AR750S-Ext (Slate) WiFi AP Dropouts / Kernel Oops

fowl · 2020-06-22T06:35:01.968Z

Hi all,

I’m using my device in AP mode (wired) and have noticed the network will just disappear until I reboot the device. Seems to happen with hours to days of uptime.

I’ve got two SSIDs configured, one 2.4g+5g that’s and another that’s 5g only.

Firmware 3.104 / OpenWrt 18.06.1 r7258-5eb055306f / LuCI openwrt-18.06 branch (git-18.196.56128-9112198)

Any info I can provide to help troubleshoot please let me know.

PS. is it normal for the CPU usage to go up to >2 just browsing around luci?

Logs:

Sun Jun 21 02:42:52 2020 kern.warn kernel: [79924.676067] ath10k_pci 0000:00:00.0: bss channel survey timed out
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.716076] ath10k_pci 0000:00:00.0: failed to delete peer 70:ef:00:5a:0c:a4 for vdev 0: -145
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.724906] ath10k_pci 0000:00:00.0: found sta peer 70:ef:00:5a:0c:a4 (ptr 86b3b200 id 81) entry on vdev 0 after it was supposedly removed
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.739805] ------------[ cut here ]------------
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.744706] WARNING: CPU: 0 PID: 4115 at backports-2017-11-01/net/mac80211/sta_info.c:1001 sta_set_sinfo+0x924/0x9cc [mac80211]
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.756601] Modules linked in: fast_classifier ath9k ath9k_common rt2800usb rt2800lib pppoe ppp_async option ath9k_hw ath10k_pci ath10k_core ath usb_wwan sierra_net sierra rt2x00usb rt2x00lib rndis_host qmi_wwan pppox ppp_mppe ppp_generic nf_nat_pptp nf_conntrack_pptp nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE huawei_cdc_ncm cp210x cfg80211 cdc_ncm cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_hashlimit xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_IPMARK xt_HL xt_DSCP xt_CT xt_CLASSIFY wireguard usbserial usbnet ts_fsm ts_bm slhc nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.830471]  nf_nat_masquerade_ipv4 nf_nat_irc nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_ftp nf_nat_amanda nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast ts_kmp nf_conntrack_amanda iptable_mangle iptable_filter ipt_ECN ipheth ip_tables crc_itu_t crc_ccitt compat_xtables compat cdc_wdm cdc_acm xt_u32 fuse sch_cbq sch_teql em_nbyte sch_dsmark sch_prio sch_pie sch_gred em_meta act_police cls_basic act_ipt sch_multiq em_text sch_codel sch_fq em_cmp sch_red sch_sfq act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfSun Jun 21 02:42:55 2020 kern.warn kernel: [79927.967293] CPU: 0 PID: 4115 Comm: hostapd Not tainted 4.9.120 #0
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.973580] Stack : 805675b2 00000035 00000000 00000001 86b6f66c 80503407 804a6fbc 00001013
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.982297]         80563700 000003e9 00000000 00000008 00000000 800a93ac 804ac810 80500000
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.991132]         00000003 000003e9 804aa9d0 86bd7b0c 00000000 800d7c5c 805675b2 00000073
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79927.999858]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.008567]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.017276]         ...
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.019813] Call Trace:
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.022343] [<8006b1a0>] show_stack+0x70/0x8c
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.026875] [<8007ff94>] __warn+0x110/0x118
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.031398] [<80080030>] warn_slowpath_null+0x1c/0x2c
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.036785] [<86e86f74>] sta_set_sinfo+0x924/0x9cc [mac80211]
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.042830] [<86e84978>] sta_info_get_bss+0x18/0x6c [mac80211]
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.048949] [<86e870fc>] sta_info_destroy_addr_bss+0x38/0x60 [mac80211]
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.055890] [<86dce4b0>] cfg80211_check_station_change+0x2364/0x3240 [cfg80211]
Sun Jun 21 02:42:55 2020 kern.warn kernel: [79928.063492] ---[ end trace 9413e606887c69ac ]---

