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824afb9b04
When blk_unregister_queue() is called from add_disk() failure path, there is race in registering/unregistering elevator queue kobject from the two code paths, because commit559dc11143("block: move elv_register[unregister]_queue out of elevator_lock") moves elevator queue register/unregister out of elevator lock. Fix the race by removing elevator after deleting disk->queue_kobj, because kobject_del(&disk->queue_kobj) drains in-progress sysfs show()/store() of all attributes. Fixes:559dc11143("block: move elv_register[unregister]_queue out of elevator_lock") Reported-by: Nilay Shroff <nilay@linux.ibm.com> Suggested-by: Nilay Shroff <nilay@linux.ibm.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Nilay Shroff <nilay@linux.ibm.com> Link: https://lore.kernel.org/r/20250508085807.3175112-3-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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 reStructuredText 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.