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Greg Kroah-Hartman ca9d081b49 zram: fix up permission for the hot_add sysfs file 
Commit 75a2d4226b ("driver core: class: mark the struct class for
sysfs callbacks as constant") changed the attribute to use
CLASS_ATTR_RO() which changed the permission from 0400 to 0444.  But
this atribute is "special" in that reading it modifies the system state,
so it MUST be set to 0400 so that only root processes can muck around
with it.

Fix this all up, AND document this so that I don't change it again in
3-4 years when I stumble across it and wonder why it's an open-coded
_ATTR() macro.

Reported-by: Denis Efremov <efremov@linux.com>
Fixes: 75a2d4226b ("driver core: class: mark the struct class for sysfs callbacks as constant")
Link: https://lore.kernel.org/r/2023041810-angelic-conical-52d8@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-18 16:06:22 +02:00
arch MIPS: vpe-cmp: remove module owner pointer from struct class usage. 2023-04-03 19:57:26 +02:00
block Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
certs Kbuild updates for v6.3 2023-02-26 11:53:25 -08:00
crypto asymmetric_keys: log on fatal failures in PE/pkcs7 2023-03-21 16:23:56 +00:00
Documentation Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
drivers zram: fix up permission for the hot_add sysfs file 2023-04-18 16:06:22 +02:00
fs Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
include tty: make tty_class a static const structure 2023-04-03 21:43:07 +02:00
init Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
io_uring io_uring-6.3-2023-03-30 2023-03-31 12:30:13 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel driver core: class: remove struct class_interface * from callbacks 2023-04-03 21:42:52 +02:00
lib Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
net Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
rust Rust fixes for 6.3-rc1 2023-03-03 14:51:15 -08:00
samples driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
scripts Kbuild fixes for v6.3 (2nd) 2023-04-01 09:25:17 -07:00
security keys: Do not cache key in task struct if key is requested from kernel thread 2023-03-21 16:22:40 +00:00
sound Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
tools Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM/riscv changes for 6.3 2023-02-15 12:33:28 -05:00
.clang-format cpumask: re-introduce constant-sized cpumask optimizations 2023-03-05 14:30:34 -08:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for *.dtso files 2023-02-26 15:28:23 +09:00
.gitignore kbuild: rpm-pkg: move source components to rpmbuild/SOURCES 2023-03-16 22:45:56 +09:00
.mailmap mailmap: add entries for Richard Leitner 2023-03-23 17:18:35 -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 There is no particular theme here - mainly quick hits all over the tree. 2023-02-23 17:55:40 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge 6.3-rc5 into driver-core-next 2023-04-03 09:33:30 +02:00
Makefile Linux 6.3-rc5 2023-04-02 14:29:29 -07:00
README

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 Restructured Text 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.