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mm/damon/tests/core-kunit: handle alloc failures in damon_test_update_monitoring_result() 

damon_test_update_monitoring_result() 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/20251101182021.74868-12-sj@kernel.org
Fixes: f4c978b659 ("mm/damon/core-test: add a test for damon_update_monitoring_results()")
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>	[6.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-11-01 11:20:05 -07:00 committed by Andrew Morton
parent 74d5969995
commit 8cf298c01b
1 changed files with 3 additions and 0 deletions
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3
mm/damon/tests/core-kunit.h
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@ -429,6 +429,9 @@ static void damon_test_update_monitoring_result(struct kunit *test)
struct damon_attrs new_attrs; struct damon_attrs new_attrs;
struct damon_region *r = damon_new_region(3, 7); struct damon_region *r = damon_new_region(3, 7);
if (!r)
kunit_skip(test, "region alloc fail");
r->nr_accesses = 15; r->nr_accesses = 15;
r->nr_accesses_bp = 150000; r->nr_accesses_bp = 150000;
r->age = 20; r->age = 20;