Re: possible kernel bug in signal transit.

[Andrew Morton <akpm@osdl.org>]

Alex Lyashkov <shadow@psoft.net> wrote:
>
> > Thanks for checking though..
>  No. it can`t return final non-zero-returning group_send_sig_info() if
>  first call group_send_sig_info return 0.

you're right.   How about the nice and simple version?

int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp)
{
	struct task_struct *p;
	struct list_head *l;
	struct pid *pid;
	int retval;
	int found;

	if (pgrp <= 0)
		return -EINVAL;

	found = 0;
	retval = 0;
	for_each_task_pid(pgrp, PIDTYPE_PGID, p, l, pid) {
		int err;

		found = 1;
		err = group_send_sig_info(sig, info, p);
		if (!retval)
			retval = err;
	}
	return found ? retval : -ESRCH;
}