From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 230D8352077; Tue, 26 Aug 2025 14:36:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756218984; cv=none; b=dY9GtLIVlM+Ndn+Gg8d29FwmGyOWICZu6oHTuAT8gtRGGa8F8qfi7Ri4lOKROSTqAeUhN9u7vB+L9tnmeQmhO5sWT2pytRmINBqa6VnyWFPTcHFXkq20g3Hq5IfEc/f4YAP6VKMH1/yickEWKRVl+gKd27RvdbVa7pVxXEjJKTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756218984; c=relaxed/simple; bh=cm3c4GhML4E6RLlw/VFFFI6QieoD1VhZ+qpko2GXjyQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=rCwsHpdSWmW7H2yH5BNshr8KSi9CjoQBwSTSxb5HPNto31+IoM5TAxROG8Ry3rv/2f9eCDffW4wfo5hymyF2uOdNeev9pEyORHybACvwExa0cLG4eA+HX6oryLDVXYgqyKUsdfrHh1cG1J+77uKwvz2gYhMHAEOUhSK5tOAMNys= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ayhHbx5X; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ayhHbx5X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C286FC4CEF1; Tue, 26 Aug 2025 14:36:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756218983; bh=cm3c4GhML4E6RLlw/VFFFI6QieoD1VhZ+qpko2GXjyQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ayhHbx5XdlTVbBQ83nz6wO1nSS9vqlStNZOOG4jTgJgJDS3VtRKhdkP7ZLrRpWPaT JB5ee9SGB2pMIarQFFwO7fifRY1djZycI6TrkVkSDCwqxbkH0Q7NuBBLYnWdnWCT0a fW8fMzjMky/bJjZLQM9Ov/3pXgAlzNv6Q/9NmqTKgdY0dk+8RFJx6s1KVfEXqATzd+ QJgN6H7qIlZmqy2y5YspLoUP6ZQiJFR9DMjyA7hlZfUS83FUbZWCsYKIfY767lQfzT RmjLh2JzIjKVAfaGeZbzRaW8s7y5iagKdA7GkXnZm7Kq6rpWS2VOBUTwIeAIlmHtUN q9O3WJBQauSgA== From: SeongJae Park To: Quanmin Yan Cc: SeongJae Park , akpm@linux-foundation.org, damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, wangkefeng.wang@huawei.com, zuoze1@huawei.com Subject: Re: [RFC PATCH 0/2] mm/damon: void divide-by-zero in DAMON module's parameters application Date: Tue, 26 Aug 2025 07:36:22 -0700 Message-Id: <20250826143622.54331-1-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250826033653.1208227-1-yanquanmin1@huawei.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 26 Aug 2025 11:36:51 +0800 Quanmin Yan wrote: > 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. Thank you for finding and fixing these problems, Quanmin! All looks good, though I think it would be better to add 'Cc: stable@' tags to each patch. Thanks, SJ [...]