The patch "z3fold: add kref refcounting" introduced a bug in
z3fold_reclaim_page() with function exit that may leave pool->lock
spinlock held. Here comes the trivial fix.
Reported-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Signed-off-by: Vitaly Wool <vitalywool@xxxxxxxxx>
---
mm/z3fold.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/z3fold.c b/mm/z3fold.c
index 8970a2f..f9492bc 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -667,6 +667,7 @@ static int z3fold_reclaim_page(struct z3fold_pool *pool, unsigned int retries)
z3fold_page_unlock(zhdr);
spin_lock(&pool->lock);
if (kref_put(&zhdr->refcount, release_z3fold_page)) {
+ spin_unlock(&pool->lock);
atomic64_dec(&pool->pages_nr);
return 0;
}
--
2.5.0
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