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Christoph Hellwig 4c8cf6bd28 block: require LBA dma_alignment when using PI 
The block layer PI generation / verification code expects the bio_vecs
to have at least LBA size (or more correctly integrity internal)
granularity.  With the direct I/O alignment relaxation in 2022, user
space can now feed bios with less alignment than that, leading to
scribbling outside the PI buffers.  Apparently this wasn't noticed so far
because none of the tests generate such buffers, but since 851c4c96db
("xfs: implement XFS_IOC_DIOINFO in terms of vfs_getattr"), xfstests
generic/013 by default generates such I/O now that the relaxed alignment
is advertised by the XFS_IOC_DIOINFO ioctl.

Fix this by increasing the required alignment when using PI, although
handling arbitrary alignment in the long run would be even nicer.

Fixes: bf8d08532b ("iomap: add support for dma aligned direct-io")
Fixes: b1a000d3b8 ("block: relax direct io memory alignment")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-10-22 10:02:54 -06:00
arch for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
block block: require LBA dma_alignment when using PI 2025-10-22 10:02:54 -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 nbd: override creds to kernel when calling sock_{send,recv}msg() 2025-10-20 09:27:58 -06:00
fs iomap: open code bio_iov_iter_get_bdev_pages 2025-10-07 08:05:44 -06:00
include block: move bio_iov_iter_get_bdev_pages to block/fops.c 2025-10-07 08:05:44 -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
.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

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.