[PATCH v3 0/3] Fix high cpu usage of ubi_bgt thread and an uaf problem

[Zhihao Cheng]

v1->v2:
  Update fm pool filling strategy, consider reserve enough free count
  for fastmap non anchor pebs while filling fm_wl_pool.
  Remove 'fm_next_anchor' and check 'fm_anchor' during wear leveling.
  Check wl_pool for free peb before wear leveling.
v2->v3:
  1. Don't reserve beb_revd_pebs while filling fm pool.
  2. Fix an uaf in ubi_create_volume()'s error handling path.

Zhihao Cheng (3):
  ubi: fastmap: Fix high cpu usage of ubi_bgt by making sure wl_pool not
    empty
  ubi: fastmap: Check wl_pool for free peb before wear leveling
  ubi: ubi_create_volume: Fix use-after-free when volume creation failed

 drivers/mtd/ubi/fastmap-wl.c | 121 ++++++++++++++++++++++++++++-------
 drivers/mtd/ubi/fastmap.c    |  11 ----
 drivers/mtd/ubi/ubi.h        |   4 +-
 drivers/mtd/ubi/vmt.c        |   1 -
 drivers/mtd/ubi/wl.c         |  33 ++++++----
 drivers/mtd/ubi/wl.h         |   2 +
 6 files changed, 123 insertions(+), 49 deletions(-)

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2.31.1