On Sun, Mar 22, 2009 at 1:38 PM, Chetan Nanda <chetannanda@xxxxxxxxx> wrote:
> Hi All,
>
> I am experimenting with real time process on kernel version 2.6.24 (under
> UML) and having root privileges.
> I have written a simple code as follow:
>
> /*##############################*/
> int main()
> {
> pid_t pid;
> struct sched_param param;
> pid = getpid();
> memset((void *)¶m, 0 , sizeof(struct sched_param));
> param.sched_priority = 30;
>
> /*change the priority to rt*/
> sched_setscheduler(pid,SCHED_FIFO, ¶m);
>
> while(1);
> }
> /*##############################*/
>
> On running this program cause system to hangs and this is as per the real
> time task implementation in the kernel.
> Which says a rt task with policy equal to 'SCHED_FIFO' will run till it
> voluntarily release CPU.
>
> Is there any way to kill such task? Isn't this kind of behavior compromising
> system security?
>
AFAIK, No.
And as far as the security is concerned, only a super user can run
this task. Meaning that the user has the authority to do such things.
> ~~
> Chetan Nanda
>
--
Regards,
Sandeep.
“To learn is to change. Education is a process that changes the learner.”
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