[Bionic][PATCH 0/2] Fixes for LP:1759279

[Joseph Salisbury]

BugLink: http://bugs.launchpad.net/bugs/1759279

== Bionic Justification ==
This bug causes a kernel panic with null pointer dereference, when RAID10 
rebuild target is disconnected during rebuild. It's sporadical issue.

Commit 39772f0a7be3 was cc'd to usptream stable and is in 4.15.8, so it is already 
in Bionic -proposed.  However, commit f2785b527cda is not in upstream stable 4.15.y, 
so it needs to be pulled into Bionic.

== Fixes ==
f2785b527cda ("md: document lifetime of internal rdev pointer.")
39772f0a7be3 ("md: only allow remove_and_add_spares when no sync_thread running.")

NeilBrown (2):
  md: document lifetime of internal rdev pointer.
  md: only allow remove_and_add_spares when no sync_thread running.

 drivers/md/md.c     |  4 ++++
 drivers/md/raid1.h  | 12 ++++++++++++
 drivers/md/raid10.h | 13 +++++++++++++
 drivers/md/raid5.h  | 12 ++++++++++++
 4 files changed, 41 insertions(+)

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2.7.4