Re: [GIT PULL] TEE shared memory fix for 7.0

[Arnd Bergmann]

On Tue, Mar 17, 2026, at 13:53, Marco Felsch wrote:
> On 26-03-17, Jens Wiklander wrote:
>> 
>> I'm under the impression that it is a fix rather than an improvement.
>> However, since it has been stewing for a while, it's clearly not
>> urgent. I don't have anything specific on the bug fix, other than that
>> we're supposed to stop taking those refcounts. Perhaps Sumit, Marco,
>> or Matthew can add something?
>
> It's a long outstanding fix regarding memory page management. The
> userspace gets informed about this memory API misuse via a warning print
> incl. a backtrace. This gets triggered only if userspace uses OP-TEE
> trusted-keys or the OP-TEE EFI variables. Therefore I would like to get
> it into 7.0 but 7.1 fine too.

Yes, that is clearly a bugfix. I think we'd also want this to be
marked 'Cc: stable@xxxxxxxxxxxxxxx' as it should also apply
to 6.18-LTS and 6.19. Greg tends to also pick up bugfixes that
don't have this, but it's generally better to be explicit here,
especially when it's not obvious what the impact of the fix is.

I've merge the pull request now. If you think this should be
in 6.18-lts and Greg doesn't pick it up by himself, maybe
let him know about it.

      Arnd