UBI: fix kmem_cache_free on error patch
'kmem_cache_free()' oopeses if NULL is passed, and there is one error-path place where UBI may call it with NULL object. This problem was pointed to by Adrian Hunter. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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@ -826,7 +826,8 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
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err = schedule_erase(ubi, e1, 0);
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if (err) {
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kmem_cache_free(ubi_wl_entry_slab, e1);
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kmem_cache_free(ubi_wl_entry_slab, e2);
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if (e2)
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kmem_cache_free(ubi_wl_entry_slab, e2);
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goto out_ro;
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}
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