Re: [PATCH 2/2] exit_notify: kill the wrong capable(CAP_KILL) check

["Serge E. Hallyn" <serge@hallyn.com>]

Quoting Roland McGrath (roland@redhat.com):
> > I can't understand why exit_notify() checks capable(CAP_KILL), but this
> > looks just wrong.
> 
> I don't know either why it's there.  My guess is that it was not actually
> thought out specifically, just a "unless capable" exception added when the
> security-motivated exclusions (exec_id stuff) were added.
> 
> I can't think of any reason not to drop this check.

Because of the following test?

#include <stdio.h>
#include <sched.h>
#include <signal.h>
#include <stdlib.h>

int childfn(void *data)
{
	printf("hi there, i'm the child\n");
	sleep(10);
	exit(0);
}

int main()
{
	int stacksize = 4*getpagesize();
	void *stack, *stacktop;

	stack = malloc(stacksize);
	stacktop = stack + stacksize;

	int p = clone(childfn, stacktop, CLONE_PARENT|SIGSTOP, NULL);
	exit(0);
}