[GIT PULL] TEE fix2 for v6.17

[GIT PULL] TEE fix2 for v6.17

[Jens Wiklander]

Hello arm-soc maintainers,

Please pull this fix in the TEE subsystem.

Thanks,
Jens

The following changes since commit 8f5ae30d69d7543eee0d70083daf4de8fe15d585:

  Linux 6.17-rc1 (2025-08-10 19:41:16 +0300)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jenswi/linux-tee.git tags/tee-shm-register-fix-for-v6.17

for you to fetch changes up to d5cf5b37064b1699d946e8b7ab4ac7d7d101814c:

  tee: fix register_shm_helper() (2025-09-22 08:47:00 +0200)

----------------------------------------------------------------
TEE fix2 for v6.17

Fixing incorrect error handling for a call to iov_iter_extract_pages().

----------------------------------------------------------------
Jens Wiklander (1):
      tee: fix register_shm_helper()

 drivers/tee/tee_shm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Re: [GIT PULL] TEE fix2 for v6.17

[patchwork-bot+linux-soc]

Hello:

This pull request was applied to soc/soc.git (for-next)
by Arnd Bergmann <arnd@arndb.de>:

On Wed, 24 Sep 2025 10:34:04 +0200 you wrote:
> Hello arm-soc maintainers,
> 
> Please pull this fix in the TEE subsystem.
> 
> Thanks,
> Jens
> 
> [...]

Here is the summary with links:
  - [GIT,PULL] TEE fix2 for v6.17
    https://git.kernel.org/soc/soc/c/0a8c31049107

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [GIT PULL] TEE fix2 for v6.17

[Arnd Bergmann]

On Thu, Sep 25, 2025, at 00:10, patchwork-bot+linux-soc@kernel.org wrote:
> Hello:
>
> This pull request was applied to soc/soc.git (for-next)
> by Arnd Bergmann <arnd@arndb.de>:
>
> On Wed, 24 Sep 2025 10:34:04 +0200 you wrote:
>> Hello arm-soc maintainers,
>> 
>> Please pull this fix in the TEE subsystem.

Hi Jens,

I saw this just after I sent what I expected to be my final 
pull request for 6.17, and that is now merged.

I applied it for 6.18 for now as it appears that this is
not a recent regressen, but I could still send another
pull request with just this one patch if you think it's
urgent enough. Can you clarify whether the NULL pointer
reference that gets fixed here can normally only be triggered
by root-owned processes or also by normal users?

     Arnd

Re: [GIT PULL] TEE fix2 for v6.17

[Jens Wiklander]

Hi Arnd,

On Thu, Sep 25, 2025 at 8:45 AM Arnd Bergmann <arnd@arndb.de> wrote:
>
> On Thu, Sep 25, 2025, at 00:10, patchwork-bot+linux-soc@kernel.org wrote:
> > Hello:
> >
> > This pull request was applied to soc/soc.git (for-next)
> > by Arnd Bergmann <arnd@arndb.de>:
> >
> > On Wed, 24 Sep 2025 10:34:04 +0200 you wrote:
> >> Hello arm-soc maintainers,
> >>
> >> Please pull this fix in the TEE subsystem.
>
> Hi Jens,
>
> I saw this just after I sent what I expected to be my final
> pull request for 6.17, and that is now merged.
>
> I applied it for 6.18 for now as it appears that this is
> not a recent regressen, but I could still send another
> pull request with just this one patch if you think it's
> urgent enough. Can you clarify whether the NULL pointer
> reference that gets fixed here can normally only be triggered
> by root-owned processes or also by normal users?

It can also be triggered by normal users if they can open the tee
device. It's expected that users who need to open the tee device
belong to a special tee-client group or such. This is what it looks
like in our test setup:
$ id
uid=102(test) gid=104(test) groups=103(teeclnt),104(test)
$ ls -l /dev/tee*
crw-rw----    1 root     teeclnt   245,   0 Sep 25 06:49 /dev/tee0
crw-rw----    1 root     tee       245,  16 Sep 25 06:49 /dev/teepriv0

Where the test user has enough permissions to run the test suite.

I don't think it's that urgent.

Cheers,
Jens