[RFC PATCH v1.2 0/2] mm/damon: handle zero {sample,aggr} intervals for DAMOS quota score

[SeongJae Park <sj@kernel.org>]

When the intervals are zero, divide-by-zero can happen during DAMOS
quota score calculation.  Fixing it alone enables out-of-bound array
access.  Fix those.

Changes from v1
- v1: https://lore.kernel.org/20260621154808.86431-1-sj@kernel.org
- Add out-of-bound array access bug fix as patch 2.
- Add the RFC tag again.
Changes from RFC v1.1
- RFC v1.1: https://lore.kernel.org/20260620171413.89555-1-sj@kernel.org
- Wordsmith commit message.
- Drop RFC tag.
Changes from RFC v1
- RFC v1: https://lore.kernel.org/20260619205144.150664-1-sj@kernel.org
- Handle zero aggr_interval case.

SeongJae Park (2):
  mm/damon/core: handle zero intervals in damon_max_nr_accesses()
  mm/damon/ops-common: prevent >DAMON_MAX_SUBSCORE freq_subscore

 include/linux/damon.h | 8 ++++++--
 mm/damon/ops-common.c | 3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)


base-commit: 42306d32afd75f28e3f13a1259c3b52191b4ff2c
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2.47.3