CVE-2021-47328

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

scsi: iscsi: Fix conn use after free during resets

If we haven't done a unbind target call we can race where

iscsi_conn_teardown wakes up the EH thread and then frees the conn while

those threads are still accessing the conn ehwait.

We can only do one TMF per session so this just moves the TMF fields from

the conn to the session. We can then rely on the

iscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call

to remove the target and it's devices, and know after that point there is

no device or scsi-ml callout trying to access the session.