linux-kernel - Re: [regression] significant delays when secureboot is enabled since 6.10

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Message-ID: <92fbcc4c252ec9070d71a6c7d4f1d196ec67eeb0.camel@huaweicloud.com>
Date: Tue, 10 Sep 2024 11:05:04 +0200
From: Roberto Sassu <roberto.sassu@...weicloud.com>
To: Linux regressions mailing list <regressions@...ts.linux.dev>, James
 Bottomley <James.Bottomley@...senPartnership.com>, Jarkko Sakkinen
 <jarkko@...nel.org>
Cc: keyrings@...r.kernel.org, "linux-integrity@...r.kernel.org"
	 <linux-integrity@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, 
	Pengyu Ma <mapengyu@...il.com>
Subject: Re: [regression] significant delays when secureboot is enabled
 since 6.10

On Tue, 2024-09-10 at 11:01 +0200, Linux regression tracking (Thorsten
Leemhuis) wrote:
> Hi, Thorsten here, the Linux kernel's regression tracker.
> 
> James, Jarkoo, I noticed a report about a regression in
> bugzilla.kernel.org that appears to be caused by this change of yours:
> 
> 6519fea6fd372b ("tpm: add hmac checks to tpm2_pcr_extend()") [v6.10-rc1]
> 
> As many (most?) kernel developers don't keep an eye on the bug tracker,
> I decided to forward it by mail. To quote from
> https://bugzilla.kernel.org/show_bug.cgi?id=219229 :
> 
> > When secureboot is enabled,
> > the kernel boot time is ~20 seconds after 6.10 kernel.
> > it's ~7 seconds on 6.8 kernel version.
> > 
> > When secureboot is disabled,
> > the boot time is ~7 seconds too.
> > 
> > Reproduced on both AMD and Intel platform on ThinkPad X1 and T14.
> > 
> > It probably caused autologin failure and micmute led not loaded on AMD platform.
> 
> It was later bisected to the change mentioned above. See the ticket for
> more details.

Hi

I suspect I encountered the same problem:

https://lore.kernel.org/linux-integrity/b8a7b3566e6014ba102ab98e10ede0d574d8930e.camel@huaweicloud.com/

Going to provide more info there.

Roberto

> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
> 
> [1] because bugzilla.kernel.org tells users upon registration their
> "email address will never be displayed to logged out users"
> 
> P.S.: let me use this mail to also add the report to the list of tracked
> regressions to ensure it's doesn't fall through the cracks:
> 
> #regzbot introduced: 6519fea6fd372b
> #regzbot from: Pengyu Ma <mapengyu@...il.com>
> #regzbot duplicate: https://bugzilla.kernel.org/show_bug.cgi?id=219229
> #regzbot title: tpm: significant delays when secureboot is enabled
> #regzbot ignore-activity