RTEMS | fix(posix): Prevent deadlock in aio_suspend (CID 1667285) (!954)

Tue Jan 27 13:59:26 UTC 2026

MITHILESH MATTAPALLI created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/954

Project:Branches: mithileshm/rtems:fix-posix-deadlock-1667285 to rtems/rtos/rtems:main
Author:   MITHILESH MATTAPALLI

Coverity analysis identified a concurrency issue in the aio_suspend() function:

CID 1667285 (Deadlock): The function held the global aio_request_queue.mutex while attempting to acquire a specific request's suspendcbp-\>mutex. This violated lock ordering if a worker thread held the request lock and waited for the global queue lock. The fix drops the global lock before acquiring the request lock and re-acquires it afterwards to maintain correct lock ordering.

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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/954
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