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core/mbox: fix race condition #18955

Merged
merged 1 commit into from
Nov 23, 2022
Merged

core/mbox: fix race condition #18955

merged 1 commit into from
Nov 23, 2022

Commits on Nov 22, 2022

  1. core/mbox: fix race condition 

    The mbox code contains a race condition in `mbox_put()`: When it
waits for a slot in the queue to become available, it is woken up with
IRQs enabled. It disables IRQs again as first thing, but by then
another thread may already have preempted the running thread and filled
the queue back up. In this case, a message in the queue would be
silently overwritten.
    @maribu
    maribu committed Nov 22, 2022
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