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 0471A2745C for ; Tue, 6 Jan 2026 01:36:59 +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=1767663420; cv=none; b=BXY5vhVT9wyCRalcnLs6dKqiSmwGS93abEM2cUPH+DHaslgWGOUX9xZAnMMJtHtiwP0t7lu7H9nPetrBrTOKrZsWhBsqE8SCe0Yn3dcndxUCJxYsrMpZw/DHQbuRFVNskDMYHCUvAlNKZVOH5z4ircUmQGrZz1ZoZLXz4jEMKsw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767663420; c=relaxed/simple; bh=z234rUsySNn+WI1q9IzsFlyobUfwVT0nhmadgIFWIv8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pv9LEOoSq/QagwgiFKqvNJSpm6EgYjnCZ1aLF73D9jHSbeiwecvXECf9KTUObHHrtfEEKgm337mOlLk3tobS+NHyW3ZqcrnFZync0hNRXVx3rQb4+ElLg0q1W+owrUN2CcmsjZODuqeb7CPwAXB2FswUNFdLlpnI9FVrTblUzVA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i+MGAmMW; 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="i+MGAmMW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D30B7C116D0; Tue, 6 Jan 2026 01:36:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767663419; bh=z234rUsySNn+WI1q9IzsFlyobUfwVT0nhmadgIFWIv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i+MGAmMW9eAdnLFy3GnYAO9TKLTOEDklVl6I6cSKqr7QPKSh5b/2/wpXarehGtLko H22PUK0FJDP11jZyvN6ji+egPu4aa9EnT4RtkLMrI27kqxyRAWZ4lkPYsZP34BRIeu hHQ5NjMDa66xlfA9C0fKYvJfM0J2kDK/VPfu2urp6Wpu2mwkVsBN2nDmq3Z6DfUfBN wVAm3J4L1E+ayfSNlD/3F3v0aIB3COfglrUvO+LoeWw+ATYunrX7OF8WxskCkX2/Qd 0arVYvJEl6X4a6EdzAffAkrNHZeQXwdhMMX8RhOBlQEhC6ARNu+01VS6FNeRD6x89s MoU1BH44HKi/g== From: Sasha Levin To: stable@vger.kernel.org Cc: SeongJae Park , Brendan Higgins , David Gow , Kefeng Wang , Andrew Morton , Sasha Levin Subject: [PATCH 6.1.y] mm/damon/tests/core-kunit: handle memory failure from damon_test_target() Date: Mon, 5 Jan 2026 20:36:56 -0500 Message-ID: <20260106013656.2887979-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <2026010535-convent-enigmatic-f417@gregkh> References: <2026010535-convent-enigmatic-f417@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: SeongJae Park [ Upstream commit fafe953de2c661907c94055a2497c6b8dbfd26f3 ] damon_test_target() 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/20251101182021.74868-4-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 Signed-off-by: Sasha Levin --- mm/damon/core-test.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h index 3db9b7368756..3f0773dc2ead 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -52,7 +52,14 @@ static void damon_test_target(struct kunit *test) struct damon_ctx *c = damon_new_ctx(); struct damon_target *t; + if (!c) + kunit_skip(test, "ctx alloc fail"); + t = damon_new_target(); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } KUNIT_EXPECT_EQ(test, 0u, nr_damon_targets(c)); damon_add_target(c, t); -- 2.51.0