Linux version 4.9.120 (buildbot@builds-03.infra.lede-project.org) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r7102-3f3a2c9) ) #0 Thu Aug 16 07:51:15 2018
MIPS: machine is TP-LINK Archer C7 v4
[1376349.962969] ------------[ cut here ]------------
[1376349.968002] WARNING: CPU: 0 PID: 11380 at backports-2017-11-01/net/mac80211/ieee80211_i.h:1412 0x87604ca4 [mac80211@87600000+0x5fb00]
[1376349.980575] Modules linked in: ath9k ath9k_common pppoe ppp_async ath9k_hw ath10k_pci ath10k_core ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables gpio_button_hotplug
[1376350.042697] CPU: 0 PID: 11380 Comm: hostapd Not tainted 4.9.120 #0
[1376350.049373] Stack : 80497672 00000036 00000000 00000001 00000000 00000000 00000000 00000000
[1376350.058285] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[1376350.067235] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[1376350.076105] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[1376350.084985] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[1376350.093937] ...
[1376350.096651] Call Trace:
[1376350.099230] [<8006ad5c>] 0x8006ad5c
[1376350.103017] [<8006ad5c>] 0x8006ad5c
[1376350.106797] [<8007fd44>] 0x8007fd44
[1376350.110663] [<87604ca4>] 0x87604ca4 [mac80211@87600000+0x5fb00]
[1376350.116984] [<8007fde0>] 0x8007fde0
[1376350.120769] [<87604ca4>] 0x87604ca4 [mac80211@87600000+0x5fb00]
[1376350.127087] [<8761e61c>] 0x8761e61c [mac80211@87600000+0x5fb00]
[1376350.133435] [<802d9028>] 0x802d9028
[1376350.137255] [<87559f1c>] 0x87559f1c [cfg80211@87540000+0x30f30]
[1376350.143569] [<802abbdc>] 0x802abbdc
[1376350.147389] [<87fde89c>] 0x87fde89c [compat@87fde000+0x1260]
[1376350.153486] [<802da880>] 0x802da880
[1376350.157294] [<8009ce50>] 0x8009ce50
[1376350.161087] [<802da59c>] 0x802da59c
[1376350.164943] [<802d9980>] 0x802d9980
[1376350.168748] [<80111584>] 0x80111584
[1376350.172534] [<802da584>] 0x802da584
[1376350.176320] [<802d91f8>] 0x802d91f8
[1376350.180113] [<80297454>] 0x80297454
[1376350.183901] [<802d975c>] 0x802d975c
[1376350.187685] [<801de8e0>] 0x801de8e0
[1376350.191459] [<8029bd18>] 0x8029bd18
[1376350.195281] [<8028cb44>] 0x8028cb44
[1376350.199079] [<8028de1c>] 0x8028de1c
[1376350.202862] [<800fb538>] 0x800fb538
[1376350.206644] [<80071120>] 0x80071120
[1376350.210443] [<8028ed38>] 0x8028ed38
[1376350.214312] [<8006f48c>] 0x8006f48c
[1376350.218112]
[1376350.219827] ---[ end trace 313dc1399ddff519 ]---
Full dmesg at: https://paste.ubuntu.com/p/Fd6dqwjZFk/