frequently kernel panic on Unleashed.

[hyosang_choi]

Hi.

We are using 3 UAP using 200.4.x.

Aps are frequently and randomly rebooted.

Below is event log of ap which rebooted this morning.

---------------------------------------------------------------------------------------------------
### Reboot Reason ###
kernel panic

### Reboot Reason In Detail Recently ###
              Reboot Time            UP Time Total Boot Reason
 Sat Jul  8 12:48:51 2017     0 day 00:03:59          7 WebUI, rebooting for new software image to take effect
 Sat Jul  8 12:53:19 2017     0 day 00:04:10          8 APMgr, Receives Reset command from Unleashed Master in Run state
 Thu Jul 20 00:57:28 2017    11 day 12:03:40          9 APMgr, Receives Reset command from Unleashed Master in Run state
 Fri Jul 21 00:25:30 2017     0 day 15:11:21          1 APMgr, Receives Reset command from Unleashed Master in Run state
 Fri Jul 21 00:28:43 2017     0 day 00:02:56          2 APMgr, Receives Reset command from Unleashed Master in Run state
 Fri Jul 21 00:30:47 2017     0 day 00:01:47          3 APMgr, Receives Reset command from Unleashed Master in Run state

### Reboot Reason End ###

### Apmgr Crashdump Info ###

### Apmgr Crashdump Info End###

### Application Crash Reason In Detail Recently ###
               Crash Time            UP Time Reason
Cannot open /writable/etc/system/crash_reason: No such file or directory

### Application Crash Reason End ###

### Kernel Oops ###
0xaff00000[2030]: Image: type=1 index=4 total_boot=2

 @ j=501a0102, c0=aa064390, current=swapper
SW Version: 200.4.9.13.47 based on //depot/release/unleashed_200.4.9.13 CL 519771

Kernel bug detected[#1]:
Cpu 0
$ 0   : 00000000 00000000 0000007c 00000001
$ 4   : 803a0a70 00025df2 00000001 00025df2
$ 8   : 00004000 80450000 00000001 20646576
$12   : 000000cd 00058000 0a41fed4 faff0000
$16   : 8db46069 8db45c69 8b23c300 8b23df04
$20   : 00000401 8db00300 00000000 8db45c63
$24   : 00000002 801ba2a0                  
$28   : 80398000 8039ba10 8e471820 80246164
Hi    : 00000000
Lo    : b69f5000
epc   : 80246164 skb_put+0x74/0x90
    Tainted: P          
ra    : 80246164 skb_put+0x74/0x90
Status: 1100ff03    KERNEL EXL IE 
Cause : 00800024
PrId  : 00019750 (MIPS 74Kc)
Modules linked in: dot1x wispr_http(P) av(P) tdts(P) br_dnat(P) afmod(P) crypto_aes_ccm(P) crypto_aes_cbc crypto(P) v54smartmedia(P) br_dhcp(P) ath_dual wlan_u(P) wlan_acl wlan_xauth wlan_ccmp wlan_wep wlan_tkip wlan_scan_sta wlan_scan_rks ath_spectral(P) ath_dfs(P) ath_rate_v54beamflex(P) ath_hal(P) wlan tpm_i2c_infineon tpm rks_fastpath(P) athrs_gmac_s17 rflow(P) rks_dns(P) pif(P) rudb(P) br_ci(P)
Process swapper (pid: 0, threadinfo=80398000, task=8039c600, tls=00000000)
Stack : 00000000 c08785bc 000004dc 00000400 8db45c00 8db45c20 8db460fc 8db45e40
        80363a00 c0d27a48 8d6a8920 c08785bc 00000000 80246e7c 00000000 00000001
        8d6a8944 8d6a8920 00008000 c0d19924 0000003a 8db00300 00000064 c088d820
        8c9ee054 8b23c300 00000001 8db10300 00000000 00000001 8db00300 00000001
        00000001 c0d19ca8 897f4000 00000118 8a5b39e0 00000000 00000000 00000000
        ...
Call Trace:
[<80246164>] skb_put+0x74/0x90
[] ieee80211_beacon_update+0x720/0xecc [wlan]
[] wmi_beacon_swba_handler+0x2ec/0x414 [ath_dual]
[] wmi_control_rx+0xec/0x25c [ath_dual]
[] DoRecvCompletion+0xbc/0x104 [ath_dual]
[] HTCControlRxComplete+0x4bc/0x528 [ath_dual]


Code: afa9001c  0c0c1628  afa20020 <0200000d> 0809185a  00000000  8fbf002c  01001021  03e00008 

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And our customer use 10 UAP.

It happen frequently rebooting reason as "kernel panic".


Below is snapshot for syslog on our slog server.


How should we do to prevent rebooting for "kernel panic"?

Unfortunatly We don't have support entilement for UAPs.

But it must be improved.

Anyone help us for solving?