diff -up microcode_ctl-1.17/microcode_ctl.c.getopt microcode_ctl-1.17/microcode_ctl.c
--- microcode_ctl-1.17/microcode_ctl.c.getopt	2011-12-22 13:15:55.073783568 +0100
+++ microcode_ctl-1.17/microcode_ctl.c	2011-12-22 13:14:22.000000000 +0100
@@ -151,7 +151,8 @@ int main(int argc, char *argv[])
 				break;
 
 			case 'd':
-				strcpy(device, optarg);
+				strncpy(device, optarg, sizeof(device));
+				device[sizeof(device)-1] = '\0'; /* ensure null terminated */
 				break;
 
 			case 'u': /* do a microcode upload */
@@ -160,7 +161,8 @@ int main(int argc, char *argv[])
 
 			case 'f': /* set microcode file to optarg and upload */
 				upload++;
-				strcpy(filename, optarg);
+				strncpy(filename, optarg, sizeof(filename));
+				filename[sizeof(filename)-1] = '\0'; /* ensure null terminated */
 				break;
 
 			case '?':