serial: uart_async_rx: Avoid possible division by zero

Ensures that config->but_cnt is not zero. Fixes #66800 CID #338107 Signed-off-by: Flavio Ceolin <[email protected]>
zephyrproject-rtos · Jul 15, 2024 · cf8ef7a · cf8ef7a
1 parent d2a4522
commit cf8ef7a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/serial/uart_async_rx.c b/drivers/serial/uart_async_rx.c
@@ -137,6 +137,7 @@ void uart_async_rx_reset(struct uart_async_rx *rx_data)
 int uart_async_rx_init(struct uart_async_rx *rx_data,
 		       const struct uart_async_rx_config *config)
 {
+	__ASSERT_NO_MSG(config->buf_cnt > 0);
 	__ASSERT_NO_MSG(config->length / config->buf_cnt <= UINT8_MAX);
 	memset(rx_data, 0, sizeof(*rx_data));
 	rx_data->config = config;