z3fold: suspicious return with spinlock held

[Alexey Khoroshilov]

Hello!

z3fold_reclaim_page() contains the only return that may
leave the function with pool->lock spinlock held.

669 	spin_lock(&pool->lock);
670 	if (kref_put(&zhdr->refcount, release_z3fold_page)) {
671 		atomic64_dec(&pool->pages_nr);
672 		return 0;
673 	}

May be we need spin_unlock(&pool->lock); just before return?


Found by Linux Driver Verification project (linuxtesting.org).

--
Thank you,
Alexey Khoroshilov
Linux Verification Center, ISPRAS
web: http://linuxtesting.org