On Thu, 25 Jan 2007 18:43:24 +0300 Oleg Nesterov <[email protected]> wrote:
> SИbastien DuguИ wrote:
> >
> > +struct task_struct *good_sigevent(sigevent_t *event)
> > +{
> > + struct task_struct *task = current->group_leader;
> > +
> > + if ((event->sigev_notify & SIGEV_THREAD_ID) == SIGEV_THREAD_ID) {
> > + task = find_task_by_pid(event->sigev_notify_thread_id);
> > +
> > + if (!task || task->tgid != current->tgid)
> > + return NULL;
> > + } else if (event->sigev_notify == SIGEV_SIGNAL) {
>
> No, no, we can't use "else" here,
>
> > + if (event->sigev_signo <= 0 || event->sigev_signo > SIGRTMAX)
>
> because we skip the check above in SIGEV_THREAD_ID case.
Right, will fix this.
>
> This way any user can crash the kernel with a minimal effort.
Well I tried, no crash, just the signal failing to be delivered.
Thanks,
Sébastien.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
