[panda-users] Osi_linux plugin

Thu Apr 16 10:51:06 EDT 2015

Hi Manolis,

I created the kernelinfo.conf file, but I do not understand where I have to
put it in order to make the osi_linux plugin work.
It gives me this error when I try to run panda with this command line
--> ./qemu-system-x86_64 -m 1G -monitor stdio -hda ../../../challdeb.img
-loadvm booted -panda 'osi;osi_linux;osi_test'

What am I doing wrong?

Thanks

-Simone

Il giorno gio 16 apr 2015 alle ore 15:36 Simone Mazzoni <
simone.mazzoni13 at gmail.com> ha scritto:

> Hi,
>
> I extracted the parameters from the OS kernel that I want introspect.
>
> The parameters are these:
>
> Apr 14 22:38:24 polictf kernel: [ 3533.872169] --KERNELINFO-BEGIN--
> Apr 14 22:38:24 polictf kernel: [ 3533.873067] name = #1 SMP Debian
> 3.2.65-1+deb7u2 i686
> Apr 14 22:38:24 polictf kernel: [ 3533.873114] task.size = 1060
> Apr 14 22:38:24 polictf kernel: [ 3533.873249] #task.init_addr = 0xC13E2FE0
> Apr 14 22:38:24 polictf kernel: [ 3533.873279] task.init_addr = 3242078176
> Apr 14 22:38:24 polictf kernel: [ 3533.873310] task.task_offset = 0
> Apr 14 22:38:24 polictf kernel: [ 3533.873356] task.tasks_offset = 212
> Apr 14 22:38:24 polictf kernel: [ 3533.873394] task.pid_offset = 292
> Apr 14 22:38:24 polictf kernel: [ 3533.873420] task.tgid_offset = 296
> Apr 14 22:38:24 polictf kernel: [ 3533.873447] task.group_leader_offset =
> 328
> Apr 14 22:38:24 polictf kernel: [ 3533.873475] task.thread_group_offset =
> 384
> Apr 14 22:38:24 polictf kernel: [ 3533.873504] task.real_parent_offset =
> 304
> Apr 14 22:38:24 polictf kernel: [ 3533.873532] task.parent_offset = 308
> Apr 14 22:38:24 polictf kernel: [ 3533.873559] task.mm_offset = 240
> Apr 14 22:38:24 polictf kernel: [ 3533.873586] task.stack_offset = 4
> Apr 14 22:38:24 polictf kernel: [ 3533.873615] task.real_cred_offset = 504
> Apr 14 22:38:24 polictf kernel: [ 3533.873642] task.cred_offset = 508
> Apr 14 22:38:24 polictf kernel: [ 3533.873668] task.comm_offset = 516
> Apr 14 22:38:24 polictf kernel: [ 3533.873693] task.comm_size = 16
> Apr 14 22:38:24 polictf kernel: [ 3533.873722] cred.uid_offset = 4
> Apr 14 22:38:24 polictf kernel: [ 3533.873749] cred.gid_offset = 8
> Apr 14 22:38:24 polictf kernel: [ 3533.873774] cred.euid_offset = 20
> Apr 14 22:38:24 polictf kernel: [ 3533.873813] cred.egid_offset = 24
> Apr 14 22:38:24 polictf kernel: [ 3533.873842] mm.mmap_offset = 0
> Apr 14 22:38:24 polictf kernel: [ 3533.873867] mm.pgd_offset = 36
> Apr 14 22:38:24 polictf kernel: [ 3533.873901] mm.arg_start_offset = 152
> Apr 14 22:38:24 polictf kernel: [ 3533.873970] mm.start_brk_offset = 140
> Apr 14 22:38:24 polictf kernel: [ 3533.874004] mm.brk_offset = 144
> Apr 14 22:38:24 polictf kernel: [ 3533.874032] mm.start_stack_offset = 148
> Apr 14 22:38:24 polictf kernel: [ 3533.874078] vma.vm_mm_offset = 0
> Apr 14 22:38:24 polictf kernel: [ 3533.874104] vma.vm_start_offset = 4
> Apr 14 22:38:24 polictf kernel: [ 3533.874133] vma.vm_end_offset = 8
> Apr 14 22:38:24 polictf kernel: [ 3533.874161] vma.vm_next_offset = 12
> Apr 14 22:38:24 polictf kernel: [ 3533.874187] vma.vm_flags_offset = 28
> Apr 14 22:38:24 polictf kernel: [ 3533.874215] vma.vm_file_offset = 80
> Apr 14 22:38:24 polictf kernel: [ 3533.874242] fs.f_dentry_offset = 12
> Apr 14 22:38:24 polictf kernel: [ 3533.874268] fs.f_path_offset = 8
> Apr 14 22:38:24 polictf kernel: [ 3533.874293] fs.d_name_offset = 20
> Apr 14 22:38:24 polictf kernel: [ 3533.874320] fs.d_iname_offset = 36
> Apr 14 22:38:24 polictf kernel: [ 3533.874347] fs.d_parent_offset = 16
> Apr 14 22:38:24 polictf kernel: [ 3533.874369] ---KERNELINFO-END---
>
> At this point, if I am not wrong, I have to edit the kernelinfo.conf file
> with the new parameters. It is right or there are other things to do?
>
> Thanks.
>
> - Simone
>
> Il giorno mer 15 apr 2015 alle ore 20:41 Manolis Stamatogiannakis <
> mstamat at gmail.com> ha scritto:
>
>> When you run the plugin, kernelinfo.conf must exist in your current
>> directory. So just soft-link it from the source directory of the plugin.
>>
>> In your case however, the stock kernelinfo.conf won't work because it
>> currently contains only information for the 32bit kernel used by debian
>> stable.
>> So you have to compile the kernelinfo module in a guest running (ideally)
>> the same kernel you want to introspect.
>> Then insert it into the kernel (insertion always fails) and use the
>> supplied python script to extract the offsets for that kernel.
>>
>> The offsets should then be appended to kernelinfo.conf. Also make a pull
>> request for the updated kernelinfo.conf when you do this.
>>
>> IIRC, the kernelinfo module had some glitches which prevented it from
>> compiling in recent kernels (e.g. 3.20). So if you encounter any problems,
>> drop me an email so that I expedit making a pull request for the fixed
>> version.
>>
>> Cheers,
>> M.
>>
>>
>>
>>
>> M.
>>
>> 2015-04-15 8:26 GMT-07:00 Simone Mazzoni <simone.mazzoni13 at gmail.com>:
>>
>>> Hello,
>>>
>>> I tried to use the osi_linux plugin to get the current process in
>>> execution but it seems not to work.
>>> I tried to execute panda with -panda 'osi;osi_linux;osi_test' but it
>>> gives me the following error:
>>>
>>>
>>> Any idea of the reason?
>>>
>>> I noticed see that the plugin contain a "utils/kernelinfo" folder that
>>> should contain a script or something to extract the correct offset of the
>>> running kernel, but I do not understand how to use it.
>>>
>>> I tried running the osi_test on an Debian SO and on a Ubuntu 14.04 SO.
>>>
>>> Thanks for the help.
>>>
>>> - Simone
>>>
>>> _______________________________________________
>>> panda-users mailing list
>>> panda-users at mit.edu
>>> http://mailman.mit.edu/mailman/listinfo/panda-users
>>>
>>>
>>
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