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(-) -- 2.31.1
