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 3F76D328B41 for ; Mon, 5 Jan 2026 11:04:57 +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=1767611097; cv=none; b=OMTf1CNhQAg/SUySashAEVct34hPxs+ooBJ+2V8tjidoDGvIG/4bsAciyHZSeI71LTOZfx0qhLSplutseV1pglJVYfUm9lUgmz1YxVI7N2cgbbmQgSSb+LAEhX1GqDeOvLRwAPwhjS3mvjI9QeX7wwQRuUQOcSxFBBIkqPgRqFc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767611097; c=relaxed/simple; bh=EmEvA1QDHm7ie5/gdxpt6MQIhbVQlBKoCR5+6tJ0NH0=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=K2HZB7a+shmDaK01o+8vsEuRPD0H0h+c8Hk8aswD7L3UF34qtagVPm5JoQFUzt+IRoPGYwDfahhmfQMP2NiZdPTRTrYMVbxMouotiNOdBW4lvWnLdmD8qYzxc47Si9ZspZcHDs8qkgWfeujsWZajLc5LyT1Zkw4Su5YutNH4pCM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rT6323PU; 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="rT6323PU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13881C19421; Mon, 5 Jan 2026 11:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767611096; bh=EmEvA1QDHm7ie5/gdxpt6MQIhbVQlBKoCR5+6tJ0NH0=; h=Subject:To:Cc:From:Date:From; b=rT6323PUk4agxeMBflukxSsNb5XzlfW5z/fJmTlm43FSFHNGnbx9rirkfCCaaIj3O XAreHtEgX7fm9sNXGltE6a1t2W94i/AVAtGOd2Ct/+ZYgyL9moQkUthwU7TpC253kl Zs31hhgiGkOISp1FYMKZ9k3Q6UTUuzu9Nt3QDn+0= Subject: FAILED: patch "[PATCH] mm/damon/tests/core-kunit: handle memory alloc failure from" failed to apply to 6.1-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 12:04:46 +0100 Message-ID: <2026010546-myspace-powdering-7f2b@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 6.1-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-6.1.y git checkout FETCH_HEAD git cherry-pick -x f79f2fc44ebd0ed655239046be3e80e8804b5545 # git commit -s git send-email --to '' --in-reply-to '2026010546-myspace-powdering-7f2b@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From f79f2fc44ebd0ed655239046be3e80e8804b5545 Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Sat, 1 Nov 2025 11:19:58 -0700 Subject: [PATCH] mm/damon/tests/core-kunit: handle memory alloc failure from damon_test_aggregate() damon_test_aggregate() 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/20251101182021.74868-5-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 6e8a605277a3..fd1e1ecaa2c9 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -97,8 +97,15 @@ static void damon_test_aggregate(struct kunit *test) struct damon_region *r; int it, ir; + if (!ctx) + kunit_skip(test, "ctx alloc fail"); + for (it = 0; it < 3; it++) { t = damon_new_target(); + if (!t) { + damon_destroy_ctx(ctx); + kunit_skip(test, "target alloc fail"); + } damon_add_target(ctx, t); } @@ -106,6 +113,10 @@ static void damon_test_aggregate(struct kunit *test) damon_for_each_target(t, ctx) { for (ir = 0; ir < 3; ir++) { r = damon_new_region(saddr[it][ir], eaddr[it][ir]); + if (!r) { + damon_destroy_ctx(ctx); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = accesses[it][ir]; r->nr_accesses_bp = accesses[it][ir] * 10000; damon_add_region(r, t);