Merge branch 'bpf-fixes'

Alexei Starovoitov says:

====================
bpf fixes

Fixes for two bpf bugs:
1st bug reported by Sasha Goldshtein here:
https://github.com/iovisor/bcc/issues/570
2nd discovered by Daniel Borkmann by manual code analysis.
See patches for details.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>