From: SeongJae Park Date: Sat, 1 Nov 2025 18:20:03 +0000 (-0700) Subject: mm/damon/tests/core-kunit: handle alloc failures in damon_test_ops_registration() X-Git-Tag: v6.6.120~12 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c45dcf86c75eef78456f01e4705572ada5ced754;p=thirdparty%2Fkernel%2Fstable.git mm/damon/tests/core-kunit: handle alloc failures in damon_test_ops_registration() commit 4f835f4e8c863985f15abd69db033c2f66546094 upstream. damon_test_ops_registration() 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/20251101182021.74868-10-sj@kernel.org Fixes: 4f540f5ab4f2 ("mm/damon/core-test: add a kunit test case for ops registration") Signed-off-by: SeongJae Park Cc: Brendan Higgins Cc: David Gow Cc: Kefeng Wang Cc: [5.19+] Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h index e71d50f0a2dfb..d714fe76e35db 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -308,6 +308,9 @@ static void damon_test_ops_registration(struct kunit *test) struct damon_ctx *c = damon_new_ctx(); struct damon_operations ops, bak; + if (!c) + kunit_skip(test, "ctx alloc fail"); + /* DAMON_OPS_{V,P}ADDR are registered on subsys_initcall */ KUNIT_EXPECT_EQ(test, damon_select_ops(c, DAMON_OPS_VADDR), 0); KUNIT_EXPECT_EQ(test, damon_select_ops(c, DAMON_OPS_PADDR), 0);