From: Tong Zhu <zhutong@xxxxxxxxxx> Date: Wed, 30 Dec 2020 17:54:23 -0500 > In 4.x kernel a dst in DST_OBSOLETE_DEAD state is associated > with loopback net_device and leads to loopback neighbour. It > leads to an ethernet header with all zero addresses. > > A very troubling case is working with mac80211 and ath9k. > A packet with all zero source MAC address to mac80211 will > eventually fail ieee80211_find_sta_by_ifaddr in ath9k (xmit.c). > As result, ath9k flushes tx queue (ath_tx_complete_aggr) without > updating baw (block ack window), damages baw logic and disables > transmission. > > Signed-off-by: Tong Zhu <zhutong@xxxxxxxxxx> Please repost with an appropriate Fixes: tag. Thanks.
