[Resource Leak] Missing closing files in testing/selftests/vm/mlock2

[Ryan Cai]

Dear Kernel maintainers,
              1. In testing/selftests/vm/mlock2, the file opened at Line 39 may not closed when going to Line 65.
              Location: https://github.com/torvalds/linux/blob/5bfc75d92efd494db37f5c4c173d3639d4772966/tools/testing/selftests/vm/mlock2.h#L37-L49

              Can I send I a patch?

Best,
Ryan