github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 18:43:33 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_at()

Browse Source 
damon_test_split_at() 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/20251101182021.74868-6-sj@kernel.org
Fixes: 17ccae8bb5 ("mm/damon: add kunit tests")
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>	[5.15+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-11-01 11:19:59 -07:00 committed by Andrew Morton
parent f79f2fc44e
commit 5e80d73f22
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
mm/damon/tests/core-kunit.h
View File

@ -148,8 +148,19 @@ static void damon_test_split_at(struct kunit *test)
struct damon_target *t;
struct damon_region *r, *r_new;
if (!c)
kunit_skip(test, "ctx alloc fail");
t = damon_new_target();
if (!t) {
damon_destroy_ctx(c);
kunit_skip(test, "target alloc fail");
}
r = damon_new_region(0, 100);
if (!r) {
damon_destroy_ctx(c);
damon_free_target(t);
kunit_skip(test, "region alloc fail");
}
r->nr_accesses_bp = 420000;
r->nr_accesses = 42;
r->last_nr_accesses = 15;