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Yonghong Song 09584b4067 bpf: fix selftests/bpf test_kmod.sh failure when CONFIG_BPF_JIT_ALWAYS_ON=y With CONFIG_BPF_JIT_ALWAYS_ON is defined in the config file, tools/testing/selftests/bpf/test_kmod.sh failed like below: [root@localhost bpf]# ./test_kmod.sh sysctl: setting key "net.core.bpf_jit_enable": Invalid argument [ JIT enabled:0 hardened:0 ] [ 132.175681] test_bpf: #297 BPF_MAXINSNS: Jump, gap, jump, ... FAIL to prog_create err=-524 len=4096 [ 132.458834] test_bpf: Summary: 348 PASSED, 1 FAILED, [340/340 JIT'ed] [ JIT enabled:1 hardened:0 ] [ 133.456025] test_bpf: #297 BPF_MAXINSNS: Jump, gap, jump, ... FAIL to prog_create err=-524 len=4096 [ 133.730935] test_bpf: Summary: 348 PASSED, 1 FAILED, [340/340 JIT'ed] [ JIT enabled:1 hardened:1 ] [ 134.769730] test_bpf: #297 BPF_MAXINSNS: Jump, gap, jump, ... FAIL to prog_create err=-524 len=4096 [ 135.050864] test_bpf: Summary: 348 PASSED, 1 FAILED, [340/340 JIT'ed] [ JIT enabled:1 hardened:2 ] [ 136.442882] test_bpf: #297 BPF_MAXINSNS: Jump, gap, jump, ... FAIL to prog_create err=-524 len=4096 [ 136.821810] test_bpf: Summary: 348 PASSED, 1 FAILED, [340/340 JIT'ed] [root@localhost bpf]# The test_kmod.sh load/remove test_bpf.ko multiple times with different settings for sysctl net.core.bpf_jit_{enable,harden}. The failed test #297 of test_bpf.ko is designed such that JIT always fails. Commit `290af86629` (bpf: introduce BPF_JIT_ALWAYS_ON config) introduced the following tightening logic: ... if (!bpf_prog_is_dev_bound(fp->aux)) { fp = bpf_int_jit_compile(fp); #ifdef CONFIG_BPF_JIT_ALWAYS_ON if (!fp->jited) { *err = -ENOTSUPP; return fp; } #endif ... With this logic, Test #297 always gets return value -ENOTSUPP when CONFIG_BPF_JIT_ALWAYS_ON is defined, causing the test failure. This patch fixed the failure by marking Test #297 as expected failure when CONFIG_BPF_JIT_ALWAYS_ON is defined. Fixes: `290af86629` (bpf: introduce BPF_JIT_ALWAYS_ON config) Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2018-02-05 00:31:57 +01:00
arch	Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-02-04 11:45:55 -08:00
block	for-linus-20180204	2018-02-04 11:16:35 -08:00
certs	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2018-01-31 14:22:45 -08:00
Documentation	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
drivers	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	Refactor support for encrypted symlinks to move common code to fscrypt.	2018-02-04 10:43:12 -08:00
include	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
init	init_task out-of-lining	2018-01-29 09:08:34 -08:00
ipc	Merge branch 'work.mqueue' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-01-30 18:32:21 -08:00
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
lib	bpf: fix selftests/bpf test_kmod.sh failure when CONFIG_BPF_JIT_ALWAYS_ON=y	2018-02-05 00:31:57 +01:00
LICENSES	LICENSES: Add MPL-1.1 license	2018-01-06 10:59:44 -07:00
mm	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
samples	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
scripts	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
security	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
sound	Driver Core updates for 4.16-rc1	2018-02-01 10:00:28 -08:00
tools	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf	2018-02-04 16:46:58 -05:00
usr	initramfs: fix initramfs rebuilds w/ compression after disabling	2017-11-03 07:39:19 -07:00
virt	Currently, hardened usercopy performs dynamic bounds checking on slab	2018-02-03 16:25:42 -08:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	scripts/package: snap-pkg target	2017-12-13 00:00:18 +09:00
.mailmap	mailmap: update Mark Yao's email address	2018-01-04 16:45:09 -08:00
COPYING
CREDITS	MAINTAINERS: update TPM driver infrastructure changes	2017-11-09 17:58:40 -08:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
MAINTAINERS	Bug fixes galore, removal of the ntb atom driver, and updates to the ntb	2018-02-04 11:13:49 -08:00
Makefile	Kconfig updates for v4.16	2018-02-01 11:45:49 -08:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.