From 7ca5ed830df43c1ea0452d20a9f0cba24e09b695 Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Sat, 1 Nov 2025 11:20:07 -0700 Subject: [PATCH] mm/damon/tests/core-kunit: handle alloc failres in damon_test_new_filter() commit 28ab2265e9422ccd81e4beafc0ace90f78de04c4 upstream. damon_test_new_filter() 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/20251101182021.74868-14-sj@kernel.org Fixes: 2a158e956b98 ("mm/damon/core-test: add a test for damos_new_filter()") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [6.6+] Signed-off-by: Andrew Morton Signed-off-by: SeongJae Park Signed-off-by: Greg Kroah-Hartman --- mm/damon/tests/core-kunit.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index a93761c1bc92..d7737f5df668 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -505,6 +505,8 @@ static void damos_test_new_filter(struct kunit *test) struct damos_filter *filter; filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true); + if (!filter) + kunit_skip(test, "filter alloc fail"); KUNIT_EXPECT_EQ(test, filter->type, DAMOS_FILTER_TYPE_ANON); KUNIT_EXPECT_EQ(test, filter->matching, true); KUNIT_EXPECT_PTR_EQ(test, filter->list.prev, &filter->list);