On 11/7/24 6:09 AM, Peter Maydell wrote:
On Wed, 6 Nov 2024 at 18:08, Stefan Berger <stef...@linux.vnet.ibm.com> wrote:

From: Stefan Berger <stef...@linux.ibm.com>

To avoid AppArmor-related test failures when functional test are run from
somewhere under /mnt, adjust the path to swtpm's state to use an AppArmor-
supported path, such as /var/tmp, which is provided by the python function
tempfile.TemporaryDirectory().

An update to swtpm's AppArmor profile is also being done to support /var/tmp.

Link: 
https://lore.kernel.org/qemu-devel/CAFEAcA8A=kwlttz+nua-mpzqkaejw5sroyzruzne2tb6vmo...@mail.gmail.com/
Link: https://github.com/stefanberger/swtpm/pull/944
Signed-off-by: Stefan Berger <stef...@linux.ibm.com>

Thanks for writing this patch. I can confirm that the test now
runs OK on my Ubuntu setup, so

That's good to hear. However, it surprises me because the tests probably use /var/tmp/ as temp dir and that's no supported in the AppArmor profile yet.


Tested-by: Peter Maydell <peter.mayd...@linaro.org>

---
  tests/functional/test_arm_aspeed.py | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/functional/test_arm_aspeed.py 
b/tests/functional/test_arm_aspeed.py
index 9761fc06a4..a574b1e521 100644
--- a/tests/functional/test_arm_aspeed.py
+++ b/tests/functional/test_arm_aspeed.py
@@ -227,11 +227,11 @@ def test_arm_ast2600_evb_buildroot_tpm(self):

          image_path = self.ASSET_BR2_202302_AST2600_TPM_FLASH.fetch()

-        socket_dir = tempfile.TemporaryDirectory(prefix="qemu_")
-        socket = os.path.join(socket_dir.name, 'swtpm-socket')

I think it would be helpful to add a brief comment here:
            # We must put the TPM state dir in /tmp/, not the build dir,
            # because some distros use AppArmor to lock down swtpm and
            # restrict the set of locations it can write to.

just as a guard against somebody in future coming along and
trying to clean up/rationalize where tests are creating their
temporary files.

+        tpmstate_dir = tempfile.TemporaryDirectory(prefix="qemu_")
+        socket = os.path.join(tpmstate_dir.name, 'swtpm-socket')

          subprocess.run(['swtpm', 'socket', '-d', '--tpm2',
-                        '--tpmstate', f'dir={self.vm.temp_dir}',
+                        '--tpmstate', f'dir={tpmstate_dir.name}',
                          '--ctrl', f'type=unixio,path={socket}'])

          self.vm.add_args('-chardev', f'socket,id=chrtpm,path={socket}')
--
2.34.1

thanks
-- PMM



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