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 3AA4713FEE; Tue, 6 Jan 2026 02:36:49 +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=1767667009; cv=none; b=D+b4p4Qkz9q6o80AWdh0BOI6jlHHuSM+dDzu87douaJALMHGOUczayEqJwyc9pAvuBY3SKIupdQoDA2/Wx9slyaHoEliVBBXLGvetvyGiGgTkrQbiLjQaZPs++yNANJ8Xen3craa6d30s+kjBRYLwb2gD9nepywFsKoYYDXLZvM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767667009; c=relaxed/simple; bh=K77vRF2z+F2191owBGhkkmPoUEORvLNRHqWeHgS/rhU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fShXTxr4a9q2BHZObWumxUK7Wlhlj1QLGgMP9XLw2JHt+Z8nepIiGVudmvE75llj1Ay87vdZaHrfkImHjvceVoeXA0RbYyDwizX3yrCaFWQwcQeB8NHEQoB+zYYoUBbr+chFfnKpgZr8eVWM4LFL2Cngr6DPssD+S1bwwzst8u8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fIHVkDeb; 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="fIHVkDeb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D54D9C116D0; Tue, 6 Jan 2026 02:36:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767667009; bh=K77vRF2z+F2191owBGhkkmPoUEORvLNRHqWeHgS/rhU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fIHVkDebqn6yQccrm8IyK1y9Y1RsyfiKBetDMZOS8oOzp0tLqTJI7F0fzmQbhB5kI Uv/toRdGlYmGKOyaGh61l8tC6wWsy6g/TqVmVYm4NHM9qGlYeqMJsg9lNNkg4u163Z frGtTCHaNXa2fntLMsdiBdziPF6fOVam92tcLRstj+nuQ8eCn+0RNGQ9GgKRBla8be 7beG7OVMDKuJVoVgM2sgmwUEOSg6oz8URcnY+/QKukokcnfhy8ZGwlPYtgskFWkx31 VYsAGrwqj9oFaqGq8Q/0fXLKOvmS+g7YjWiA2SnCaRLZpqGlzSeDY7N+/QzzIuPCC4 47tZGAqCO7eTQ== 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 6.1.y] mm/damon/tests/core-kunit: handle alloc failures on dasmon_test_merge_regions_of() Date: Mon, 5 Jan 2026 18:36:41 -0800 Message-ID: <20260106023641.765797-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <2026010500-endurance-wobble-1a3c@gregkh> References: <2026010500-endurance-wobble-1a3c@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_regions_of() 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/20251101182021.74868-8-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 0998d2757218771c59d5ca59ccf13d1542a38f17) Signed-off-by: SeongJae Park --- mm/damon/core-test.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h index 3db9b7368756..a61697029d74 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -193,8 +193,14 @@ static void damon_test_merge_regions_of(struct kunit *test) int i; t = damon_new_target(); + if (!t) + kunit_skip(test, "target alloc fail"); for (i = 0; i < ARRAY_SIZE(sa); i++) { r = damon_new_region(sa[i], ea[i]); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = nrs[i]; damon_add_region(r, t); } -- 2.47.3