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commit36369f46e9upstream. Since commit10c70d95c0("block: remove the bd_openers checks in blk_drop_partitions") we allow rereading of partition table although there are users of the block device. This has an undesirable consequence that e.g. if sda and sdb are assembled to a RAID1 device md0 with partitions, BLKRRPART ioctl on sda will rescan partition table and create sda1 device. This partition device under a raid device confuses some programs (such as libstorage-ng used for initial partitioning for distribution installation) leading to failures. Fix the problem refusing to rescan partitions if there is another user that has the block device exclusively open. Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20221130135344.2ul4cyfstfs3znxg@quack3 Fixes:10c70d95c0("block: remove the bd_openers checks in blk_drop_partitions") Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20221130175653.24299-1-jack@suse.cz [axboe: fold in followup fix] Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.