linux-kernel - Re: [RFC][PATCH 00/17] Fix up the recent SRSO patches

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Date: Mon, 22 Apr 2024 07:01:02 +0000
From: a-development@...teo.de
To: Borislav Petkov <bp@...en8.de>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, peterz@...radead.org,
 David.Kaplan@....com, Andrew.Cooper3@...rix.com, jpoimboe@...nel.org,
 gregkh@...uxfoundation.org
Subject: Re: [RFC][PATCH 00/17] Fix up the recent SRSO patches

Hello. I have installed the kernel through 
https://aur.archlinux.org/packages/linux-mainline and noticed that SRSO 
is disabled. "Speculative Return Stack Overflow: IBPB-extending 
microcode not applied!"

cat /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow
Vulnerable: Safe RET, no microcode

So far, I have been succesfully suspending the one night I used it.

Assuming this is per-default, I've installed the kernel module for my 
PCIe Capture card and testing it.

Any new instructions?

Thanks

On 17.04.2024 11:12, Borislav Petkov wrote:
> On Wed, Apr 17, 2024 at 08:08:53AM +0000, a-development@...teo.de 
> wrote:
>> Today I failed to suspend, and the spec_rstack thing was off.
>> 
>> https://up.tail.ws/txt/non-working-suspend-2.txt
> 
> Ok, but please do not top-post. Put your reply underneath the next
> you're replying to and remove the rest of the quoted text like I just
> did.
> 
> So this could be caused by the proprietary module or something else.
> 
> If you want this debugged, you'd have to try to reproduce it with the
> latest upstream kernel from here:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> 
> after having removed the propietary module.
> 
> HTH.