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 55AED330B17 for ; Mon, 5 Jan 2026 11:05:21 +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=1767611121; cv=none; b=o5WEmrhAXY9W0/AiY9M0PMXBbAXUYFnR8sCZuBRyabEVqfSDd9LrRFCMFYIl12+eFYb5A1ghL4LCSXpyKRVg3Dfe6yT1goGiVcCGT7FK3RmsJPr8wPikCJmonWLPKoa5V2okjh91iiDvO4WFZoIr6oIEtZVgnetJ3tUIh07J5t8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767611121; c=relaxed/simple; bh=wv1PoW3tg8gqqOUEHJKudu6AGGnSZVfdzSjfuQDMGeE=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=IlsmQMUz83l88N2H/zG0Zqjw4F8rdjK5cZLzLz9PDA1q39SDNZsjHoLJqr0HqyFrz9vtc/bjCKtF3cE11ICju6OYK3kHGteYJaGqwCizgtK0pdDLQDl2KyfLUGFPRBP410WbGYEZQIP+HAZOA8M+4VZMGwjTpV5kn4eZhSNoiT8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=iV2a2IGv; 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="iV2a2IGv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8B78C116D0; Mon, 5 Jan 2026 11:05:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767611121; bh=wv1PoW3tg8gqqOUEHJKudu6AGGnSZVfdzSjfuQDMGeE=; h=Subject:To:Cc:From:Date:From; b=iV2a2IGv0TMcfWO327Bd23NLMU7d8vlCBI/ffN2TLKuBkSTMHX5F9qqxb2xU3Pfel 2viIzUbxvpj+l6nBr4ddFdj1u4VeaLxMFXqJsg0MTGuY48CRFXT5AsFBWYFIHDCTUf ysGjPY38FqJW2OvO3vRcfPyzkeIziQaHnOX2UbOQ= Subject: FAILED: patch "[PATCH] mm/damon/tests/core-kunit: handle alloc failures on" failed to apply to 6.6-stable tree To: sj@kernel.org,akpm@linux-foundation.org,brendan.higgins@linux.dev,davidgow@google.com,stable@vger.kernel.org,wangkefeng.wang@huawei.com Cc: From: Date: Mon, 05 Jan 2026 12:05:18 +0100 Message-ID: <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-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 3d443dd29a1db7efa587a4bb0c06a497e13ca9e4 # git commit -s git send-email --to '' --in-reply-to '2026010518-overflow-headgear-2f02@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3d443dd29a1db7efa587a4bb0c06a497e13ca9e4 Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Sat, 1 Nov 2025 11:20:00 -0700 Subject: [PATCH] mm/damon/tests/core-kunit: handle alloc failures on damon_test_merge_two() 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 diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index f5f3152cb8df..e8219fd23318 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -188,11 +188,21 @@ 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; r->nr_accesses_bp = 100000; 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; r2->nr_accesses_bp = 200000; damon_add_region(r2, t);