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Christoph Hellwig d152c682f0 block: add an explicit ->disk backpointer to the request_queue 
Replace the magic lookup through the kobject tree with an explicit
backpointer, given that the device model links are set up and torn
down at times when I/O is still possible, leading to potential
NULL or invalid pointer dereferences.

Fixes: edb0872f44 ("block: move the bdi from the request_queue to the gendisk")
Reported-by: syzbot <syzbot+aa0801b6b32dca9dda82@syzkaller.appspotmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20210816134624.GA24234@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-08-23 12:54:31 -06:00
arch
block block: add an explicit ->disk backpointer to the request_queue 2021-08-23 12:54:31 -06:00
certs
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Documentation
drivers block: pass a request_queue to __blk_alloc_disk 2021-08-23 12:54:30 -06:00
fs block: Introduce IOPRIO_NR_LEVELS 2021-08-18 07:21:12 -06:00
include block: add an explicit ->disk backpointer to the request_queue 2021-08-23 12:54:31 -06:00
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README 

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.