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A mirror of the official Linux kernel repository just in case

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Stefano Brivio 439cd39ea1 netfilter: ipset: list:set: Decrease refcount synchronously on deletion and replace Commit `45040978c8` ("netfilter: ipset: Fix set:list type crash when flush/dump set in parallel") postponed decreasing set reference counters to the RCU callback. An 'ipset del' command can terminate before the RCU grace period is elapsed, and if sets are listed before then, the reference counter shown in userspace will be wrong: # ipset create h hash:ip; ipset create l list:set; ipset add l # ipset del l h; ipset list h Name: h Type: hash:ip Revision: 4 Header: family inet hashsize 1024 maxelem 65536 Size in memory: 88 References: 1 Number of entries: 0 Members: # sleep 1; ipset list h Name: h Type: hash:ip Revision: 4 Header: family inet hashsize 1024 maxelem 65536 Size in memory: 88 References: 0 Number of entries: 0 Members: Fix this by making the reference count update synchronous again. As a result, when sets are listed, ip_set_name_byindex() might now fetch a set whose reference count is already zero. Instead of relying on the reference count to protect against concurrent set renaming, grab ip_set_ref_lock as reader and copy the name, while holding the same lock in ip_set_rename() as writer instead. Reported-by: Li Shuang <shuali@redhat.com> Fixes: `45040978c8` ("netfilter: ipset: Fix set:list type crash when flush/dump set in parallel") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2018-11-01 00:29:36 +01:00
arch	Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-10-24 14:43:41 +01:00
block	for-4.20/block-20181021	2018-10-22 17:46:08 +01:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	Revert "net: simplify sock_poll_wait"	2018-10-23 10:57:06 -07:00
Documentation	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
drivers	Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue	2018-10-24 16:27:33 -07:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	Further restructure ext4 documentation; fix up ext4's delayed	2018-10-24 17:42:24 +01:00
include	netfilter: ipset: list:set: Decrease refcount synchronously on deletion and replace	2018-11-01 00:29:36 +01:00
init	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-10-23 15:00:03 +01:00
ipc	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
kernel	Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-10-24 11:49:35 +01:00
lib	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
LICENSES	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
mm	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
net	netfilter: ipset: list:set: Decrease refcount synchronously on deletion and replace	2018-11-01 00:29:36 +01:00
samples	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-10-12 21:38:46 -07:00
scripts	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
security	Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-10-24 11:49:35 +01:00
sound	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-10-23 13:32:18 +01:00
tools	net/ipv6: Allow onlink routes to have a device mismatch if it is the default route	2018-10-24 14:36:38 -07:00
usr	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
virt	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
Makefile	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-10-23 13:08:53 +01:00
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.