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Kuniyuki Iwashima 32d7f8da82 sysctl: Fix data races in proc_dointvec_minmax(). 
[ Upstream commit f613d86d01 ]

A sysctl variable is accessed concurrently, and there is always a chance
of data-race.  So, all readers and writers need some basic protection to
avoid load/store-tearing.

This patch changes proc_dointvec_minmax() to use READ_ONCE() and
WRITE_ONCE() internally to fix data-races on the sysctl side.  For now,
proc_dointvec_minmax() itself is tolerant to a data-race, but we still
need to add annotations on the other subsystem's side.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-07-21 21:24:20 +02:00
arch ARM: 9210/1: Mark the FDT_FIXED sections as shareable 2022-07-21 21:24:16 +02:00
block block: fix rq-qos breakage from skipping rq_qos_done_bio() 2022-07-12 16:34:57 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: memneq - move into lib/ 2022-06-22 14:22:03 +02:00
Documentation dt-bindings: dma: allwinner,sun50i-a64-dma: Fix min/max typo 2022-07-12 16:35:17 +02:00
drivers net: ethernet: ti: am65-cpsw: Fix devlink port register sequence 2022-07-21 21:24:19 +02:00
fs xfs: drop async cache flushes from CIL commits. 2022-07-21 21:24:15 +02:00
include reset: Fix devm bulk optional exclusive control getter 2022-07-21 21:24:15 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:23:26 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:23:10 +02:00
kernel sysctl: Fix data races in proc_dointvec_minmax(). 2022-07-21 21:24:20 +02:00
lib ida: don't use BUG_ON() for debugging 2022-07-12 16:35:18 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm: split huge PUD on wp_huge_pud fallback 2022-07-21 21:24:11 +02:00
net wifi: mac80211: fix queue selection for mesh/OCB interfaces 2022-07-21 21:24:13 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:23:23 +02:00
scripts stddef: Introduce DECLARE_FLEX_ARRAY() helper 2022-07-12 16:35:03 +02:00
security ima: Fix a potential integer overflow in ima_appraise_measurement 2022-07-21 21:24:18 +02:00
sound ASoC: Intel: Skylake: Correct the handling of fmt_config flexible array 2022-07-21 21:24:19 +02:00
tools selftests/net: fix section name when using xdp_dummy.o 2022-07-12 16:35:19 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Initialize debugfs_dentry when a VM is created to avoid NULL deref 2022-07-12 16:35:05 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Input: goodix - add a goodix.h header file 2022-07-12 16:34:51 +02:00
Makefile Linux 5.15.55 2022-07-15 10:13:00 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.