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Wed, 27 Aug 2025 19:58:35 +0800 From: Quanmin Yan To: CC: , , , , , , Subject: [PATCH 0/2] mm/damon: void divide-by-zero in DAMON module's parameters application Date: Wed, 27 Aug 2025 19:58:56 +0800 Message-ID: <20250827115858.1186261-1-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: kwepems100001.china.huawei.com (7.221.188.238) To dggpemf200018.china.huawei.com (7.185.36.31) X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: 86477100010 X-Stat-Signature: xpmno68tn8j8ai6bntxehyrorioe36qz X-HE-Tag: 1756295921-196029 X-HE-Meta: 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 0/pCc2ZD 4ECFB/3DN1JwEzeM5n+NiCSIyZ3oRI4sbd479PRXCEp5VRHZLsbJ3w/TAhdun2nYhUtcLUDNnmmgrqjPu8RPvEYVfMoqMwasUBKRikIAAjh5Rt5uAc+sMOb9zJdJRxke09JXJ5V9vCQ4kUKswELRpCF/HmYtPBy5d+oFQ2NPcaCMfVvqcnkLhMuoJgbMLr7ptaXzsvNUQ/Rr/1xEbq7BlRuMF7EkX4/OKVTrzXxMCdezFoWhuFCDi76IeZ9JTHbfAVYHv 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. 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