Subject: Segmentation fault when using ping6

From: [email-masked] (George G. Davis)
Date: Thu, 7 Oct 2010 09:04:28 -0400

On Thu, Oct 07, 2010 at 09:26:34AM -0300, Rogerio Pimentel wrote:
> Hi,
> 
> I'm having a "segmentation fault" problem when using ping6.
> 
> When testing on ARM9 platforms (i.MX25 and i.MX27), it returns the error:
> 
> root at freescale ~$ ping6 ::1
> PING ::1 (::1): 56 data bytes
> Segmentation fault
> 
> When testing on ARM11 and ARM Cortex A8 platforms (i.MX31 and
> i.MX51), it works:
> 
> root at freescale ~$ ping6 ::1
> PING ::1 (::1): 56 data bytes
> 64 bytes from ::1: seq=0 ttl=64 time=0.331 ms
> 64 bytes from ::1: seq=1 ttl=64 time=0.214 ms
> 64 bytes from ::1: seq=2 ttl=64 time=0.176 ms
> 64 bytes from ::1: seq=3 ttl=64 time=0.155 ms
> 
> On all cases, I'm using Linux Kernel 2.6.35 (from Mainline) and
> Busybox 1.15.0
> 
> Does anybody have any idea?

Random guess is that you may be using a userland tuned for ARMv6 or later
but trying to run that on <ARMv6 machines.

You can enable this to see what's going wrong:

config DEBUG_USER
        bool "Verbose user fault messages"
        help
          When a user program crashes due to an exception, the kernel can
          print a brief message explaining what the problem was. This is
          sometimes helpful for debugging but serves no purpose on a
          production system. Most people should say N here.

          In addition, you need to pass user_debug=N on the kernel command
          line to enable this feature.  N consists of the sum of:

              1 - undefined instruction events
              2 - system calls
              4 - invalid data aborts
              8 - SIGSEGV faults
             16 - SIGBUS faults

--
Regards,
George

> 
> Thanks in advance,
> 
> Rogerio Pimentel
> 
> 
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