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Long Li a35be7a17c xfs: ensure dquot item is deleted from AIL only after log shutdown 
commit 186ac39b8a upstream.

In xfs_qm_dqflush(), when a dquot flush fails due to corruption
(the out_abort error path), the original code removed the dquot log
item from the AIL before calling xfs_force_shutdown(). This ordering
introduces a subtle race condition that can lead to data loss after
a crash.

The AIL tracks the oldest dirty metadata in the journal. The position
of the tail item in the AIL determines the log tail LSN, which is the
oldest LSN that must be preserved for crash recovery. When an item is
removed from the AIL, the log tail can advance past the LSN of that item.

The race window is as follows: if the dquot item happens to be at
the tail of the log, removing it from the AIL allows the log tail
to advance. If a concurrent log write is sampling the tail LSN at
the same time and subsequently writes a complete checkpoint (i.e.,
one containing a commit record) to disk before the shutdown takes
effect, the journal will no longer protect the dquot's last
modification. On the next mount, log recovery will not replay the
dquot changes, even though they were never written back to disk,
resulting in silent data loss.

Fix this by calling xfs_force_shutdown() before xfs_trans_ail_delete()
in the out_abort path. Once the log is shut down, no new log writes
can complete with an updated tail LSN, making it safe to remove the
dquot item from the AIL.

Cc: stable@vger.kernel.org
Fixes: b707fffda6 ("xfs: abort consistently on dquot flush failure")
Signed-off-by: Long Li <leo.lilong@huawei.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-03-19 16:08:43 +01:00
arch s390/xor: Fix xor_xc_5() inline assembly 2026-03-19 16:08:39 +01:00
block block: use trylock to avoid lockdep circular dependency in sysfs 2026-03-12 07:09:59 -04:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-01-30 10:32:12 +01:00
Documentation KVM: x86: Introduce KVM_X86_QUIRK_VMCS12_ALLOW_FREEZE_IN_SMM 2026-03-19 16:08:24 +01:00
drivers qmi_wwan: allow max_mtu above hard_mtu to control rx_urb_size 2026-03-19 16:08:42 +01:00
fs xfs: ensure dquot item is deleted from AIL only after log shutdown 2026-03-19 16:08:43 +01:00
include qmi_wwan: allow max_mtu above hard_mtu to control rx_urb_size 2026-03-19 16:08:42 +01:00
init printk changes for 6.18 2025-10-04 11:13:11 -07:00
io_uring io_uring/kbuf: check if target buffer list is still legacy on recycle 2026-03-19 16:08:42 +01:00
ipc ipc: don't audit capability check in ipc_permissions() 2026-02-26 14:59:19 -08:00
kernel tracing: Fix trace_buf_size= cmdline parameter with sizes >= 2G 2026-03-19 16:08:42 +01:00
lib debugobject: Make it work with deferred page initialization - again 2026-03-12 07:09:08 -04:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm memcg: fix slab accounting in refill_obj_stock() trylock path 2026-03-19 16:08:39 +01:00
net net-shapers: don't free reply skb after genlmsg_reply() 2026-03-19 16:08:42 +01:00
rust rust: str: make NullTerminatedFormatter public 2026-03-19 16:08:24 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:17:11 +01:00
scripts kbuild: rpm-pkg: Disable automatic requires for manual debuginfo package 2026-03-04 07:21:32 -05:00
security apparmor: fix race between freeing data and fs accessing it 2026-03-13 17:23:30 +01:00
sound ALSA: usb-audio: Improve Focusrite sample rate filtering 2026-03-19 16:08:31 +01:00
tools selftests: fix mntns iteration selftests 2026-03-19 16:08:36 +01:00
usr gen_init_cpio: Ignore fsync() returning EINVAL on pipes 2025-10-07 09:53:05 -07:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:41:44 +01:00
.clang-format memblock: drop for_each_free_mem_pfn_range_in_zone_from() 2025-09-14 08:49:03 +03:00
.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 8 hotfixes. 4 are cc:stable, 7 are against mm/. 2025-11-26 12:38:05 -08:00
.pylintrc tools: docs: parse-headers.py: move it from sphinx dir 2025-08-29 15:54:42 -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: mark ISDN subsystem as orphan 2025-10-27 17:49:45 -07:00
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 soc: fixes for 6.18, part 4 2025-11-28 09:57:31 -08:00
Makefile rust: kbuild: allow unused_features 2026-03-19 16:08:24 +01:00
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.