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b6bb99c951
Issue apache/nuttx#20145 reported a sensor fetch-watchdog lifetime regression: sensor_poll() arms a per-subscriber watchdog for fetch-only sensors with a finite interval, but sensor_close() freed the subscriber without cancelling it, letting sensor_fetch_expired() run after free. Fixed by apache/nuttx#20146, which cancels the watchdog on close. Add regression coverage in drivertest as suggested by the maintainer: open a sensor device, set a finite fetch interval, enter the poll path so the watchdog can be armed, then close while the watchdog state is relevant. Sleep past the interval so any stray timer would fire, and reopen to prove teardown was clean. The test skips gracefully when no sensor device is present, so it is safe on sim without hardware. The test does not deterministically reproduce the UAF; it verifies the observable invariant that repeated poll/close/reopen cycles complete cleanly and the device remains usable. Under KASAN or stress, a missing wd_cancel in close would be caught here. Impact: * Is new feature added? YES (new regression test coverage in testing/drivers/drivertest, no existing functionality changed). * Impact on user, build, hardware, documentation, security, compatibility? NO, test-only change. Testing: * Full build and runtime logs are provided in the PR description. Assisted-by: Muse Spark:muse-spark-1.3 Assisted-by: Claude:claude-opus Signed-off-by: Arnav Sharma <2006arnavsharma@gmail.com> |
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