Re: [PATCH v2 4/4] proc: avoid ->f_pos overflows in proc_task_readdir() paths

Al Viro
2013-06-04T17:39:50Z

On Tue, Jun 04, 2013 at 07:14:35PM +0200, Oleg Nesterov wrote:
> > There is another bug in here as well that we may return really crazy
> > things in the case of seek simultaneous with readdir.
>
> i_mutex? both vfs_readdir() and default_llseek() take it... Anyway, this
> is another issue.

That's part of the reasons for the series I've mentioned (vfs.git#experimental);
seriously, check that up.