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mm/damon/tests/core-kunit: handle alloc failres in damon_test_new_filter()

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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 <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>	[6.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-11-01 11:20:07 -07:00 committed by Andrew Morton
parent 915a2453d8
commit 28ab2265e9
1 changed files with 2 additions and 0 deletions
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mm/damon/tests/core-kunit.h
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@ -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, false);
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);