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Filename Latest commit message Latest commit date
Jiong Wang 75672dda27 bpf: fix BPF_ALU32 | BPF_ARSH on BE arches 
Yauheni reported the following code do not work correctly on BE arches:

       ALU_ARSH_X:
               DST = (u64) (u32) ((*(s32 *) &DST) >> SRC);
               CONT;
       ALU_ARSH_K:
               DST = (u64) (u32) ((*(s32 *) &DST) >> IMM);
               CONT;

and are causing failure of test_verifier test 'arsh32 on imm 2' on BE
arches.

The code is taking address and interpreting memory directly, so is not
endianness neutral. We should instead perform standard C type casting on
the variable. A u64 to s32 conversion will drop the high 32-bit and reserve
the low 32-bit as signed integer, this is all we want.

Fixes: 2dc6b100f9 ("bpf: interpreter support BPF_ALU | BPF_ARSH")
Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-26 14:48:20 +02:00
arch
block
certs
crypto
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
include tcp: add tcp_min_snd_mss sysctl 2019-06-15 18:47:31 -07:00
init
ipc
kernel bpf: fix BPF_ALU32 | BPF_ARSH on BE arches 2019-06-26 14:48:20 +02:00
lib
LICENSES
mm
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
security
sound
tools tools: bpftool: use correct argument in cgroup errors 2019-06-26 14:45:29 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: add reviewer to maintainers entry 2019-06-25 13:58:50 +02:00
Makefile
README

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.