Re: TPM/EFI issue [Was: Linux 6.12]

[Jiri Slaby <jirislaby@kernel.org>]

On 30. 11. 24, 3:49, Jarkko Sakkinen wrote:
> On Wed Nov 27, 2024 at 8:46 AM EET, Jiri Slaby wrote:
>> Cc TPM + EFI guys.
>>
>> On 17. 11. 24, 23:26, Linus Torvalds wrote:
>>> But before the merge window opens, please give this a quick test to
>>> make sure we didn't mess anything up. The shortlog below gives you the
>>> summary for the last week, and nothing really jumps out at me. A
>>> number of last-minute reverts, and some random fairly small fixes
>>> fairly spread out in the tree.
>>
>> Hi,
>>
>> there is a subtle bug in 6.12 wrt TPM (in TPM, EFI, or perhaps in
>> something else):
>> https://bugzilla.suse.com/show_bug.cgi?id=1233752
>>
>> Our testing (openQA) fails with 6.12:
>> https://openqa.opensuse.org/tests/4657304#step/trup_smoke/26
>>
>> The last good is with 6.11.7:
>> https://openqa.opensuse.org/tests/4648526
>>
>> In sum:
>> TPM is supposed to provide a key for decrypting the root partitition,
>> but fails for some reason.
>>
>> It's extremely hard (so far) to reproduce outside of openQA (esp. when
>> trying custom kernels).

Mark "X".

>> Most of the 6.12 TPM stuff already ended in (good) 6.11.7. I tried to
>> revert:
>>     423893fcbe7e tpm: Disable TPM on tpm2_create_primary() failure
>> from 6.12 but that still fails.
>>
>> We are debugging this further, this is just so you know.
>>
>> Or maybe you have some immediate ideas?
> 
> Nothing immediate but I've had to tweak quite a lot of TPM bus
> integrity protection feature so it is a possibility that I've
> made a mistake in a point or another.
> 
> Can you bisect the issue possibly?

No, see mark "X" :).

But follow the downstream bug for progress:
https://bugzilla.suse.com/show_bug.cgi?id=1233752

thanks,
-- 
js
suse labs