Re: [4.9-rc3] BUG: unable to handle kernel paging request at ffffc900144dfc60

* Linus Torvalds [off-list ref] wrote:

On Wed, Nov 2, 2016 at 4:50 AM, Tetsuo Handa
[off-list ref] wrote:

quoted

quoted

So I _think_ the fix is to just remove this. Perhaps something like
the attached? Adding scheduler people since this is in their code..

That is not sufficient, for another Oops occurs inside stack_not_used().
Since I don't want to break stack_not_used(), can we tolerate nested
try_get_task_stack() usage and protect the whole sched_show_task()?

Sure, looks good to me.

But as Andy says, we should probably apply my patch too, just to get
rid of the useless hex printk and the ugly ifdeffery.

Agreed, and I have applied both fixes to sched/urgent.

Thanks,

	Ingo