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

[Sumit Garg]

On Wed, Mar 18, 2026 at 01:39:41PM +0100, Arnd Bergmann wrote:
> 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.

Thanks Arnd for picking up this fix. Last week I was on business travel
hence the delay in my response. I see Sasha already picked it up for
backports.

-Sumit