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Odin Ugedal eec8fd0277 device_cgroup: Cleanup cgroup eBPF device filter code 
Original cgroup v2 eBPF code for filtering device access made it
possible to compile with CONFIG_CGROUP_DEVICE=n and still use the eBPF
filtering. Change
commit 4b7d4d453f ("device_cgroup: Export devcgroup_check_permission")
reverted this, making it required to set it to y.

Since the device filtering (and all the docs) for cgroup v2 is no longer
a "device controller" like it was in v1, someone might compile their
kernel with CONFIG_CGROUP_DEVICE=n. Then (for linux 5.5+) the eBPF
filter will not be invoked, and all processes will be allowed access
to all devices, no matter what the eBPF filter says.

Signed-off-by: Odin Ugedal <odin@ugedal.com>
Acked-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 		2020-04-13 14:41:54 -04:00
Documentation 9p pull request for inclusion in 5.7 (take 2) 2020-04-08 21:51:14 -07:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
arch arm64 fixes: 2020-04-09 11:04:16 -07:00
block SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
certs .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-04-01 14:47:40 -07:00
drivers device_cgroup: Cleanup cgroup eBPF device filter code 2020-04-13 14:41:54 -04:00
fs xattr: fix uninitialized out-param 2020-04-09 15:33:09 -04:00
include device_cgroup: Cleanup cgroup eBPF device filter code 2020-04-13 14:41:54 -04:00
init arm64 fixes: 2020-04-09 11:04:16 -07:00
ipc ipc/shm.c: make compat_ksys_shmctl() static 2020-04-07 10:43:45 -07:00
kernel Revert "cgroup: Add memory barriers to plug cgroup_rstat_updated() race window" 2020-04-09 14:55:46 -04:00
lib libnvdimm for 5.7 2020-04-08 21:03:40 -07:00
mm libnvdimm for 5.7 2020-04-08 21:03:40 -07:00
net The main items are: 2020-04-08 21:44:05 -07:00
samples samples/hw_breakpoint: drop use of kallsyms_lookup_name() 2020-04-07 10:43:44 -07:00
scripts ubsan: split "bounds" checker from other options 2020-04-07 10:43:44 -07:00
security device_cgroup: Cleanup cgroup eBPF device filter code 2020-04-13 14:41:54 -04:00
sound SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
tools powerpc updates for 5.7 #2 2020-04-09 11:01:42 -07:00
usr .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
virt KVM: Pass kvm_init()'s opaque param to additional arch funcs 2020-03-31 10:48:03 -04:00
.clang-format clang-format: Update with the latest for_each macro list 2020-03-06 21:50:05 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
.mailmap media updates for v5.7-rc1 2020-03-30 13:42:05 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Hand MIPS over to Thomas 2020-02-24 22:43:18 -08:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS libnvdimm for 5.7 2020-04-08 21:03:40 -07:00
Makefile Kbuild updates for v5.7 2020-03-31 16:03:39 -07:00
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.