[ymodem] Check the file path's legitimacy of 'sy' command
* Change Logs:
* Date Author Notes
* 2019-12-09 Steven Liu the first version
+ * 2021-04-14 Meco Man Check the file path's legitimacy of 'sy' command
*/
#include <rtthread.h>
@@ -219,6 +220,12 @@ static rt_err_t sy(uint8_t argc, char **argv)
const char *file_path;
rt_device_t dev;
+ if (argc < 2)
+ {
+ rt_kprintf("invalid file path.\n");
+ return -RT_ERROR;
+ }
+
if (argc > 2)
dev = rt_device_find(argv[2]);
else
