ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL_CVE-2026-53198
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL A deferred byte-range lock (an SMB2_LOCK that blocks) registers an async work on conn->async_requests via setup_async_work(), with canc...