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Hans Holmberg 0d92a3eaa6 null_blk: set dma alignment to logical block size
This driver assumes that bio vectors are memory aligned to the logical
block size, so set the queue limit to reflect that.

Unless we set up the limit based on the logical block size, we will go
out of page bounds in copy_to_nullb / copy_from_nullb.

Apparently this wasn't noticed so far because none of the tests generate
such buffers, but since commit 851c4c96db ("xfs: implement
XFS_IOC_DIOINFO in terms of vfs_getattr") xfstests generates unaligned
I/O, which now lead to memory corruption when using null_blk devices
with 4k block size.

Fixes: bf8d08532b ("iomap: add support for dma aligned direct-io")
Fixes: b1a000d3b8 ("block: relax direct io memory alignment")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-10-31 09:03:12 -06:00
arch for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
block blk-crypto: use BLK_STS_INVAL for alignment errors 2025-10-30 08:52:57 -06:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto bpf-next-6.18 2025-09-30 17:58:11 -07:00
Documentation for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
drivers null_blk: set dma alignment to logical block size 2025-10-31 09:03:12 -06:00
fs iomap: open code bio_iov_iter_get_bdev_pages 2025-10-07 08:05:44 -06:00
include block: make REQ_OP_ZONE_OPEN a write operation 2025-10-28 07:52:55 -06:00
init Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
io_uring for-6.18/io_uring-20250929 2025-10-02 09:56:23 -07:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
kernel Kernel Concurrency Sanitizer (KCSAN) updates for v6.18 2025-10-02 08:31:44 -07:00
lib for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm arm64 updates for 6.18 2025-09-29 18:48:39 -07:00
net bpf-next-6.18 2025-09-30 17:58:11 -07:00
rust for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
samples for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
scripts Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
security bitmap-for-6.18 2025-10-02 08:57:03 -07:00
sound bitmap-for-6.18 2025-10-02 08:57:03 -07:00
tools for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
usr gen_init_cpio: add -a <data_align> as reflink optimization 2025-08-20 16:02:56 -07:00
virt Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD 2025-07-29 08:36:42 -04:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap 7 hotfixes. 4 are cc:stable and the remainder address post-6.16 issues or 2025-09-28 09:32:00 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Delete inactive maintainers from AF_XDP 2025-09-25 13:18:22 +02:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
Makefile Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.