Re: port-amd64/58366: KASLR broken

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Thu, 27 Jun 2024 20:36:34 +0200
> From: Harold Gutch <logix%foobar.franken.de@localhost>
> 
> On Tue, Jun 25, 2024 at 06:05:01PM +0000, Taylor R Campbell wrote:
> >  Can you try the patch on top of the first revision you found with
> >  broken prekern?
> >  
> >  If that works, time for another round of bisection, I guess!
> 
> I am not 100% sure, but it might be
> https://mail-index.netbsd.org/source-changes/2024/03/25/msg150542.html
> , however I don't see where aes_sse2_selftest() or 
> aes_sse2_xts_update_selftest() might be calling snprintb().
> 
> There might also be some undefined behavior involved somewhere as not
> every boot panics - it's hard to say how often it happens, but I'd put
> it at around p=50%.  With a source tree from just before that change I
> have so far not encountered this panic a single time.
> 
> So, I'd say your patch has improved things but the snprintb() issue
> also needs to be addressed.

Bizarre!

Can you:

1. update to the snprintb change,
2. apply the pmap directmap patch I attached earlier,
3. put db_stacktrace() (#include <ddb/ddb.h>) at the top of snprintb_m,
and
4. share dmesg when it panics?