From nobody Mon Apr 6 12:18:39 2026 Received: from sender-of-o55.zoho.eu (sender-of-o55.zoho.eu [136.143.169.55]) (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 CF2113EC2E1 for ; Thu, 19 Mar 2026 16:16:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.169.55 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773937006; cv=pass; b=Hh5mziNNvypCRfZ6irUVqz690eUxxJnk/dWSn3qu4O0O1clXzJjdTcTG+7moEL+NbAKIR+nZaKt0pp/imwcI+CKJOYmE+dOcGDAVI1gIduNWgr3iPO7U5ssncKo+dTTPl3aYFx1SCzPB3VrUkxkZFcasO9xlENnlA0+bP4DhDuo= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773937006; c=relaxed/simple; bh=iwymhH/m9Py0cGUVWLndn+DBf0fQjyXOlUYWwZOaY80=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=sLF9iX5bFDjlNgbUZOPhEeSuGM6cVNn52FeyDwU67E6Wz6f2kH3OKYu//tSkTgF9uwazrkauPPLJE2AaAEjCtjHAEnvUPs5NPH60bsXdaQl6ls2w0BIdGn3pS/SmYQ3/JefXYeuBjVNADIt70ShwymYQ3YlUQs3yWJQFwZlM+SE= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=objecting.org; spf=pass smtp.mailfrom=objecting.org; dkim=pass (1024-bit key) header.d=objecting.org header.i=objecting@objecting.org header.b=PZ1EAUfN; arc=pass smtp.client-ip=136.143.169.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=objecting.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=objecting.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=objecting.org header.i=objecting@objecting.org header.b="PZ1EAUfN" ARC-Seal: i=1; a=rsa-sha256; t=1773936984; cv=none; d=zohomail.eu; s=zohoarc; b=YtQ+n5adLWRhRlwMN/ButLVqI0ZbmvaM4gIG/cxPAIns1uVOQeOzWKZXRGp8VlENj/JNDx2sseAgMMmdXvRH58iiFRtgcnNImUH+HWs9OYrkYw2/ocDaCLbtnD5siUZ0uTztyznh65ajAGVffP2ib7MQfb77yi9sW89teajhSJA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1773936984; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=kSzfJu51IfOy1UEq0KOHRM7ctnyUfpNOAlgbFOZRhU8=; b=i4OEJ4irdtfNq67p49ZvD/NSOBuDo0sKHHeBAMzbko+Ov6MmRMddMlGwx2xy4hjXKG3xZV+lx9unCeP82ArIy6gq+XVyRXo4v6XbDuyf4CS9lLdT7BjSjVP77uHKRXLnvyr2ESoZOQyTuphUkGQVk1eHbu+b1SQJK6N9H3ylouM= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=objecting.org; spf=pass smtp.mailfrom=objecting@objecting.org; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1773936984; s=zmail; d=objecting.org; i=objecting@objecting.org; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-Id:Message-Id:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Reply-To; bh=kSzfJu51IfOy1UEq0KOHRM7ctnyUfpNOAlgbFOZRhU8=; b=PZ1EAUfNuAt4xkB14D2sffseN1vgACG0eDvUu8GwDycAxeSJFtCCc0+pnD7cg7ja bZcNE7w3uJM1eb8Rsv1Wy460xJ1nUE4XoPYPC9njngndvZKQuj7jcyuHDmgySU6z20+ Aay50qDM0MVv/Vn+XKFpbCrLcHR/9FpHXkmwTiqs= Received: by mx.zoho.eu with SMTPS id 177393698328213.931315546403994; Thu, 19 Mar 2026 17:16:23 +0100 (CET) From: Josh Law To: sj@kernel.org, akpm@linux-foundation.org Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Josh Law Subject: [PATCH 2/2] mm/damon/reclaim: fix min_age_region truncation from unsigned long to unsigned int Date: Thu, 19 Mar 2026 16:16:20 +0000 Message-Id: <20260319161620.189392-3-objecting@objecting.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260319161620.189392-1-objecting@objecting.org> References: <20260319161620.189392-1-objecting@objecting.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" min_age / aggr_interval can exceed UINT_MAX with extreme but valid module parameter values, silently truncating min_age_region and lowering the cold-page age threshold below what the user intended. Clamp the result to UINT_MAX to match the field's type. Signed-off-by: Josh Law Reviewed-by: SeongJae Park --- mm/damon/reclaim.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index 9b55df304e51..303c64a56073 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -170,8 +170,8 @@ static struct damos *damon_reclaim_new_scheme(void) .min_nr_accesses =3D 0, .max_nr_accesses =3D 0, /* for min_age or more micro-seconds */ - .min_age_region =3D min_age / - damon_reclaim_mon_attrs.aggr_interval, + .min_age_region =3D min_t(unsigned long, min_age / + damon_reclaim_mon_attrs.aggr_interval, UINT_MAX), .max_age_region =3D UINT_MAX, }; =20 --=20 2.34.1