spontaneous reboot - ptrace

[Kostik Belousov]

On Fri, Feb 18, 2011 at 03:58:05AM -0800, Dr. Baud wrote:
> 
> 
> > First, do you have a console output during the run ? Is it possible
> > that machine paniced ? If not, were there any kernel messages before>
> > reboot ?
> >
> > Second, what is the process you are dumping ? Can you show at least
> > the procstat -v <pid> output for the process ?
> 
>     Sorry for this late response but my earlier response appears to have been 
> consumed by the email reflector.
> 
>     I'm getting an NMI. And the trouble appears to be when trying to
> read via ptrace memory segments of type KVME_TYPE_DEVICE. The app in
> quesion allocates a large number of large memory buffers and maps them
> into virtual address space. Not all segments cause the NMI however.
> Small sampling of the virtual memory map.
You did not provided exact console output on the panic, despite requested.

What is the device that was mmaped ? Obviously, this is your problem.

Can you gather all required information ?

> 
>   PID              START                END PRT  RES PRES REF SHD FL TP PATH
>   931           0x400000          0x1773000 r-x 4239 5053   2   1 CN vn /mnt/dia
> g/problemchild
>   931          0x1872000          0x2ef2000 rw-  416    0   1   0 C- vn /mnt/dia
> g/problemchld
>   931          0x2ef2000          0x6700000 rw- 11765    0   1   0 C- df
>   931        0x801872000        0x8018a2000 r-x   48    0  57  28 CN vn /libexec
> /ld-elf.so.1
>   931        0x8018a2000        0x8018b3000 rw-   15    0   1   0 C- df
>   931        0x8018b3000        0x801924000 rw-  113    0 1698   0 -- dv
>   931        0x801924000        0x801925000 rw-    1    0 1698   0 -- dv
>   931        0x801925000        0x801926000 rw-    1    0 1698   0 -- dv
>   931        0x801926000        0x801927000 rw-    1    0 1698   0 -- dv
>   931        0x801927000        0x801928000 rw-    1    0 1698   0 -- dv
>   931        0x801928000        0x80192a000 rw-    2    0 1698   0 -- dv
>   931        0x80192a000        0x80192b000 rw-    1    0 1698   0 -- dv
>   931        0x80192b000        0x80192c000 rw-    1    0 1698   0 -- dv
>   931        0x80192c000        0x80192d000 rw-    1    0 1698   0 -- dv
>   931        0x80192d000        0x80192e000 rw-    1    0 1698   0 -- dv
>   931        0x80192e000        0x801930000 rw-    2    0 1698   0 -- dv
>   931        0x801930000        0x801932000 rw-    2    0 1698   0 -- dv
>   931        0x801932000        0x801993000 rw-   97    0 1698   0 -- dv
>   931        0x801993000        0x8019a0000 rw-   13    0 1698   0 -- dv
>   931        0x8019a0000        0x8019a1000 rw-    1    0 1698   0 -- dv
> 
>     ....
> 
>   931        0x802ab7000        0x802bb7000 ---    0    0   1   0 CN df
> 931        0x0x802bb70        0x0x802bd6000 rw-   17    0   1   0 C- vn /lib/lib
> c.so.7
>   931        0x802bd6000        0x802bf1000 rw-   18    0   1   0 C- df
>   931        0x802bf1000        0x802bfd000 r-x    9   14   2   1 CN vn /lib/lib
> gcc_s.so.1
>   931        0x802bfd000        0x802cfc000 ---    0    0   1   0 CN df
>   931        0x802cfc000        0x802cfe000 rw-    2    0   1   0 CN vn /lib/lib
> gcc_s.so.1
>   931        0x802cfe000        0x802cff000 rw-    1    0 1698   0 -- dv
>   931        0x802cff000        0x802d00000 rw-    1    0 1698   0 -- dv
>   931        0x802d00000        0x802e00000 rw-  132    0   1   0 C- df
>   931        0x802e00000        0x802f00000 rw-  109    0   1   0 C- df
>   931        0x802f00000        0x802f91000 rw-  145    0 1698   0 -- dv
>   931        0x802f91000        0x802fb2000 rw-   33    0 1698   0 -- dv
>   931        0x802fb2000        0x802fd3000 rw-   33    0 1698   0 -- dv
>   931        0x802fd3000        0x802ff5000 rw-   34    0 1698   0 -- dv
>   931        0x802ff5000        0x802ff6000 rw-    1    0 1698   0 -- dv
> 
> 
>       
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