1 files changed, 5 insertions, 1 deletions

diff --git a/plugins/check_ntp_time.c b/plugins/check_ntp_time.c
index 3e23d0bf..2d9a6f40 100644
--- a/plugins/check_ntp_time.c
+++ b/plugins/check_ntp_time.c
@@ -43,6 +43,7 @@
 #include "thresholds.h"
 #include "check_ntp_time.d/config.h"
 #include <netinet/in.h>
+#include <string.h>
 #include <sys/socket.h>
 
 static int verbose = 0;
@@ -395,7 +396,10 @@ static offset_request_wrapper offset_request(const char *host, const char *port,
                         .sun_family = AF_UNIX,
                 };
 
-                strncpy(unix_socket.sun_path, host, strlen(host));
+                if (strlen(host) > sizeof(unix_socket.sun_path)) {
+                        die(STATE_UNKNOWN, "host argument is too long (%lu) for a socket path\n", strlen(host));
+                }
+                strncpy(unix_socket.sun_path, host, sizeof(unix_socket.sun_path));
 
                 if (connect(socklist[0], &unix_socket, sizeof(unix_socket))) {
                         /* don't die here, because it is enough if there is one server