watchdog: Fix possible use-after-free in wdt_startup()
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 v4.14.240 by commit 0ac50a76cf3cd63db000648b3b19f3f98b8aaa76. For more details please see the references link.