linux-kernel - [PATCH 0/2] mm/damon: void divide-by-zero in DAMON module's parameters application

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Message-ID: <20250827115858.1186261-1-yanquanmin1@huawei.com>
Date: Wed, 27 Aug 2025 19:58:56 +0800
From: Quanmin Yan <yanquanmin1@...wei.com>
To: <sj@...nel.org>
CC: <akpm@...ux-foundation.org>, <damon@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<yanquanmin1@...wei.com>, <wangkefeng.wang@...wei.com>, <zuoze1@...wei.com>
Subject: [PATCH 0/2] mm/damon: void divide-by-zero in DAMON module's parameters application

DAMON's RECLAIM or LRU_SORT modules perform no validation on
user-configured parameters during application, which may lead
to division-by-zero errors.

Avoid the divide-by-zero by adding validation checks when DAMON
modules attempt to apply the parameters.

Changes from RFC v1
(https://lore.kernel.org/all/20250826033653.1208227-1-yanquanmin1@huawei.com/)
- No code changes.
  - Drop RFC tag.
  - Add 'Cc: stable@' tags to each patch.

Quanmin Yan (2):
  mm/damon/lru_sort: avoid divide-by-zero in
    damon_lru_sort_apply_parameters()
  mm/damon/reclaim: avoid divide-by-zero in
    damon_reclaim_apply_parameters()

 mm/damon/lru_sort.c | 5 +++++
 mm/damon/reclaim.c  | 5 +++++
 2 files changed, 10 insertions(+)

-- 
2.43.0