On some phones (tester: Honor BKQ-N49, Android 17) Xbox sign-in stopped with
"the Xbox helper stopped with exit code 1" before Microsoft's page opened.
The backend asks the app to read and save credentials over a socket and waits
10 s for each reply. The app sealed credentials with a StrongBox-backed
Keystore key, and each StrongBox operation took 7-15 s on that phone, so the
backend gave up. The app still finished those saves afterwards, leaving a
record without a username that every later attempt had to read back slowly.
- Seal new store credentials with a TEE Keystore key (v2 envelopes); v1
envelopes still open with the old key and move to v2 on their next write.
- A sign-in discards an Xbox record without a username (an unfinished
sign-in) before starting the backend.
- The backend waits 30 s for the app's credential reply.
- The backend names the failing step instead of only credential-io (socket
connect/exchange, session lock, missing socket name/port/key), and falls
back to a keyed 127.0.0.1 port when the abstract socket is refused.
- The app's credential listener logs and retries accept errors, serves each
connection on its own thread, and logs slow requests with per-stage times.
Refs #1337, #1300
Co-authored-by: KeegantheVeganat0r <58369898+KeegantheVeganat0r@users.noreply.github.com>
* Restrict Xbox credentials to host backends and lease game launches
* Verify mapped PRoot backend images and retry lease heartbeat timeouts
* Bound Xbox backend shutdown and isolate service socket lifetimes
* Keep unique Xbox service sockets within Unix address limits
* Own licensed launch directories and recover abandoned views safely
* Serialize Xbox account revocation with sign-in commits and launch authorization
