Insns:    uintptr(unsafe.Pointer(&insns)),
                License:  uintptr(unsafe.Pointer(&license[0])),
+               LogBuf:   uintptr(unsafe.Pointer(&logBuf[0])),
+               LogSize:  uint32(cap(logBuf) - 1),
+               LogLevel: 3,
        }
        fd, _, errno := unix.Syscall(unix.SYS_BPF,
                5, /* bpf cmd */
                uintptr(unsafe.Pointer(&attr)),
                unsafe.Sizeof(attr))
        if errno != 0 {
+               panic(string(logBuf))
                return 0, errno
        }
        return int(fd), nil

The BPF program is hardcoded there (for tests). It appears like the behaviour of the verifier has changed for these programs.

BPF Load Program failing #312

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