Re: perf: fuzzer BUG: KASAN: stack-out-of-bounds in __unwind_start

From: Peter Zijlstra
Date: Tue Nov 29 2016 - 14:52:18 EST

On Tue, Nov 29, 2016 at 11:39:35AM -0800, Paul E. McKenney wrote:
> On Tue, Nov 29, 2016 at 06:10:38PM +0100, Peter Zijlstra wrote:

> > It mostly works, most of the time, and that seems to be what Linus
> > wants, since its really the best we can have given the constraints. But
> > for debugging, when you have a UART, it totally blows.
> UART??? They still make those things??? ;-)

Yes, most computer like devices actually have them, trouble is, most
consumer devices don't have the pins exposed. Luckily most server class
hardware still does.

And they're absolutely _awesome_ for debugging; getting data out is a
matter of trivial MMIO poll loops. Rock solid stuff.