Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  batman-adv: tp_meter: avoid use of uninit sender vars  batadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the BATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it proceeds to read sender-only members that were never initialized, leading to undefined behavior.  This can be triggered when a node that is currently acting as a receiver in an ongoing tp_meter session receives a malicious ACK packet.  Guard against this by checking tp_vars->role immediately after the lookup and bailing out if it is not BATADV_TP_SENDER, before any of those members are accessed.