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 stable@vger.kernel.org.

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 915a2453d824a9b6bf724e3f970d86ae1d092a61 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2026010552-thickness-copper-cc49@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 915a2453d824a9b6bf724e3f970d86ae1d092a61 Mon Sep 17 00:00:00 2001 From: SeongJae Park sj@kernel.org Date: Sat, 1 Nov 2025 11:20:06 -0700 Subject: [PATCH] mm/damon/tests/core-kunit: handle alloc failure on damon_test_set_attrs()

damon_test_set_attrs() 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/20251101182021.74868-13-sj@kernel.org Fixes: aa13779be6b7 ("mm/damon/core-test: add a test for damon_set_attrs()") Signed-off-by: SeongJae Park sj@kernel.org Cc: Brendan Higgins brendan.higgins@linux.dev Cc: David Gow davidgow@google.com Cc: Kefeng Wang wangkefeng.wang@huawei.com Cc: stable@vger.kernel.org [6.5+] Signed-off-by: Andrew Morton akpm@linux-foundation.org

diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 10c9953581ee..b9bd69a57e62 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -465,6 +465,9 @@ static void damon_test_set_attrs(struct kunit *test) .sample_interval = 5000, .aggr_interval = 100000,}; struct damon_attrs invalid_attrs;

+ if (!c) + kunit_skip(test, "ctx alloc fail"); + KUNIT_EXPECT_EQ(test, damon_set_attrs(c, &valid_attrs), 0);

invalid_attrs = valid_attrs;