R7800 AP crash documentation

Hi to all,

Yesterday (at 22:18:47) my dumb AP (19.07.3) crashed. Fortunately i was able to document what happened (via external syslog). Hope the documentation below is of some use to someone.

These are the warning prior to the crash.......

"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438571.631882] ath10k_pci 0000:01:00.0: SWBA overrun on vdev 0, skipped old beacon"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438571.624469] ath10k_pci 0000:01:00.0: SWBA overrun on vdev 0, skipped old beacon"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438571.617039] ath10k_pci 0000:01:00.0: SWBA overrun on vdev 0, skipped old beacon"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438571.610506] ath10k_pci 0000:01:00.0: SWBA overrun on vdev 0, skipped old beacon"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438571.610315] ath10k_pci 0000:01:00.0: SWBA overrun on vdev 0, skipped old beacon"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.596737] Function entered at [<c0358b70>] from [<423017cc>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.590750] Function entered at [<c0358828>] from [<c0358b70>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.584671] Function entered at [<c0308550>] from [<c0358828>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.580852] Function entered at [<c030bf8c>] from [<c0308550>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.572532] 1fc0: 60000013 ffffffff"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.564228] 1fa0: 00000000 512f04d0 00000000 00000000 dd461fc8 dd461fd0 c030854c c0308550"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.559275] 1f80: 00000001 00000000 00000000 c0315100 ffffe000 c0a03cb8 c0a03c6c 00000000"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.553247] Exception stack(0xdd461f80 to 0xdd461fc8)"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.547258] Function entered at [<c03014b8>] from [<c030bf8c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.541271] Function entered at [<c030e40c>] from [<c03014b8>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.535282] Function entered at [<c07c09c4>] from [<c030e40c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.529292] Function entered at [<c030b390>] from [<c07c09c4>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.524260] Function entered at [<c030f1c4>] from [<c030b390>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.516875] Hardware name: Generic DT based system"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.513928] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G      D         4.14.180 #0"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.497608] ---[ end trace d9666f0013db003b ]---"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.485624] Function entered at [<c033d1ec>] from [<c0307c48>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.479630] Function entered at [<c033754c>] from [<c033d1ec>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.473646] Function entered at [<c0337050>] from [<c033754c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.467654] Function entered at [<c0654728>] from [<c0337050>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.461664] Function entered at [<c0653b84>] from [<c0654728>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.455675] Function entered at [<c065176c>] from [<c0653b84>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.449687] Function entered at [<c065563c>] from [<c065176c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.443697] Function entered at [<c05ad974>] from [<c065563c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.437705] Function entered at [<c0565d0c>] from [<c05ad974>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.431716] Function entered at [<c0565cb0>] from [<c0565d0c>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.425728] Function entered at [<c05657f0>] from [<c0565cb0>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.419479] Function entered at [<c056ee50>] from [<c05657f0>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.411154] Function entered at [<c07be278>] from [<c056ee50>]"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.253679] Control: 10c5787d  Table: 5e91c06a  DAC: 00000051"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.246997] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.240225] r3 : dcdaf500  r2 : 1fffa6f0  r1 : 00000000  r0 : c0a200a0"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.234838] r7 : dd4dac80  r6 : 6401e46e  r5 : 00000006  r4 : c0a64ce0"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.229459] r10: 23c34600  r9 : dd640400  r8 : 16e36000"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.223036] sp : dc1f1df8  ip : 00000000  fp : dd7a7128"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.218258] pc : [<dcdaf500>]    lr : [<c07be278>]    psr: a0000013"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.214352] task: dc17cf00 task.stack: dc1f0000"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.209337] Workqueue: events 0xc06546f0"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.202548] Hardware name: Generic DT based system"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.192838] CPU: 0 PID: 26572 Comm: kworker/0:1 Not tainted 4.14.180 #0"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.170590]  sd_mod ahci_platform libahci_platform libahci libata scsi_mod ehci_hcd gpio_button_hotplug"
"2020-07-31 22:18:47","warning","kern","kernel","R7800_AP"," [1438567.116608] Modules linked in: pppoe ppp_async 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_FLOWOFFLOAD 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_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat ledtrig_usbport nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 leds_gpio xhci_plat_hcd xhci_pci xhci_hcd dwc3 dwc3_of_simple ohci_platform ohci_hcd phy_qcom_dwc3 ahci ehci_platform"

these errors occur just after restart (probably not of interest).....

