CVE-2024-50281

In the Linux kernel, the following vulnerability has been resolved:

KEYS: trusted: dcp: fix NULL dereference in AEAD crypto operation

When sealing or unsealing a key blob we currently do not wait for

the AEAD cipher operation to finish and simply return after submitting

the request. If there is some load on the system we can exit before

the cipher operation is done and the buffer we read from/write to

is already removed from the stack. This will e.g. result in NULL

pointer dereference errors in the DCP driver during blob creation.

Fix this by waiting for the AEAD cipher operation to finish before

resuming the seal and unseal calls.