[Vol-users] Re: Bug or documentation error - linux_dump_map

Michael Hale Ligh michael.hale at gmail.com
Thu Mar 7 10:03:09 CST 2013


Hi Edwin,

You're right, it looks like there were a few different issues with that
plugin. I applied a patch [1] similar to yours that should make things
easier. It now accepts -p, but also takes a --dump-dir argument instead of
--outfile. You can dump all VMAs from all processes, all VMAs from a
specific process (or multiple processes with -p 1,2,3) or a specific VMA
from a specific process. The output file name includes the task ID as well
as the VMA starting address. There's a summary printed to stdout to
minimize confusion.

For example:

Task       VM Start   VM End         Length Path
---------- ---------- ---------- ---------- ----
         1 0x08048000 0x0811d000    0xd5000 dumps/task.1.0x8048000.vma
         1 0x0811e000 0x08124000     0x6000 dumps/task.1.0x811e000.vma
         1 0x08124000 0x08125000     0x1000 dumps/task.1.0x8124000.vma
         1 0x08125000 0x081b0000    0x8b000 dumps/task.1.0x8125000.vma
         1 0xb7522000 0xb752e000     0xc000 dumps/task.1.0xb7522000.vma

Can you try the patch and let me know if it works for you?
Thanks,
MHL

[1]. https://code.google.com/p/volatility/source/detail?r=3169


On Thu, Mar 7, 2013 at 7:06 AM, Edwin Smulders <edwin.smulders at gmail.com>wrote:

> After some more research, I think it is a bug and the attached patch
> hopefully fixes it.
>
> On 7 March 2013 11:35, Edwin Smulders <edwin.smulders at gmail.com> wrote:
> > Hi,
> >
> > Yesterday during a challenge we had to use the linux_dump_map plugin
> > to dump a process stack, and the documentation at
> >
> https://code.google.com/p/volatility/wiki/LinuxCommandReference23#linux_proc_maps
> > says it has the -p option to select a process.
> >
> > However, as far as I can tell looking in the svn history, this plugin
> > never had the -p option. And it's definitely not working currently.
> > I've heard a confirmation that the option was working in version
> > 2.2-rc1, so maybe it was a global option?
> >
> > The reason I'm mailing this is because, if the -s is virtual memory,
> > would you not get possible overlap in areas? How do you know it dumped
> > the correct VMA? Note that every time I tried, I got the correct area.
> >
> > Cheers,
> > Edwin
>
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>
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