[RFC PATCH v1.1 0/7] mm/damon: fix uninitialized DAMOS field and kunit exec expectation bugs

[SJ Park]

Fix a few Sashiko-found unurgent bugs.  Patch 1 fixes use of
uninitialized damos->last_applied field.  Patches 2-7 fix DAMON kunit
tests that do invalid memory access under test failures.

The bugs are better to be fixed and eventually merged into stable@
kernel.  That said, the fixes are arguably not urgent.  Patch 1 only
introduces negligible DAMOS efficiency degradation in occasional
cases.  Kunit fixes could introduce quite bad consequences but those
are test code that affect only test run setups.

Changes from RFC
- RFC: https://lore.kernel.org/20260717003022.119437-1-sj@xxxxxxxxxx
- Add missed region split failure check in filter_out() test.
- Rebase to latest mm-new.

SJ Park (7):
  mm/damon/core: initialize damos->last_applied
  mm/damon/core-kunit: check region count before testing in split_at()
  mm/damon/vaddr-kunit: check region count in three_regions test
  mm/damon/core-kunit: handle region split failure in filter_out()
  mm/damon/core-kunit: skip wrong dest walk in commit_dests_for()
  mm/damon/core-kunit: skip wrong quota goal walk in
    commit_quota_goals()
  mm/damon/core-kunit: skip wrong region walk in commit_target_regions()

 mm/damon/core.c              |  1 +
 mm/damon/tests/core-kunit.h  | 30 ++++++++++++++++++++++++++++--
 mm/damon/tests/vaddr-kunit.h |  5 +++++
 3 files changed, 34 insertions(+), 2 deletions(-)


base-commit: 0ad94b65c75dc6c6c3fa742f0a6213ed578c771a
-- 
2.47.3