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 27D573D1CBD; Thu, 15 Jan 2026 17:33:20 +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=1768498400; cv=none; b=oGAe+EFvQ4UmYYEURwML0gDgTKekqiglknZMXvT2aIQDwC3vVMnMm2Kpd9aLVQPTb82hk9+ADabdPJ9y3FemkSGeQ6UWr0IReoGLsSkxJsNvK3chCeS5G1OqY+3AWQzV5F76S5x2N8vKC16vwaVdfNXce6ArLy02xBPjdHesDqw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498400; c=relaxed/simple; bh=ykfN4tidfekWw3xCczzev4MjDHLTeGdMIdEiPmCK0rU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lh5Pb7j7Amt0MqAfZ4tryPTaa8MICNlyUMMlmpIguHIST/z35M0y7YfytHmRGTP3W2rvp28fTAs1JB74HpIM0J9MCa+lob03e0ZJigLL4ZMe2Vo6CJxX0L+FO82lzviAb2IBrPmtEWkgFfgZ6f8h0CclpQbzbGp9eD9Ij1vDcJM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=r8dZ3Jwt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="r8dZ3Jwt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91825C2BC86; Thu, 15 Jan 2026 17:33:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498399; bh=ykfN4tidfekWw3xCczzev4MjDHLTeGdMIdEiPmCK0rU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r8dZ3JwteI2GXm76gx0rREEeTXghiWUBSLq755qpA3WRQ0GI+MsEWURIvyITjWcVP LBSWeJqO43XyquIuTv3i3eJ4xAr1WLUIHPwo9V4zldM6A7HkWOkjvooaDBHo6BMOXS CqcDLrIzormaBW96euHeGQGYpv15TdgTth5GqO6g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, SeongJae Park , Brendan Higgins , David Gow , Kefeng Wang , Andrew Morton Subject: [PATCH 5.15 417/554] mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_at() Date: Thu, 15 Jan 2026 17:48:03 +0100 Message-ID: <20260115164301.335013233@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: SeongJae Park commit 5e80d73f22043c59c8ad36452a3253937ed77955 upstream. damon_test_split_at() 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/20251101182021.74868-6-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: Greg Kroah-Hartman --- mm/damon/core-test.h | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -128,8 +128,19 @@ static void damon_test_split_at(struct k struct damon_target *t; struct damon_region *r; + if (!c) + kunit_skip(test, "ctx alloc fail"); t = damon_new_target(42); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } r = damon_new_region(0, 100); + if (!r) { + damon_destroy_ctx(c); + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } damon_add_region(r, t); damon_split_region_at(c, t, r, 25); KUNIT_EXPECT_EQ(test, r->ar.start, 0ul);