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Linus Torvalds 478ad02d68 Disable FOP_DONTCACHE for now due to bugs 
This is kind of last-minute, but Al Viro reported that the new
FOP_DONTCACHE flag causes memory corruption due to use-after-free
issues.

This was triggered by commit 974c5e6139 ("xfs: flag as supporting
FOP_DONTCACHE"), but that is not the underlying bug - it is just the
first user of the flag.

Vlastimil Babka suspects the underlying problem stems from the
folio_end_writeback() logic introduced in commit fb7d3bc414
("mm/filemap: drop streaming/uncached pages when writeback completes").

The most straightforward fix would be to just revert the commit that
exposed this, but Matthew Wilcox points out that other filesystems are
also starting to enable the FOP_DONTCACHE logic, so this instead
disables that bit globally for now.

The fix will hopefully end up being trivial and we can just re-enable
this logic after more testing, but until such a time we'll have to
disable the new FOP_DONTCACHE flag.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/all/20250525083209.GS2023217@ZenIV/
Triggered-by: 974c5e6139 ("xfs: flag as supporting FOP_DONTCACHE")
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2025-05-25 15:43:36 -07:00
arch soc: fixes for 6.13, part 3 2025-05-23 08:04:13 -07:00
block SCSI fixes on 20250516 2025-05-16 10:28:22 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: algif_hash - fix double free in hash_accept 2025-05-19 13:44:16 +08:00
Documentation This is somewhat larger than what I hoped for, with a few PRs from 2025-05-22 09:15:19 -07:00
drivers Input updates for v6.15-rc7 2025-05-24 18:54:18 -07:00
fs 3 ksmbd SMB3 server fixes 2025-05-23 08:42:29 -07:00
include Disable FOP_DONTCACHE for now due to bugs 2025-05-25 15:43:36 -07:00
init init: remove unused CONFIG_CC_CAN_LINK_STATIC 2025-05-12 15:03:46 +09:00
io_uring io_uring/net: only retry recv bundle for a full transfer 2025-05-21 19:24:18 -06:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel 22 hotfixes. 13 are cc:stable and the remainder address post-6.14 issues 2025-05-25 07:48:35 -07:00
lib alloc_tag: allocate percpu counters for module tags dynamically 2025-05-25 00:53:48 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm 22 hotfixes. 13 are cc:stable and the remainder address post-6.14 issues 2025-05-25 07:48:35 -07:00
net ipsec-2025-05-21 2025-05-22 11:49:53 +02:00
rust rust: clean Rust 1.88.0's clippy::uninlined_format_args lint 2025-05-07 00:11:47 +02:00
samples tracing: samples: Initialize trace_array_printk() with the correct function 2025-05-12 13:07:22 -04:00
scripts kbuild: fix typos "module.builtin" to "modules.builtin" 2025-05-12 15:04:52 +09:00
security landlock: Improve bit operations in audit code 2025-05-12 11:38:53 +02:00
sound ALSA: hda/realtek - Add new HP ZBook laptop with micmute led fixup 2025-05-20 16:09:06 +02:00
tools selftests/tc-testing: Add an HFSC qlen accounting test 2025-05-22 11:16:51 +02:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
virt ARM: 2025-04-08 13:47:55 -07:00
.clang-format clang-format: Update the ForEachMacros list for v6.15-rc1 2025-04-13 11:03:59 +02:00
.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: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: Create intermediate vmlinux build with relocations preserved 2025-03-17 00:29:50 +09:00
.mailmap 22 hotfixes. 13 are cc:stable and the remainder address post-6.14 issues 2025-05-25 07:48:35 -07:00
.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: update SLAB ALLOCATOR maintainers 2025-04-17 20:10:06 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS 22 hotfixes. 13 are cc:stable and the remainder address post-6.14 issues 2025-05-25 07:48:35 -07:00
Makefile Linux 6.15-rc7 2025-05-18 13:57:29 -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.