mm/vma04: new testcase

vma04: corner cases for mbind vma merge issue

There are several corner cases (documented in mm/mmap.c) for mbind
vma merge issue, which makes commit 8aacc9f550 slightly incorrect.
KOSAKI Motohiro made a patch for it (commit e26a511) and composed
a reproducer containing these corner cases. Now I port it to LTP.

Signed-off-by: Caspar Zhang <caspar@casparzhang.com>
2 files changed