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Filename Latest commit message Latest commit date
Paul E. McKenney 6a4fea54ab rcu: Use READ_ONCE() for ->expmask in rcu_read_unlock_special()
commit c51f83c315c392d9776c33eb16a2fe1349d65c7f upstream.

The rcu_node structure's ->expmask field is updated only when holding the
->lock, but is also accessed locklessly.  This means that all ->expmask
updates must use WRITE_ONCE() and all reads carried out without holding
->lock must use READ_ONCE().  This commit therefore changes the lockless
->expmask read in rcu_read_unlock_special() to use READ_ONCE().

Reported-by: syzbot+99f4ddade3c22ab0cf23@syzkaller.appspotmail.com
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11 04:35:08 -08:00
arch sparc32: fix struct ipc64_perm type definition 2020-02-11 04:35:03 -08:00
block block: fix memleak of bio integrity data 2020-01-26 10:01:09 +01:00
certs
crypto crypto: pcrypt - Fix user-after-free on module unload 2020-02-01 09:34:52 +00:00
Documentation PM / devfreq: Add new name attribute for sysfs 2020-02-05 21:22:40 +00:00
drivers mfd: dln2: More sanity checking for endpoints 2020-02-11 04:35:07 -08:00
fs btrfs: do not zero f_bavail if we have available space 2020-02-05 21:22:52 +00:00
include cfg80211: Fix radar event during another phy CAC 2020-02-05 21:22:46 +00:00
init Revert "um: Enable CONFIG_CONSTRUCTORS" 2020-02-01 09:34:53 +00:00
ipc ipc/msg.c: consolidate all xxxctl_down() functions 2020-02-11 04:35:07 -08:00
kernel rcu: Use READ_ONCE() for ->expmask in rcu_read_unlock_special() 2020-02-11 04:35:08 -08:00
lib XArray: Fix xas_pause at ULONG_MAX 2020-02-05 21:22:47 +00:00
LICENSES
mm mm/migrate.c: also overwrite error when it is bigger than zero 2020-02-05 21:22:53 +00:00
net netfilter: ipset: fix suspicious RCU usage in find_set_and_id 2020-02-11 04:35:07 -08:00
samples samples/bpf: Fix broken xdp_rxq_info due to map order assumptions 2020-01-26 10:00:58 +01:00
scripts ARM: 8950/1: ftrace/recordmcount: filter relocation types 2020-01-29 16:45:27 +01:00
security tomoyo: Use atomic_t for statistics counter 2020-02-05 21:22:41 +00:00
sound ASoC: topology: fix soc_tplg_fe_link_create() - link->dobj initialization order 2020-02-05 21:22:53 +00:00
tools perf report: Fix no libunwind compiled warning break s390 issue 2020-02-05 21:22:53 +00:00
usr
virt
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.cocciconfig
.get_maintainer.ignore
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COPYING
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Kbuild
Kconfig
MAINTAINERS MAINTAINERS: correct entries for ISDN/mISDN section 2020-02-11 04:35:06 -08:00
Makefile Linux 5.4.18 2020-02-05 21:22:53 +00:00
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.