From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 9619E2DCC1F; Sun, 2 Aug 2026 16:20:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785687657; cv=none; b=kq/du0nKFZrpQt0s6EBZBQ4z6wuq9Mra8qYe3z4srOk9yloi6LQX64buxB459FmiO7ZRp+gCGozVhaC4h0rNQoyQIyBbKqNEO5Z1epBTojTk2h/IZKOd7A1rH1/ZbJjAWVA2/0jx4SybwsloFF1CqSlsqs7a1eHCdUcJj2P1TJg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785687657; c=relaxed/simple; bh=Q0v6oBqJnprpCl+GF3KlPsvL0/dRSIqa6WHx4vAGg8A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=J52F8nFOvAy7YelCLp/2EU7R8DWtS4heTLNYkzho7NbSLh8MMVxqpZma08cn8m3U/y4oEvtgMuXPITnOO6Qv1PEsEGT1yq2xQZNOK7sdrAq8VWulXGbsROTTUoxaRWxyi85IKWmfU/CTiPdXtovxQsLPJR/qFoV6Cne5qmLcB8w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bG91hedU; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bG91hedU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E741A1F000E9; Sun, 2 Aug 2026 16:20:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785687656; bh=EeL7EexGcxVGO5VVZMxodiz3XY6WPJZIVBQfHZICIwc=; h=From:To:Cc:Subject:Date; b=bG91hedURWN2K+cf8RTj9098FPlOiDM3pFA4pF4o9OqjQSzKnJlqpUec9dClXUI7f vz/pbyNwzPuxDMrXz6BWtN/Bt7H6T3z8TITa3iCpAIrzA/yGjfjxHzt4U/etzF+j82 8MfyAQ7GROCmZL4KUXISbFvR+4Me9ctLRpYkhRQ8Vvs9T/Nxn1ZgjjdhsOv652G3iI y6gX3Yk1RiI2nzNm+hbakReUPqNT4DBj34Mozabv5WaTj676sIYbDOQJ9A14mCYbnk AE/WG2rjb+Z3e1xgnHKQ0oEQFs02lPT51cmUV3MQfMrNdtnbr5M/2A+idcDFUt/X+J N6JmLNZpHoTgA== From: SJ Park To: Cc: SJ Park , stable@vger.kernel.org, Andrew Morton , Yunjeong Mun , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 0/2] mm/damon: avoid division by zero from damos_quota_score() Date: Sun, 2 Aug 2026 09:20:47 -0700 Message-ID: <20260802162050.89477-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit DAMON_SAMPLE_MTIER and DAMON_LRU_SORT allow the user to trigger division by zero in damos_quota_score(). Avoid it by adding parameters validation checks. Changes from RFC - RFC: https://lore.kernel.org/20260801211315.2456-1-sj@kernel.org - Add a fix for DAMON_LRU_SORT. SJ Park (2): samples/damon/mtier: error out for zero quota goal target values mm/damon/lru_sort: error out for >10000 active_mem_bp mm/damon/lru_sort.c | 2 ++ samples/damon/mtier.c | 3 +++ 2 files changed, 5 insertions(+) base-commit: 51d61cb34d137b13957ce83455c1f596d39e8cfe -- 2.47.3