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Jesse Hills
806246b858
- on_recv/on_send read the recv/send callback pointer once into a local; a concurrent esp_now_unregister/deinit on the main loop can no longer null it between the guard and the call (a runtime-reachable null-deref via disable()). - on_resp fails a truncated RESP with ESP_ERR_INVALID_RESPONSE instead of returning the co-processor status with a zeroed payload, and logs the oversized-ret_len clamp (a wire-format-drift signal). - register_recv_cb/register_send_cb confirm ensure_setup() succeeded before arming the callback, so a failed setup leaves the pointer null.
