The patch titled Subject: mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets() has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-damon-fix-memory-leak-in-damon_sysfs_test_add_targets.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Jinjie Ruan ruanjinjie@huawei.com Subject: mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets() Date: Thu, 10 Oct 2024 20:53:23 +0800

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 ruanjinjie@huawei.com Reviewed-by: SeongJae Park sj@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/damon/tests/sysfs-kunit.h | 1 + 1 file changed, 1 insertion(+)

--- a/mm/damon/tests/sysfs-kunit.h~mm-damon-fix-memory-leak-in-damon_sysfs_test_add_targets +++ a/mm/damon/tests/sysfs-kunit.h @@ -67,6 +67,7 @@ static void damon_sysfs_test_add_targets damon_destroy_ctx(ctx); kfree(sysfs_targets->targets_arr); kfree(sysfs_targets); + kfree(sysfs_target->regions); kfree(sysfs_target); }

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Patches currently in -mm which might be from ruanjinjie@huawei.com are

mm-damon-fix-memory-leak-in-damon_sysfs_test_add_targets.patch