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Posts: 2
Registered: ‎04-04-2017
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LAPAC1750PRO Access Point crash

Hi,

 

Recently I noticed my access point LAPAC1750PRO reboots sometimes.

System Uptime has changed I see it in the system summary. After a little bit investigation, I found the messages about crashes in the diagnostic log. See below:

 

crashdump4:
Software Version: 1.0.7.build.007
Crash Log:
Uptime of the AP: 0 Days, 0 Hours, 36 Minutes and 44 Seconds
Page Table Data:
   pgd = c4188000
   *pgd=06a8a031
   *pte=00000000  *ppte=00000000

Registers:
   pc : 40121988  lr : 00013504  psr: 60000010
   sp : be9ae528  ip : 00026e28  fp : be9ae534
   r10: be9b8d40  r9 : 0000c708  r8 : 000097c4
   r7 : be9b8ee6  r6 : 00000012  r5 : be9b8dd4  r4 : 5d5d5d5d
   r3 : 00000000  r2 : 0000002e  r1 : 0000005d  r0 : 00000000
   Flags: nZCv  IRQs on  FIQs on

do_page_fault() #2: sending SIGSEGV to process - mini_httpd-ssl
0x40121988 - possible crash location (pc)
0x00013504 - return addr (lr)
User space call stack: mini_httpd-ssl
0xbe9b0ec4 - lr (next)
0x00013504 - pc
0x00046c2e - fp
0xbe9b8dd4 - sp

0x002f0054 - lr (next)
0x50545448 - pc
0x02110000 - fp
0x45470000 - sp

start crash dump
Kernel Uptime of the AP: 0 Days, 0 Hours, 36 Minutes and 44 Seconds
Page Table Data:
   pgd = c4188000
   *pgd=00000000
Registers:
   pc : c0055568  lr : c0054d58  psr: 00000113
   sp : c419fcd8  ip : 00000001  fp : 00000000
   r10: c78228cc  r9 : 00000000  r8 : 0210fff4
   r7 : c044c340  r6 : c419fce0  r5 : 00000000  r4 : 0000030d
   r3 : 00000000  r2 : 0000031e  r1 : 00000000  r0 : 0000031e
   Flags: nzcv  IRQs on  FIQs on

do_page_fault() #2: sending SIGSEGV to process - mini_httpd-ssl
pc = c0055568, lr = c0054d58

Stack Trace:
[<c0055568>] (userspace_crashdump+0x3c0/0x4b8) from [<c00556f0>] (__do_user_fault+0x90/0xb4)
[<c00556f0>] (__do_user_fault+0x90/0xb4) from [<c0055ca8>] (do_page_fault+0x1ac/0x1d8)
[<c0055ca8>] (do_page_fault+0x1ac/0x1d8) from [<c004d374>] (do_DataAbort+0x30/0x98)
[<c004d374>] (do_DataAbort+0x30/0x98) from [<c03f1c20>] (ret_from_exception+0x0/0x10)

 

After that the device reset all connections and continue work as usual until next crash.

 

Please advise,

 

Andrey

 

 

Expert
Posts: 14,401
Registered: ‎01-18-2013

Re: LAPAC1750PRO Access Point crash

If you have the captive portal enable try disabling it for a while.


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Communities Technical Support
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Posts: 2
Registered: ‎04-04-2017

Re: LAPAC1750PRO Access Point crash

Hi ,

Thank you for your answer.

 

Yes, I have the Captive portal is enabled. I disabled it and whole week the AP is working as usual without any resets.

Probably, there is a bug in the Captive portal which crashing the AP.

 

Andrey