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Tue, 26 Aug 2025 11:36:27 +0800 From: Quanmin Yan To: CC: , , , , , , Subject: [RFC PATCH 0/2] mm/damon: void divide-by-zero in DAMON module's parameters application Date: Tue, 26 Aug 2025 11:36:51 +0800 Message-ID: <20250826033653.1208227-1-yanquanmin1@huawei.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.85.135] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf200018.china.huawei.com (7.185.36.31) X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: AF1C4C000B X-Stat-Signature: eefbj4z6o3bc1rhmueuyrnzchifwxmkx X-HE-Tag: 1756179391-287083 X-HE-Meta: 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 bTEahEK1 fumcQHIUCLl5xn7E1GyEiiDB/Oj61Nh5MPyNwXsXL0Xb9uqUJLmGxG2rLXP51x7F+/BYKKu0UpNYqE6i1Z2Q6yCHs8p6fqrS3f3Kmu28eWRIupMoPmvzHpTrWBXq1KoYhpAYRYfnrJLo5QJVl+1Lxql3GFiwiHE8EiRCM4j5Lvm2mhQs= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. 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