CVE-2021-47427

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

scsi: iscsi: Fix iscsi_task use after free

Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn")

added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but

then also changed the handling of the case where we detect an already

completed task where we now end up doing a goto to the common put/cleanup

code. This results in a iscsi_task use after free, because the common

cleanup code will do a put on the iscsi_task.

This reverts the goto and moves the iscsi_get_conn() to after we've checked

if the iscsi_task is valid.