CVE-2024-47743 KEYS: prevent NULL pointer dereference in find_asymmetric_key()

In the Linux kernel, the following vulnerability has been resolved: KEYS: prevent NULL pointer dereference in findasymmetrickey In findasymmetrickey, if all NULLs are passed in the id0,1,2 arguments, the kernel will first emit WARN but then have an oops because id2 gets dereferenced anyway. Add t...