CVE-2024-50086 ksmbd: fix user-after-free from session log off

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix user-after-free from session log off There is racy issue between smb2 session log off and smb2 session setup. It will cause user-after-free from session log off. This add sessionlock when setting SMB2SESSIONEXPIRED and...