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 5EC20F9C0; Thu, 4 Sep 2025 00:11:38 +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=1756944699; cv=none; b=NGGWDCDAaTkH8geb+DXG6vAavzRUh0HhhBm+lDt/oPXmA80RJGvZJmuH885b604bB2cyfQv7V1Jyk5PbJ/z9u1X8BV8NPGT/9UyF+Q9Z/b28aQjpoONDKUcJHyYXUJn+6X4q7koPn461qIHh/NVO4770IDFeD0Xu/JY4G3vKOgM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756944699; c=relaxed/simple; bh=1+7k2/XhPZq7zcjjKCFl8oJd35TzLIFffzxg/nI2L0c=; h=Date:To:From:Subject:Message-Id; b=BqyB1u8PbuPpqRkPhc9mLsXu6gJpGf8k6KbuhYRM2nK1tLEkHYv+hDHKJECmyBpCAeY6l0gd/BuW6iqgweLhpAVuR4gOUX+sF8wLPomwGOJ3EOC3ESlnD8W+z07Z+MrSdlIj4sn/XDmTtfMJhLxSOvzJ6rpYAFgw5Ry09CboeH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=U0EeSccK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="U0EeSccK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FC78C4CEF5; Thu, 4 Sep 2025 00:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1756944698; bh=1+7k2/XhPZq7zcjjKCFl8oJd35TzLIFffzxg/nI2L0c=; h=Date:To:From:Subject:From; b=U0EeSccKOwmqXKD3dRsOE3Y2xb3mF/lKS9Ddb+kWJsxU4g0N0UyIuTdqxi667JpDo c6NL92s/takrsjkq/eddkgHEpixI54OIM9rUi/ARYzjg68gjAp9qAg+UXR6n+ITqmu AT374icBix1xj7JFKcc3CViHmBMhFkh2Q7fES46Q= Date: Wed, 03 Sep 2025 17:11:37 -0700 To: mm-commits@vger.kernel.org,zuoze1@huawei.com,wangkefeng.wang@huawei.com,stable@vger.kernel.org,sj@kernel.org,yanquanmin1@huawei.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-hotfixes-stable] mm-damon-lru_sort-avoid-divide-by-zero-in-damon_lru_sort_apply_parameters.patch removed from -mm tree Message-Id: <20250904001138.0FC78C4CEF5@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters() has been removed from the -mm tree. Its filename was mm-damon-lru_sort-avoid-divide-by-zero-in-damon_lru_sort_apply_parameters.patch This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Quanmin Yan Subject: mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters() Date: Wed, 27 Aug 2025 19:58:57 +0800 Patch series "mm/damon: avoid divide-by-zero in DAMON module's parameters application". DAMON's RECLAIM and 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. This patch (of 2): During the calculation of 'hot_thres' and 'cold_thres', either 'sample_interval' or 'aggr_interval' is used as the divisor, which may lead to division-by-zero errors. Fix it by directly returning -EINVAL when such a case occurs. Additionally, since 'aggr_interval' is already required to be set no smaller than 'sample_interval' in damon_set_attrs(), only the case where 'sample_interval' is zero needs to be checked. Link: https://lkml.kernel.org/r/20250827115858.1186261-2-yanquanmin1@huawei.com Fixes: 40e983cca927 ("mm/damon: introduce DAMON-based LRU-lists Sorting") Signed-off-by: Quanmin Yan Reviewed-by: SeongJae Park Cc: Kefeng Wang Cc: ze zuo Cc: [6.0+] Signed-off-by: Andrew Morton --- mm/damon/lru_sort.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/mm/damon/lru_sort.c~mm-damon-lru_sort-avoid-divide-by-zero-in-damon_lru_sort_apply_parameters +++ a/mm/damon/lru_sort.c @@ -198,6 +198,11 @@ static int damon_lru_sort_apply_paramete if (err) return err; + if (!damon_lru_sort_mon_attrs.sample_interval) { + err = -EINVAL; + goto out; + } + err = damon_set_attrs(ctx, &damon_lru_sort_mon_attrs); if (err) goto out; _ Patches currently in -mm which might be from yanquanmin1@huawei.com are mm-damon-add-damon_ctx-min_sz_region.patch