[PATCH v4 0/5] md: fix uaf for sync_thread

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

Changes in v4:
 - remove patch 2 from v3
 - fix sparse errors and warnings from v3, in order to do that, all access
 to md_thread need to be modified, patch 2-4 is splited to avoid a huge
 patch.

Changes in v3:
 - remove patch 3 from v2
 - use rcu instead of a new lock

Changes in v2:
 - fix a compile error for md-cluster in patch 2
 - replace spin_lock/unlock with spin_lock/unlock_irq in patch 5
 - don't wake up inside the new lock in md wakeup_thread in patch 5

Yu Kuai (5):
  md: pass a md_thread pointer to md_register_thread()
  md: factor out a helper to wake up md_thread directly
  md: add a helper to access md_thread() directly
  dm-raid: remove useless checking in raid_message()
  md: protect md_thread with rcu

 drivers/md/dm-raid.c      |   4 +-
 drivers/md/md-bitmap.c    |  28 +++++++---
 drivers/md/md-cluster.c   |  11 ++--
 drivers/md/md-multipath.c |   6 +--
 drivers/md/md.c           | 108 ++++++++++++++++++++------------------
 drivers/md/md.h           |  21 +++++---
 drivers/md/raid1.c        |   9 ++--
 drivers/md/raid1.h        |   2 +-
 drivers/md/raid10.c       |  21 ++++----
 drivers/md/raid10.h       |   2 +-
 drivers/md/raid5-cache.c  |  14 ++---
 drivers/md/raid5.c        |  19 +++----
 drivers/md/raid5.h        |   2 +-
 13 files changed, 132 insertions(+), 115 deletions(-)

-- 
2.39.2