diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 74480809be7681f7159a8228b8b9c3f6094316d4..7e5d4ac800d9461cdd75baea54dd90c48d82a41e 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -303,8 +303,10 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
 		kfree(zone);
 		ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,
 					     logical >> PAGE_CACHE_SHIFT, 1);
-		if (ret == 1)
+		if (ret == 1 && logical >= zone->start && logical <= zone->end)
 			kref_get(&zone->refcnt);
+		else
+			zone = NULL;
 	}
 	spin_unlock(&fs_info->reada_lock);