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Fengnan Chang 4d0e1f2139 blk-mq: use queue_hctx in blk_mq_map_queue_type
Some caller of blk_mq_map_queue_type now didn't grab
'q_usage_counter', such as blk_mq_cpu_mapped_to_hctx, so we need
protect 'queue_hw_ctx' through rcu.

Also checked all other functions, no more missed cases.

Fixes: 89e1fb7cef ("blk-mq: fix potential uaf for 'queue_hw_ctx'")
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Fengnan Chang <changfengnan@bytedance.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-12-01 07:18:31 -07:00
Documentation Documentation: admin-guide: blockdev: update zloop parameters 2025-11-17 09:40:09 -07:00
LICENSES
arch - Reset the why-the-system-rebooted register on AMD to avoid stale bits 2025-10-19 04:41:27 -10:00
block blk-mq: use queue_hctx in blk_mq_map_queue_type 2025-12-01 07:18:31 -07:00
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drivers md: remove legacy 1s delay in md_notify_reboot 2025-11-30 09:42:28 +08:00
fs xfs: use blkdev_report_zones_cached() 2025-11-05 08:07:21 -07:00
include sbitmap: fix all kernel-doc warnings 2025-11-28 09:21:18 -07:00
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kernel blktrace: add support for REQ_OP_WRITE_ZEROES tracing 2025-11-03 08:30:56 -07:00
lib kfifo: add kfifo_alloc_node() helper for NUMA awareness 2025-11-28 09:20:13 -07:00
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rust rust: block: update ARef and AlwaysRefCounted imports from sync::aref 2025-11-05 18:24:10 -07:00
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MAINTAINERS MAINTAINERS: add a maintainer for zoned block device support 2025-11-19 07:37:48 -07:00
Makefile Linux 6.18-rc2 2025-10-19 15:19:16 -10:00
README

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 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.