How to duplicate arbitrary process via an LKM

[Curtis Taylor]

Hello all,

I'm wondering if it's possible to create an LKM that can take an arbitrary
process, removes it from the run queue, duplicates it, and re-runs it with
it's new PID. I would like to see the functionality of a simple user space
fork() but I don't want to edit the application's source code.

I'm new to writing kernel code and after looking at a kernel dev book, it
looks like the system calls clone or do_fork would be what I would leverage
for this. The problem is that clone expects some user space data data in
order to work, but maybe it's possible I could look at the task struct and
figure out everything I need?

Please 'cc' me with responses as I'm not on the mailing list.

Thanks in advance!


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