From: SeongJae Park <sj@kernel.org>
Cc: SeongJae Park <sj@kernel.org>,
"# 5 . 16 . x" <stable@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
damon@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: [RFC PATCH v1.2 0/2] mm/damon: handle zero {sample,aggr} intervals for DAMOS quota score
Date: Mon, 22 Jun 2026 07:10:23 -0700 [thread overview]
Message-ID: <20260622141027.29145-1-sj@kernel.org> (raw)
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
--
2.47.3
next reply other threads:[~2026-06-22 14:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-22 14:10 SeongJae Park [this message]
2026-06-22 14:10 ` [RFC PATCH v1.2 1/2] mm/damon/core: handle zero intervals in damon_max_nr_accesses() SeongJae Park
2026-06-22 14:10 ` [RFC PATCH v1.2 2/2] mm/damon/ops-common: prevent >DAMON_MAX_SUBSCORE freq_subscore SeongJae Park
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