arnavsharma990 opened a new pull request, #20146:
URL: https://github.com/apache/nuttx/pull/20146
## Summary
* Add watchdog teardown to sensor_close().
* Clear user->fds before freeing the subscriber.
* Cancel the per-subscriber fetch watchdog to prevent sensor_fetch_expired()
from accessing freed memory.
## Impact
This fixes a use-after-free race in the sensor uORB upper half when
sensor_close() races with an armed fetch watchdog.
There are no API or configuration changes. The change is limited to
subscriber teardown in drivers/sensors/sensor.c.
## Testing
- Ran `tools/checkpatch.sh -f drivers/sensors/sensor.c`
- checkpatch passed with no errors.
- Verified the change mirrors the existing watchdog teardown in
sensor_poll().
- No hardware-board testing was performed.
Fixes #20145.
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