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 43E4C2B9BA; Tue, 6 Jan 2026 01:11:24 +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=1767661884; cv=none; b=lxIxupegAJhKwEqgsHS+iN4xljJ4Cc+hswde1wuHmasuAysNW6uLMmUGy8e6Ktpw0L/qOa1TpsltP/oOTJoPp0Zw3+NF3iykGVXEZwJYEOoCk4vGEPjOO+vRfXic2n1JD4yxWa45EjfS8iuHZrqblKhFEaFjkqqh0++K6UR8tfc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767661884; c=relaxed/simple; bh=PAvU1Kx4xGbF0cjgosGw4kTvZZk9bqu7fFhC2vPDYf4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=umxgJk6zhrE5BhUwLiGwvxeBU3Q/KA4bK1dmR8YiJk+C3lxU52EQAHpNcXYV2QDtNwRqDFur4Tc27ORHkuoL8CXSALmQGYoDkpfgostaGpVqLpLuhRKIq5xWzXJoCVTHpFLZSRLPJ0KI2fARWJaQeY9HHdPOZ8g3EFXXcPfmIIU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oYbEgjbo; 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="oYbEgjbo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA08CC116D0; Tue, 6 Jan 2026 01:11:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767661883; bh=PAvU1Kx4xGbF0cjgosGw4kTvZZk9bqu7fFhC2vPDYf4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oYbEgjboVqfV9vG9RTWDGb3ZFil9zEzvBXzY8Y8zaTUzrgRTcGYmesbhENtaisIDS XkBM5nc4KwcMaazdbc0vOGSJ8wRRsTd2xqulWaJ74/7+jOYl0zSAFCrRdecjcbIj0D rfjUq8r3JCRYgGdYMN9sobeQX3CRqHHoLdd6qgoU8qt9ejreAhtJtpMkPKkWK3nG3t Hlc15ZsCSLQZXhDWVqQi9O6cxwczuJFdR6JQxaa6j3oY+GejmbfFLueZtkDCgo18py jabUx8WfpPpu4KJ5bN8pWwnz7kQFa7OvB4SHSMfGUBt5znia4OLjdvIhhDGDlkzoz5 BBz4SoGZCZnwQ== From: SeongJae Park To: stable@vger.kernel.org Cc: damon@lists.linux.dev, SeongJae Park , Brendan Higgins , David Gow , Kefeng Wang , Andrew Morton Subject: [PATCH 6.6.y] mm/damon/tests/core-kunit: handle alloc failures on damon_test_merge_two() Date: Mon, 5 Jan 2026 17:11:15 -0800 Message-ID: <20260106011115.240757-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <2026010518-overflow-headgear-2f02@gregkh> References: <2026010518-overflow-headgear-2f02@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit damon_test_merge_two() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-7-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [5.15+] Signed-off-by: Andrew Morton (cherry picked from commit 3d443dd29a1db7efa587a4bb0c06a497e13ca9e4) --- mm/damon/core-test.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h index 6cc8b245586d..c20f6bd11f36 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -145,10 +145,20 @@ static void damon_test_merge_two(struct kunit *test) int i; t = damon_new_target(); + if (!t) + kunit_skip(test, "target alloc fail"); r = damon_new_region(0, 100); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = 10; damon_add_region(r, t); r2 = damon_new_region(100, 300); + if (!r2) { + damon_free_target(t); + kunit_skip(test, "second region alloc fail"); + } r2->nr_accesses = 20; damon_add_region(r2, t); -- 2.47.3