From 9c47f9159220b1d1dbd6a1ff72c39762d6a8e912 Mon Sep 17 00:00:00 2001 From: Jinjie Ruan Date: Thu, 10 Oct 2024 20:53:23 +0800 Subject: [PATCH] mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets() BugLink: https://bugs.launchpad.net/bugs/2097393 commit 2d6a1c835685de3b0c8e8dc871f60f4ef92ab01a upstream. The sysfs_target->regions allocated in damon_sysfs_regions_alloc() is not freed in damon_sysfs_test_add_targets(), which cause the following memory leak, free it to fix it. unreferenced object 0xffffff80c2a8db80 (size 96): comm "kunit_try_catch", pid 187, jiffies 4294894363 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 0): [<0000000001e3714d>] kmemleak_alloc+0x34/0x40 [<000000008e6835c1>] __kmalloc_cache_noprof+0x26c/0x2f4 [<000000001286d9f8>] damon_sysfs_test_add_targets+0x1cc/0x738 [<0000000032ef8f77>] kunit_try_run_case+0x13c/0x3ac [<00000000f3edea23>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000adf936cf>] kthread+0x2e8/0x374 [<0000000041bb1628>] ret_from_fork+0x10/0x20 Link: https://lkml.kernel.org/r/20241010125323.3127187-1-ruanjinjie@huawei.com Fixes: b8ee5575f763 ("mm/damon/sysfs-test: add a unit test for damon_sysfs_set_targets()") Signed-off-by: Jinjie Ruan Reviewed-by: SeongJae Park Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman Signed-off-by: Manuel Diewald Signed-off-by: Koichiro Den --- mm/damon/sysfs-test.h | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/damon/sysfs-test.h b/mm/damon/sysfs-test.h index 73bdce2452c1..6091d0b3618a 100644 --- a/mm/damon/sysfs-test.h +++ b/mm/damon/sysfs-test.h @@ -67,6 +67,7 @@ static void damon_sysfs_test_set_targets(struct kunit *test) damon_destroy_ctx(ctx); kfree(sysfs_targets->targets_arr); kfree(sysfs_targets); + kfree(sysfs_target->regions); kfree(sysfs_target); }