Comment 1 for bug 1822271

Skipped (already applied for bug #1817784): "scsi: libsas: Fix rphy phy_identifier for PHYs with end devices attached".

Skipped (already applied for CVE-2019-9213); "mm: enforce min addr even if capable() in expand_downwards()".

Skipped (reasoning below): "scsi: libiscsi: Fix race between iscsi_xmit_task and iscsi_complete_task".
-> Reasoning: The race seems to depend on having the locking split into back_lock and fwd_lock. This split got introduced in v3.15 upstream but was reverted in Xenial for bug #1517142 in 4.4.0-9.24. Without that the code which gets modified is still holding the bigger lock, so should be safe. At least these things should get applied together and rather with more testing.