From 1e88ea25235544a51faa889846f13de88b6e9a2e Mon Sep 17 00:00:00 2001 From: SeongJae Park Date: Sat, 1 Nov 2025 11:20:05 -0700 Subject: [PATCH] mm/damon/tests/core-kunit: handle alloc failures in damon_test_update_monitoring_result() commit 8cf298c01b7fdb08eef5b6b26d0fe98d48134d72 upstream. 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: f4c978b6594b ("mm/damon/core-test: add a test for damon_update_monitoring_results()") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [6.3+] Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- mm/damon/tests/core-kunit.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 2173686f6776f..51051834e1772 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -406,6 +406,9 @@ static void damon_test_update_monitoring_result(struct kunit *test) struct damon_attrs new_attrs; struct damon_region *r = damon_new_region(3, 7); + if (!r) + kunit_skip(test, "region alloc fail"); + r->nr_accesses = 15; r->nr_accesses_bp = 150000; r->age = 20; -- 2.47.3