CVE-2022-50875 of: overlay: fix null pointer dereferencing in find_dup_cset_node_entry() and find_dup_cset_prop()

In the Linux kernel, the following vulnerability has been resolved: of: overlay: fix null pointer dereferencing in finddupcsetnodeentry and finddupcsetprop When kmalloc fail to allocate memory in kasprintf, fn1 or fn2 will be NULL, and strcmp will cause null pointer dereference...