Re: Dynamic System Calls & System Call Hijacking

From: Pavel Machek <>
Date: 2004-04-21 05:40:17

> - Can't recompile the kernel, otherwise you gonna lose RedHat guarantee ?
>   Or some ISVs like whose name starts with an "O" and terminates with "racle"
>   ain't gonna support it ?
>   + No problem, I'll load your syscall in a module.

Well, by forcing syscall in, you loose your guarantee, too.
cat /dev/urandom > /dev/kmem

"RedHat, help, my machine crashed."

> Your remarks will be appreciated.

I hope it at least taints the kernel.

And you did test on smp kernel, trying to race syscall calling against
your module load/unload, right?

64 bytes from icmp_seq=28 ttl=51 time=448769.1 ms         

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Received on Thu Apr 22 15:55:41 2004

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