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 EA64638DC5F; Wed, 2 Sep 2026 05:47:55 +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=1788328077; cv=none; b=F2dkD/e4e6fhPU3fUZ/+pa5HHnGIvNWPgPObpBEYH2EWpVjtkpy1gsDdlAo9f6E5g/rWaftzeWd54chFKXYr1Ak16sqEaaYDr1XZMbVmB+p7k1Le6ewpKSQtOzIE19Rb4wNyoM9ipATPJK8hLTXT3KQuQmHGrN4ps7hURaVuELE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788328077; c=relaxed/simple; bh=Nvdizo8PsCsBXGtfZpWwiTQ5zJFcYq/b002rCuTt2RM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AEmd0EKCHGQlJVirI/NT/cs7Di1rrAveA8uHbzuL4S+BehBcObDovmGoACH4gFfdlBWs73iUHPayFGj9JHNS0hDF9LPfm5bV8yMtJ4PJMMuEzV3KQ2KP83g9LlX9LXwLGfXIMewEKrYRTfp9LHxecJSdk9zMH8nDY8O8Ohb3D9s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OaOrtRB3; 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="OaOrtRB3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A29401F00A3E; Wed, 2 Sep 2026 05:47:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788328075; bh=KapXeO7OndJodgXvsAPTUdwLTA5ybEOS8WtNM8GGre0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=OaOrtRB31+vdvxxaQTsVcdtksSf8AUVnGY2FQ1ubJilAVPbuppVruEKp/YmmPB1Lw +oEr8eQ/dJtc7TCCvA3rXvhnc/cWsS8UEsPNwFlQ6l/qoCIWnZQ3ZmJl0gG3dMglqN BfocpI59IRFjL4DyCB4CrWqtrDWYNWhDqQgGwXorFOKLIUHgvyj9Kv60UHD9emSOzE 4gjQkBncrHHdsT/V1ImAcw2RlxWVCP4SOLfiJOgFqDxkHnmKpGK3N8a3eyrGvgg4DR ZvuTyHdMvOblzcqAKbIn5wH9bZT/B9T2Q8LHB4YVnhtuyzv0iZPlE9YYIt/ezsFVSh pDf2isDehJetw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 04/12] mm/damon/core: validate number of probes in valid_probe_params() Date: Tue, 1 Sep 2026 22:47:37 -0700 Message-ID: <20260902054747.99370-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260902054747.99370-1-sj@kernel.org> References: <20260902054747.99370-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Each DAMON context is allowed to have only up to DAMON_MAX_PROBES probes. The central place for validating DAMON probe parameters, damon_valid_probe_params(), is not validating the upper limit, though. Do the validation. Signed-off-by: SJ Park --- mm/damon/core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index 4d28eb033fc4a..c010f686d033e 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1420,6 +1420,13 @@ static bool damon_valid_probe_params(struct damon_ctx *ctx) unsigned char max_probe_hits; struct damon_probe *probe; unsigned int wsum, wsum_to_add; + int nr_probes; + + nr_probes = 0; + damon_for_each_probe(probe, ctx) + nr_probes++; + if (nr_probes > DAMON_MAX_PROBES) + return false; if (!damon_has_probe_weights(ctx)) return true; -- 2.47.3