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Filename Latest commit message Latest commit date
Luke Nelson 6fa632e719 bpf, x32: Fix bug with ALU64 {LSH, RSH, ARSH} BPF_K shift by 0
The current x32 BPF JIT does not correctly compile shift operations when
the immediate shift amount is 0. The expected behavior is for this to
be a no-op.

The following program demonstrates the bug. The expexceted result is 1,
but the current JITed code returns 2.

  r0 = 1
  r1 = 1
  r1 <<= 0
  if r1 == 1 goto end
  r0 = 2
end:
  exit

This patch simplifies the code and fixes the bug.

Fixes: 03f5781be2 ("bpf, x86_32: add eBPF JIT compiler for ia32")
Co-developed-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luke Nelson <luke.r.nels@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-07-03 11:14:28 +02:00
arch bpf, x32: Fix bug with ALU64 {LSH, RSH, ARSH} BPF_K shift by 0 2019-07-03 11:14:28 +02:00
block block: print offending values when cloned rq limits are exceeded 2019-05-31 15:12:34 -06:00
certs treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-06-06 13:10:49 -07:00
Documentation tcp: add tcp_min_snd_mss sysctl 2019-06-15 18:47:31 -07:00
drivers be2net: Fix number of Rx queues used for flow hashing 2019-06-16 13:47:41 -07:00
fs Changes since last update: 2019-06-06 12:36:54 -07:00
include bpf: fix uapi bpf_prog_info fields alignment 2019-06-29 01:35:46 +02:00
init treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
ipc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 52 2019-05-24 17:36:42 +02:00
kernel bpf: fix BPF_ALU32 | BPF_ARSH on BE arches 2019-06-26 14:48:20 +02:00
lib SPDX fixes for 5.2-rc3, round 2 2019-06-02 10:22:38 -07:00
LICENSES
mm mm, compaction: make sure we isolate a valid PFN 2019-06-01 15:51:32 -07:00
net xsk: Properly terminate assignment in xskq_produce_flush_desc 2019-06-26 14:39:05 +02:00
samples samples/bpf: xdp_redirect, correctly get dummy program id 2019-06-24 15:56:56 +02:00
scripts Merge branch 'akpm' (patches from Andrew) 2019-06-02 08:51:30 -07:00
security Merge branch 'next-fixes-for-5.2-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity 2019-05-31 11:08:44 -07:00
sound treewide: fix typos of SPDX-License-Identifier 2019-06-01 18:29:58 +02:00
tools bpf: fix uapi bpf_prog_info fields alignment 2019-06-29 01:35:46 +02:00
usr
virt Fixes for PPC and s390. 2019-06-02 10:19:39 -07:00
.clang-format
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore .gitignore: exclude .get_maintainer.ignore and .gitattributes 2019-05-18 11:49:54 +09:00
.mailmap A reasonably busy cycle for docs, including: 2019-05-08 12:42:50 -07:00
COPYING
CREDITS MAINTAINERS: Farewell Martin Schwidefsky 2019-05-31 10:14:11 +02:00
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: add reviewer to maintainers entry 2019-06-25 13:58:50 +02:00
Makefile Linux 5.2-rc3 2019-06-02 13:55:33 -07:00
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.