Subject: Re: Mpc8315erdb openvpn segmentation fault

From: Scott Wood <[email-masked]>
Date: Mon, 7 Mar 2011 14:22:07 -0600

On Mon, 7 Mar 2011 03:09:27 -0800
Vasanth Ragavendran <[email-masked]> wrote:

> 
> i'm facing a problem. i've installed openvpn on mpc8315erdb board and when i
> give the command
> 
> openvpn --mktun --dev tap0 i get the error
> 
>  
> 
> [root@mpc8315erdb /]# openvpn --mktun --dev tap0
> Sat Jan  1 01:04:21 2000 OpenVPNUnable to handle kernel paging request for
> data
> at address 0x00000000
>  2.0.9 ppc-rpm-lFaulting instruction address: 0xc90a208c
> inux-gnu [SSL] [Oops: Kernel access of bad area, sig: 11 [#1]
> MPC831x RDB
> Modules linked in: tun
> **bleep**: c90a208c LR: c90a2068 CTR: c0288e58
> REGS: c294fd80 TRAP: 0300   Not tainted  (2.6.29.6)
> MSR: 00009032 <EE,ME,IR,DR>  CR: 24002424  XER: 20000000
> DAR: 00000000, DSISR: 20000000
> TASK = c70b6440[1635] 'openvpn' THREAD: c294e000
> GPR00: 00000001 c294fe30 c70b6440 c03ebcf4 bfafa0d4 0000001c c294fe58
> 0fd8dc58
> GPR08: 00000000 00000001 ffffffe7 00000000 84002428 100787e0 07ff9000
> 00000004
> GPR16: 00000000 00000000 bfafa930 00010000 00010000 ffffffff 00000005
> 3b9aca00
> GPR24: c7023d20 c294fe3c bfafa0b8 c653e6e0 00000000 c040baf4 bfafa0b8
> 800454ca
> Call Trace:
> [c294fe30] [c90a2068] 0xc90a2068 (unreliable)
> [c294fe90] [c008054c] 0xc008054c
> [c294fea0] [c00809c4] 0xc00809c4
> [c294ff10] [c0080c9c] 0xc0080c9c
> [c294ff40] [c001141c] 0xc001141c
> --- Exception: c01 at 0xfce8268
>     LR = 0xfd6bdec
> Instruction dump:
> 4bfffecc 9b81001b 480008ed 3d20c90a 38000001 8129306c 81620308 2f890000
> 830201a4 83ab0014 817d0124 419e0014 <800b0000> 7c090010 7c000110 7c0000d0
> LZO] [EPOLL] bui---[ end trace 54eee2a93ccf53d1 ]---
> lt on Mar  2 2011
> Sat Jan  1 01:04:21 2000 IMPORTANT: OpenVPN's default port number is now
> 1194, b
> ased on an official port number assignment by IANA.  OpenVPN 2.0-beta16 and
> earl
> ier used 5000 as the default port.
> Sat Jan  1 01:04:21 2000 ******* WARNING *******: all encryption and
> authenticat
> ion features disabled -- all data will be tunnelled as cleartext
> Segmentation fault
> 
>  
> 
> Some one plz help me out! wat does this mean? Coz with the same kernel image
> and the same settings  i'm able to successfully run the above command on
> another mpc8315erdb board. but it fails on one of the board! any ideas would
> be of great help to me!! plz!

Please turn on CONFIG_KALLSYMS, so that symbols will be reported in the
crash dump, and let us know which kernel you're using.

Are the other boards where it does not fail running the same kernel?  Same
userspace?  Same U-Boot?  Anything else different?

-Scott