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Subject[PATCH 5.4 341/348] mm/z3fold: fix potential memory leak in z3fold_destroy_pool()
Date
From: Miaohe Lin <linmiaohe@huawei.com>

[ 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>
---
mm/z3fold.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 6d3d3f698ebb..e97143713021 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);
}

--
2.30.2


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