From: Miaohe Lin <linmiaohe@huawei.com>
Date: Thu, 1 Jul 2021 01:50:36 +0000 (-0700)
Subject: mm/z3fold: fix potential memory leak in z3fold_destroy_pool()
X-Git-Tag: v5.4.132~9
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=49496327c2907eed640684f7058ca8411b67a118;p=users%2Fdwmw2%2Flinux.git

mm/z3fold: fix potential memory leak in z3fold_destroy_pool()

[ Upstream commit dac0d1cfda56472378d330b1b76b9973557a7b1d ]

There is a memory leak in z3fold_destroy_pool() as it forgets to
free_percpu pool->unbuddied.  Call free_percpu for pool->unbuddied to fix
this issue.

Link: https://lkml.kernel.org/r/20210619093151.1492174-6-linmiaohe@huawei.com
Fixes: d30561c56f41 ("z3fold: use per-cpu unbuddied lists")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Hillf Danton <hdanton@sina.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 6d3d3f698ebb9..e97143713021e 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -839,6 +839,7 @@ static void z3fold_destroy_pool(struct z3fold_pool *pool)
 	destroy_workqueue(pool->compact_wq);
 	destroy_workqueue(pool->release_wq);
 	z3fold_unregister_migration(pool);
+	free_percpu(pool->unbuddied);
 	kfree(pool);
 }