nfs.proc.open results in a kernel string copy fault

[Michael Obster]

Hi,

perhaps someone can give me a hint. First of all I tried also the  
snapshot 20070113 which did a complete system hang up. Using now the  
old 20061223 snapshot.

When I'm trying to use a
probe nfs.proc.open {
   if (execname() != "staprun")
         printf("%s: %s (%s) = ", execname(), name, argstr)
}
this results in a
ERROR: kernel string copy fault at 0x000081a4 near identifier '$filp'  
at /opt/systemtap/share/systemtap/tapset/nfs_proc.stp:1223:27
when the insmod is executed.

As I have seen, there is a change in this file (snapshot 20070113).  
But using the new snapshots hangs my system. Because I have no  
console, I don't see whether the kernel gives me an Oops.

The kernel we are using here is not a standard kernel. It is a special  
patched MontaVista Linux kernel with some additional patches for  
perfctr. The version is 2.6.10 with a backport patch from 2.6.13 for  
the kprobes interface compiled with gcc 3.4.3.

So I would be pleased for any hint!

Regards,
Michael Obster