Re: [Crash-utility] [PATCH] x86_64: do not process zero size exception stack
-----Original Message-----
Hi Kazu,
>
> Apparently the following patch causes this and it's in 5.10-rc ?
>
> commit 02772fb9b68e6a72a5e17f994048df832fe2b15e
> Author: Joerg Roedel <jroedel(a)suse.de>
> Date: Mon Sep 7 15:15:43 2020 +0200
>
> x86/sev-es: Allocate and map an IST stack for #VC handler
>
> If so, it seems we should support this properly.
>
Not this one. I use 5.9.6 kernel for testing. It does not use VC handlers ( no SEV-ES
support yet).
First look in the kernel - didn’t show anything that sets 5th stack. Address seems valid.
Will dig
deeper. Might need to take a look at crash code, around ebase[] fetching.
Will send update on my findings.
ok, thanks.
I thought the above because 5.9.4 vmcore on hand doesn't show the 5th address
and 5.10.0-rc1 one does:
5.9.4:
crash> help -m
...
[0]: fffffe0000009000 fffffe000000b000 fffffe000000d000 fffffe000000f000
0000000000000000 0000000000000000 0000000000000000
5.10.0-rc1:
[0]: fffffe0000009000 fffffe000000b000 fffffe000000d000 fffffe000000f000
fffffe0000012000 0000000000000000 0000000000000000
> btw, hopefully we would like to release the new version (7.2.9) of crash
> next week and are preparing, so some patches might be deferred to the next
> (7.3.0 ?), especially patches for Linux 5.10.
Got it. Thanks for update.
My bigger patch that I've sent Today should definitely go post 7.2.9.
Yes, that will. Thanks for understanding.
Kazu