Re: [PATCH 1/1] pid_ns: move pid_ns_release_proc() fromproc_flush_task() to zap_pid_ns_processes()
From: Oleg Nesterov
Date: Thu Jun 24 2010 - 09:03:53 EST
On 06/24, Eric W. Biederman wrote:
> Oleg Nesterov <oleg@xxxxxxxxxx> writes:
> > This is mostly cleanup and optimization, but also fixes the bug.
> Oleg with respect to your other patches I think they are some of
> the best ones we have on the table.
> > proc_flush_task() checks upid->nr == 1 to detect the case when
> > a sub-namespace exits. However, this doesn't work in case when
> > a multithreaded init execs and calls release_task(old_leader),
> > the old leader has the same pid 1.
> > Move pid_ns_release_proc() to zap_pid_ns_processes(), it is called
> > when we know for sure that init is exiting.
> This actually guarantees a use after free for the namespace init:
Yes, thanks. I am stupid.
Please ignore the patch.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/