Fix a possible truncation of the intermediate strings in the SysArch meter

1 files changed, 9 insertions, 2 deletions

diff --git a/SysArchMeter.c b/SysArchMeter.c
index 4da91007..b371acc7 100644
--- a/SysArchMeter.c
+++ b/SysArchMeter.c
@@ -62,11 +62,18 @@ static void parseOSRelease(char* buffer, size_t bufferLen) {
 }
 
 static void SysArchMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t size) {
-   static char savedString[128] = {'\0'};
+   static struct utsname uname_info;
+
+   static char savedString[
+      /* uname structure fields - manpages recommend sizeof */
+      sizeof(uname_info.sysname) +
+      sizeof(uname_info.release) +
+      sizeof(uname_info.machine) +
+      16/*markup*/ +
+      128/*distro*/] = {'\0'};
    static bool loaded_data = false;
 
    if (!loaded_data) {
-      struct utsname uname_info;
       int uname_result = uname(&uname_info);
 
       char distro[128];