kthread: Don't allocate kthread_struct for init and umh
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.18.3 by commit 9538e524714c1f35fd918cf241bd844374188115, it was introduced in version v5.17 by commit 40966e316f86b8cfd83abd31ccb4df729309d3e7. For more details please see the references link.