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Max Kellermann 249e0a47cd ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error 
The function move_dirty_folio_in_page_array() was created by commit
ce80b76dd3 ("ceph: introduce ceph_process_folio_batch() method") by
moving code from ceph_writepages_start() to this function.

This new function is supposed to return an error code which is checked
by the caller (now ceph_process_folio_batch()), and on error, the
caller invokes redirty_page_for_writepage() and then breaks from the
loop.

However, the refactoring commit has gone wrong, and it by accident, it
always returns 0 (= success) because it first NULLs the pointer and
then returns PTR_ERR(NULL) which is always 0.  This means errors are
silently ignored, leaving NULL entries in the page array, which may
later crash the kernel.

The simple solution is to call PTR_ERR() before clearing the pointer.

Cc: stable@vger.kernel.org
Fixes: ce80b76dd3 ("ceph: introduce ceph_process_folio_batch() method")
Link: https://lore.kernel.org/ceph-devel/aK4v548CId5GIKG1@swift.blarg.de/
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
 		2025-09-09 12:57:03 +02:00
Documentation spi: Fixes for v6.17 2025-09-05 13:29:31 -07:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
arch Several RISC-V fixes for v6.17-rc5: 2025-09-07 08:15:56 -07:00
block block: validate QoS before calling __rq_qos_done_bio() 2025-08-26 10:34:08 -06:00
certs
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crypto crypto: sha512 - Implement export_core() and import_core() 2025-09-02 19:02:39 -07:00
drivers i2c-for-6.17-rc5 2025-09-07 12:30:31 -07:00
fs ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error 2025-09-09 12:57:03 +02:00
include Fix a severe slowdown regression in the timer vDSO code related 2025-09-07 08:29:44 -07:00
init Rust fixes for v6.17 (2nd) 2025-09-06 12:33:09 -07:00
io_uring io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths 2025-08-28 05:48:34 -06:00
ipc vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
kernel Fix a severe slowdown regression in the timer vDSO code related 2025-09-07 08:29:44 -07:00
lib hardening fixes for v6.17-rc4 2025-08-31 08:56:45 -07:00
mm slab fixes for 6.17-rc5 2025-09-04 09:54:20 -07:00
net netfilter pull request nf-25-09-04 2025-09-04 06:59:27 -07:00
rust Rust fixes for v6.17 (2nd) 2025-09-06 12:33:09 -07:00
samples Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
scripts Rust fixes for v6.17 (2nd) 2025-09-06 12:33:09 -07:00
security + Features 2025-08-04 08:17:28 -07:00
sound ALSA: hda/hdmi: Add pin fix for another HP EliteDesk 800 G4 model 2025-09-01 13:51:57 +02:00
tools perf-tools fixes for v6.17-rc5 2025-09-05 15:01:46 -07:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
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
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.editorconfig
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.get_maintainer.ignore
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.gitattributes
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.gitignore gitignore: allow .pylintrc to be tracked 2025-07-02 17:10:04 -06:00
.mailmap MAINTAINERS: Update Nobuhiro Iwamatsu's email address 2025-09-01 10:36:10 +02:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml
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COPYING
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CREDITS MAINTAINERS: retire Boris from TLS maintainers 2025-08-26 17:36:01 -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 drm fixes for 6.17-rc5 2025-09-05 08:50:25 -07:00
Makefile Linux 6.17-rc5 2025-09-07 14:22:57 -07:00
README
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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.