src/hotspot/share/prims/jvm.cpp

*** 2676,2689 ****
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
    // Reject count values that are negative signed values converted to
    // unsigned; see bug 4399518, 4417214
!   if ((intptr_t)count <= 0) return -1;
  
    int result = os::vsnprintf(str, count, fmt, args);
!   if (result > 0 && (size_t)result >= count) {
      result = -1;
    }
  
    return result;
  }
--- 2676,2689 ----
  
  ATTRIBUTE_PRINTF(3, 0)
  int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
    // Reject count values that are negative signed values converted to
    // unsigned; see bug 4399518, 4417214
!   if ((intptr_t)count < 0) return -1;
  
    int result = os::vsnprintf(str, count, fmt, args);
!   if (count > 0 && result > 0 && (size_t)result >= count) {
      result = -1;
    }
  
    return result;
  }