CVE-2024-43874 crypto: ccp - Fix null pointer dereference in __sev_snp_shutdown_locked

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix null pointer dereference in sevsnpshutdownlocked Fix a null pointer dereference induced by DEBUGTESTDRIVERREMOVE. Return from sevsnpshutdownlocked if the pspdevice or the sevdevice structs are not initialized...