Jens Gutermuth 07d1e19107 improve thread safety in esp_timer ...

Inadequate locking in the esp_timer component allowed corruption
of the s_timers linked list:

1. timer_armed(timer) returns false
2. another task arms the timer and adds it to s_timers
3. the list is locked
4. the timer is inserted into s_timers again

The last step results in a loop in the s_timers list, which causes
an infinite loop when iterated. This change always locks the
list before checking if the timer is already armed avoiding
the data race.

2023-05-02 20:22:24 +02:00

24 KiB

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