When using gcc static analyzer (-fanalyzer) with gcc 13.2 the following issue is reported :
/jdk/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c: In function 'get_jvmticks':
/jdk/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c:208:24: warning: use of uninitialized value 'systemTicks' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
  208 | pticks->usedKernel = systemTicks;

vsscanf usually/normally reads the systemTicks info from /proc file system. see
https://github.com/openjdk/jdk/blob/45726a1f8b8f76586037867a32b82f8ab9b96937/src/jdk.management/linux/native/libmanagement_ext/UnixOperatingSystem.c#L163
but we never check that the *exact* number of params is read with vsscanf :
n = vsscanf(tmp, fmt, args);
So potentially we could get a non complete info without systemTicks and the call would still succeed.
So better initialize systemTicks , to make sure we have at least a defined value in the unlikely event that vsscanf is not able to get the system ticks info.