global/global_context: always add '\0' after strncpy()

see also f35fa1c58cf24275458cb83097c57bdfd1184cf8

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/global/global_context.cc b/src/global/global_context.cc
index 1841317fde480548d06643b089113d0b6204f832..b6d42eaffec53f214c8f1e73b8c58005e3b52040 100644 (file)
--- a/src/global/global_context.cc
+++ b/src/global/global_context.cc
@@ -57,10 +57,12 @@ int note_io_error_event(
 {
   g_eio = true;
   if (devname) {
-    strncpy(g_eio_devname, devname, sizeof(g_eio_devname));
+    strncpy(g_eio_devname, devname, sizeof(g_eio_devname) - 1);
+    g_eio_devname[sizeof(g_eio_devname) - 1] = '\0';
   }
   if (path) {
-    strncpy(g_eio_path, path, sizeof(g_eio_path));
+    strncpy(g_eio_path, path, sizeof(g_eio_path) - 1);
+    g_eio_path[sizeof(g_eio_path) - 1] = '\0';
   }
   g_eio_error = error;
   g_eio_iotype = iotype;