followed by lots of

Sun Jun 21 02:42:58 2020 kern.warn kernel: [79931.156051] ath10k_pci 0000:00:00.0: failed to send pdev bss chan info request
Sun Jun 21 02:43:04 2020 kern.warn kernel: [79937.236048] ath10k_pci 0000:00:00.0: failed to set beacon mode for vdev 0: -11

etc

and

hostapd: ieee802_11_send_sa_query_req: send failed

and

Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.376657] ------------[ cut here ]------------
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.381560] WARNING: CPU: 0 PID: 4115 at backports-2017-11-01/net/mac80211/sta_info.c:993 sta_set_sinfo+0x8d4/0x9cc [mac80211]
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.393338] Modules linked in: fast_classifier ath9k ath9k_common rt2800usb rt2800lib pppoe ppp_async option ath9k_hw ath10k_pci ath10k_core ath usb_wwan sierra_net sierra rt2x00usb rt2x00lib rndis_host qmi_wwan pppox ppp_mppe ppp_generic nf_nat_pptp nf_conntrack_pptp nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE huawei_cdc_ncm cp210x cfg80211 cdc_ncm cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_hashlimit xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_IPMARK xt_HL xt_DSCP xt_CT xt_CLASSIFY wireguard usbserial usbnet ts_fsm ts_bm slhc nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.466935]  nf_nat_masquerade_ipv4 nf_nat_irc nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_ftp nf_nat_amanda nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast ts_kmp nf_conntrack_amanda iptable_mangle iptable_filter ipt_ECN ipheth ip_tables crc_itu_t crc_ccitt compat_xtables compat cdc_wdm cdc_acm xt_u32 fuse sch_cbq sch_teql em_nbyte sch_dsmark sch_prio sch_pie sch_gred em_meta act_police cls_basic act_ipt sch_multiq em_text sch_codel sch_fq em_cmp sch_red sch_sfq act_connmark nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfSun Jun 21 02:49:07 2020 kern.warn kernel: [80299.602879] CPU: 0 PID: 4115 Comm: hostapd Tainted: G        W       4.9.120 #0
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.610472] Stack : 805675b2 00000043 00000000 00000001 86b6f66c 80503407 804a6fbc 00001013
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.619180]         80563700 000003e1 00000000 00000008 00000000 800a93ac 804ac810 80500000
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.627889]         00000003 000003e1 804aa9d0 86bd7b0c 00000000 800d7c5c 805675b2 00000072
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.636590]         80513d00 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.645307]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.654198]         ...
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.656768] Call Trace:
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.659307] [<8006b1a0>] show_stack+0x70/0x8c
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.663852] [<8007ff94>] __warn+0x110/0x118
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.668190] [<80080030>] warn_slowpath_null+0x1c/0x2c
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.673603] [<86e86f24>] sta_set_sinfo+0x8d4/0x9cc [mac80211]
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.679663] [<86e84978>] sta_info_get_bss+0x18/0x6c [mac80211]
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.685745] [<86e870fc>] sta_info_destroy_addr_bss+0x38/0x60 [mac80211]
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.692726] [<86dce4b0>] cfg80211_check_station_change+0x2364/0x3240 [cfg80211]
Sun Jun 21 02:49:07 2020 kern.warn kernel: [80299.700321] ---[ end trace 9413e606887c69ad ]---

alzhao · 2020-06-22T09:07:48.107Z

fowl:

PS. is it normal for the CPU usage to go up to >2 just browsing around luci?

Yes.

Can you let me know when the kernel panic will happen? like doing what kind of operations.

fowl · 2020-06-22T09:47:33.037Z

Using my laptop to browse the web, video calls.

I typically have ~5 devices on the 5G radio and 3 on the 2.4G radio. eg. iPhone, iPad, Google Nest Mini, Nexus 5X, ESP based WiFi smart lights.

alzhao · 2020-06-23T07:57:50.366Z

If possible I suggest you get a replacement to see if this happens. Just to make sure it is not a problem with the unit you have.

fowl · 2020-06-23T08:10:35.558Z

I purchased this device via Amazon, should I contact them for a replacement?

alzhao · 2020-06-23T08:26:48.033Z

Yes. Just contact us via Amazon.

fowl · 2020-07-14T08:34:21.146Z

Replacement unit is working flawlessly.