damon_test_set_filters_default_reject() 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.
Fixes: 094fb14913c7 ("mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject()") Cc: stable@vger.kernel.org # 6.16.x Signed-off-by: SeongJae Park sj@kernel.org --- mm/damon/tests/core-kunit.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index a03ae9ddd88a..a91d798caa70 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -659,6 +659,8 @@ static void damon_test_set_filters_default_reject(struct kunit *test) KUNIT_EXPECT_EQ(test, scheme.ops_filters_default_reject, false);
target_filter = damos_new_filter(DAMOS_FILTER_TYPE_TARGET, true, true); + if (!target_filter) + kunit_skip(test, "filter alloc fail"); damos_add_filter(&scheme, target_filter); damos_set_filters_default_reject(&scheme); /* @@ -684,6 +686,10 @@ static void damon_test_set_filters_default_reject(struct kunit *test) KUNIT_EXPECT_EQ(test, scheme.ops_filters_default_reject, false);
anon_filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, true); + if (!anon_filter) { + damos_free_filter(target_filter); + kunit_skip(test, "anon_filter alloc fail"); + } damos_add_filter(&scheme, anon_filter);
damos_set_filters_default_reject(&scheme);