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 4F5FF13B284; Tue, 6 Jan 2026 02:27:31 +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=1767666451; cv=none; b=pO5NT3V33b7qkDDYcm3ZSaU8PGMQTwEGIsb6d42QNWzDTfobwI1Hijs+KZBCtB7DoSvceS5SbgcmZyk+AcK0qF8FAnvQn43CjIPqAxTdD6UMZsGQ6z8Hql5mYF6Av/MOHHzpXX0pIQvtKClY424wChkBGLw4uIls8YnLU+qbtBs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767666451; c=relaxed/simple; bh=Fg2amvf7jYsIVYZtImXqwSmgtUUhbqhI3het9cDc4js=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uCVicyDig2dyuJQ2uPOSkABNQQjh1CEq1wu9crLf0N6I2QkLLEtbLMVtuPEesp0UnHpIHnt9lSWB3xpesac+uxgs3rq1idzT/xoYThDYBQT3jflFebx8D0JitR3bASd467aKMhvE0OSglK3IuFuhWEFD+2s6N1kFJl8PO4kI/xc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bn8ZF/at; 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="bn8ZF/at" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC61DC116D0; Tue, 6 Jan 2026 02:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767666450; bh=Fg2amvf7jYsIVYZtImXqwSmgtUUhbqhI3het9cDc4js=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bn8ZF/atkkUq/fJxEFW6dFaYKDpC2QIvNbNTMxTAdRSsoOulNUaqXRxxAizZTbCbq 3iLbJMU6erJk/iCRokCDxw1TueKAHYxYdrQOP3EO+V0ojAbuJt2stkdbqSDKsm+c/S mR40mcf8oEW5vjF7a1C621gBGxRoCI93skAB0JJIczZmbv8zezjQh9K0BnjI9wVcV9 a0NFGhjIoO4dqUbZvDfFdBrQwuAKK+weqH7A+4pEkUj7UoVUsQYCZHwHG3fFdlk9aH iuGChzmdvj3GiucwKjfFLwxbR9rvaKXngvsp1/i+aP4oJyBWQbMabhYQxMFI1O50z5 MsVdjpN4I/ZXQ== 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 5.15.y] mm/damon/tests/core-kunit: handle alloc failures on damon_test_merge_two() Date: Mon, 5 Jan 2026 18:27:22 -0800 Message-ID: <20260106022722.707215-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <2026010519-cathedral-cuddle-c32b@gregkh> References: <2026010519-cathedral-cuddle-c32b@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) Signed-off-by: SeongJae Park --- 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 7008c3735e99..d22c86d5148b 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -144,10 +144,20 @@ static void damon_test_merge_two(struct kunit *test) int i; t = damon_new_target(42); + 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