"2020-07-31 22:19:44","error","daemon","odhcp6c","R7800_AP"," Failed to send DHCPV6 message to ff02::1:2 (Address not available)"
"2020-07-31 22:19:44","error","daemon","odhcp6c","R7800_AP"," Failed to send DHCPV6 message to ff02::1:2 (Address not available)"
"2020-07-31 22:19:44","error","daemon","hostapd","R7800_AP"," Using interface wlan1 with hwaddr 3c:37:86:29:18:9f and ssid "SkyNet node 24""
"2020-07-31 22:19:44","error","daemon","odhcp6c","R7800_AP"," Failed to send RS (Address not available)"

the criticals ......

"2020-07-31 22:18:47","critical","kern","kernel","R7800_AP"," [1438567.508468] CPU1: stopping"

the alerts .....

"2020-07-31 22:18:47","alert","kern","kernel","R7800_AP"," [1438567.109836] [dcdaf500] *pgd=5ec1141e(bad)"
"2020-07-31 22:18:47","alert","kern","kernel","R7800_AP"," [1438567.103414] pgd = dc91c000"
"2020-07-31 22:18:47","alert","kern","kernel","R7800_AP"," [1438567.103372] Unable to handle kernel paging request at virtual address dcdaf500"

and the emergencies.....

"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.602740] Rebooting in 3 seconds.."
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.503588] Kernel panic - not syncing: Fatal exception"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.491634] Code: 70752e73 65746164 61666544 56746c75 (dc84e600)"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.402840] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.394509] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.386175] 1fa0: 00000000 00000000 00000000 c0307c48 00000000 00000000 00000000 00000000"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.377844] 1f80: 00000000 c033d1ec 00000000 dbd7d500 c033d0a4 00000000 00000000 00000000"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.369508] 1f60: dc159ebc dbd7d680 dc1f0000 dbd7d500 dc159ebc dbd7d69c dc934380 c0337208"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.361177] 1f40: dc934380 dda07540 dc934398 dda07558 ffffe000 c0a02d00 00000008 c033754c"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.352842] 1f20: dcc200b8 dc934380 dda07540 dda0a400 00000000 c0337050 dda07558 ffffe000"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.344509] 1f00: dcc200b8 00000000 dcc20084 dcc34200 c0a1f0c4 00000000 00000000 c0654728"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.336176] 1ee0: dcc20080 dcc34200 dcc20080 dcc20100 dcc20100 dcc1e300 00000000 c0653b84"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.327843] 1ec0: 000927c0 00000000 dda07540 c065176c 00000002 0005dc00 000927c0 00000021"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.319509] 1ea0: 00000000 c065507c 00009c40 dcc34200 00000000 c0a61004 00000000 00000001"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.311176] 1e80: 23c34600 dcc1e240 dcc1e25c 00000001 dcc1e280 00000000 dda07540 c065563c"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.302842] 1e60: c0a61004 00000000 dcc1e140 dd7a70a8 23c34600 16e36000 00009c40 dcc34200"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.294510] 1e40: dd7a7100 dda01010 dd7a7080 c0565d0c dd78c200 00000000 dd7a7100 c05ad974"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.286177] 1e20: 00000000 dd640580 dd7a7080 16e36000 23c34600 c0565cb0 dd769bc0 23c34600"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.277843] 1e00: 20000013 c056ee50 dd640580 00000000 23c34600 c05657f0 dd640580 23c34600"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.273562] 1de0:                                                       dd6404d8 00000001"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.266612] Stack: (0xdc1f1df8 to 0xdc1f2000)"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.260710] Process kworker/0:1 (pid: 26572, stack limit = 0xdc1f0210)"
"2020-07-31 22:18:47","emergency","kern","kernel","R7800_AP"," [1438567.112713] Internal error: Oops: 8000000d [#1] SMP ARM"