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UART echo: fix race conditions causing null pointer dereference (#2092)

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Co-authored-by: 0xchocolate <0xchocolate@users.noreply.github.com>
Co-authored-by: あく <alleteam@gmail.com>
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0xchocolate 2022-12-07 03:46:50 -08:00 committed by GitHub
parent 9a21dae29c
commit e42dda7cfb
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1 changed files with 5 additions and 5 deletions
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10
applications/debug/uart_echo/uart_echo.c
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@ -215,26 +215,26 @@ static UartEchoApp* uart_echo_app_alloc() {
view_dispatcher_add_view(app->view_dispatcher, 0, app->view); view_dispatcher_add_view(app->view_dispatcher, 0, app->view);
view_dispatcher_switch_to_view(app->view_dispatcher, 0); view_dispatcher_switch_to_view(app->view_dispatcher, 0);
app->worker_thread = furi_thread_alloc_ex("UsbUartWorker", 1024, uart_echo_worker, app);
furi_thread_start(app->worker_thread);
// Enable uart listener // Enable uart listener
furi_hal_console_disable(); furi_hal_console_disable();
furi_hal_uart_set_br(FuriHalUartIdUSART1, 115200); furi_hal_uart_set_br(FuriHalUartIdUSART1, 115200);
furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, uart_echo_on_irq_cb, app); furi_hal_uart_set_irq_cb(FuriHalUartIdUSART1, uart_echo_on_irq_cb, app);
app->worker_thread = furi_thread_alloc_ex("UsbUartWorker", 1024, uart_echo_worker, app);
furi_thread_start(app->worker_thread);
return app; return app;
} }
static void uart_echo_app_free(UartEchoApp* app) { static void uart_echo_app_free(UartEchoApp* app) {
furi_assert(app); furi_assert(app);
furi_hal_console_enable(); // this will also clear IRQ callback so thread is no longer referenced
furi_thread_flags_set(furi_thread_get_id(app->worker_thread), WorkerEventStop); furi_thread_flags_set(furi_thread_get_id(app->worker_thread), WorkerEventStop);
furi_thread_join(app->worker_thread); furi_thread_join(app->worker_thread);
furi_thread_free(app->worker_thread); furi_thread_free(app->worker_thread);
furi_hal_console_enable();
// Free views // Free views
view_dispatcher_remove_view(app->view_dispatcher, 0); view_dispatcher_remove_view(app->view_dispatcher, 0);