block: don't delete queue kobject before its children
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 v4.19.238 by commit b2001eb10f59363da930cdd6e086a2861986fa18, it was introduced in version v4.16 by commit 2c2086afc2b8b974fac32cb028e73dc27bfae442. For more details please see the references link.