[PATCH -nect RFC v2 0/2] block: fix uaf in bd_link_disk_holder()

[Yu Kuai]

Changes in v2:
 - in order to know when bd_holder_dir will be freed, instead of changing
kobject_put(), add a new field in block_device.

Yu Kuai (2):
  block: add helpers for bd_holder_dir refcount management
  block: fix uaf for bd_holder_dir

 block/blk.h               |  3 +++
 block/genhd.c             | 33 ++++++++++++++++++++++++++++++++-
 block/holder.c            | 19 +++++++++++++------
 block/partitions/core.c   |  5 ++++-
 include/linux/blk_types.h |  1 +
 5 files changed, 53 insertions(+), 8 deletions(-)

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2.31.1