From: SeongJae Park Date: Sat, 1 Nov 2025 18:19:56 +0000 (-0700) Subject: mm/damon/tests/core-kunit: handle allocation failures in damon_test_regions() X-Git-Tag: v6.19-rc1~112^2~172 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e16fdd4f754048d6e23c56bd8d920b71e41e3777;p=thirdparty%2Flinux.git mm/damon/tests/core-kunit: handle allocation failures in damon_test_regions() damon_test_regions() 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/20251101182021.74868-3-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [5.15+] Signed-off-by: Andrew Morton --- diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 69ca44f9270bb..a2c9ee7a5de1a 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -20,11 +20,17 @@ static void damon_test_regions(struct kunit *test) struct damon_target *t; r = damon_new_region(1, 2); + if (!r) + kunit_skip(test, "region alloc fail"); KUNIT_EXPECT_EQ(test, 1ul, r->ar.start); KUNIT_EXPECT_EQ(test, 2ul, r->ar.end); KUNIT_EXPECT_EQ(test, 0u, r->nr_accesses); t = damon_new_target(); + if (!t) { + damon_free_region(r); + kunit_skip(test, "target alloc fail"); + } KUNIT_EXPECT_EQ(test, 0u, damon_nr_regions(t)); damon_add_region(r, t);