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FIX #7693: concurrent task execution: fixed dereference of NULL #7694

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FIX #7693: concurrent task execution: fixed dereference of NULL #7694

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Commits on Oct 4, 2024

  1. concurrent task execution: fixed dereference of NULL pointer 

    In the function TaskConcurrentCancelCheck() the pointer "task"
was utilized after checking against NULL, which can lead
to dereference of the null pointer.
To avoid the problem, added a separate handling of the case
when the pointer is null with an interruption of execution.

Fixes: 1f8675d("nonblocking concurrent task execution via background workers")

Signed-off-by: Maksim Korotkov <m.korotkov@postgrespro.ru>
    @ProjectMutilation
    ProjectMutilation committed Oct 4, 2024
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