Merge branch 'sockmap-ulp-fixes'

Daniel Borkmann says:

====================
Batch of various fixes related to BPF sockmap and ULP, including
adding module alias to restrict module requests, races and memory
leaks in sockmap code. For details please refer to the individual
patches. Thanks!
====================

Signed-off-by: Alexei Starovoitov <[email protected]>