CVE-2022-50648 ftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller

In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix recursive locking directmutex in ftracemodifydirectcaller Naveen reported recursive locking of directmutex with sample ftrace-direct-modify.ko: 74.762406 WARNING: possible recursive locking detected 74.762887 6.0.0-rc...