virt plugin: fix truncation warning

src/virt.c: In function ‘refresh_lists’:
src/virt.c:2123:61: warning: ‘%u’ directive output may be truncated writing between 1 and 10 bytes into a region of size 5 [-Wformat-truncation=]
   snprintf(number_string, sizeof(number_string), "interface-%u", number);
                                                             ^~
src/virt.c:2123:50: note: directive argument in the range [1, 2147483647]
   snprintf(number_string, sizeof(number_string), "interface-%u", number);
                                                  ^~~~~~~~~~~~~~
src/virt.c:2123:3: note: ‘snprintf’ output between 12 and 21 bytes into a destination of size 15
   snprintf(number_string, sizeof(number_string), "interface-%u", number);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/src/virt.c b/src/virt.c
index 12008f8..e97fd84 100644 (file)
--- a/src/virt.c
+++ b/src/virt.c
@@ -2105,7 +2105,7 @@ static int add_interface_device(struct lv_read_state *state, virDomainPtr dom,
   struct interface_device *new_ptr;
   int new_size =
       sizeof(state->interface_devices[0]) * (state->nr_interface_devices + 1);
-  char *path_copy, *address_copy, number_string[15];
+  char *path_copy, *address_copy, number_string[21];
 
   if ((path == NULL) || (address == NULL))
     return EINVAL;