CVE-2024-40981 batman-adv: bypass empty buckets in batadv_purge_orig_ref()

In the Linux kernel, the following vulnerability has been resolved: batman-adv: bypass empty buckets in batadvpurgeorigref Many syzbot reports are pointing to soft lockups in batadvpurgeorigref 1 Root cause is unknown, but we can avoid spending too much time there and perhaps get more interesting...