 kernel module
Kernel Module
Language: C
Platform: Linux
Intro
This was an assignment in my system admin class. Here is the notes and assignment that I handed into the instructor
Hey Cliff,
Very kewl assignment this time. I am really
into this kernel mod stuff. I decided to alter
the assignment a little... into an evil
assignment. I was first going to write a module
that stole syscalls and spyed on them, but since
the syscall table is no longer exported in 2.6
kernels this was not an option. So what I have
done instead was to write a device driver that
once you create the device node /dev/killpid you
can read and write to the device. What you can do
then is 'echo "pid" > /dev/killpid' and my module
will use kernel functions to kill that process.
This allows anyone with perm to write to this device
to end any process on the system that they see fit.
Hance the 'evil' aspect to it ... muu ha ha ha.
Anyhow I will demonstrate its use on my system.. and
I plan on playing with this stuff a lot more.
Perhaps I will work on a kewl module for the project
in this class. But like I said.. very kewl assignment.
Cheers,
Corey Auger
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