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Piotr Krysiuk b5871dca25 bpf: Simplify alu_limit masking for pointer arithmetic
Instead of having the mov32 with aux->alu_limit - 1 immediate, move this
operation to retrieve_ptr_limit() instead to simplify the logic and to
allow for subsequent sanity boundary checks inside retrieve_ptr_limit().
This avoids in future that at the time of the verifier masking rewrite
we'd run into an underflow which would not sign extend due to the nature
of mov32 instruction.

Signed-off-by: Piotr Krysiuk <piotras@gmail.com>
Co-developed-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
2021-03-17 19:13:22 +01:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-03-10 15:14:56 -08:00
block
certs
crypto crypto: mips/poly1305 - enable for all MIPS processors 2021-03-08 11:52:17 +01:00
Documentation devlink: fix typo in documentation 2021-03-13 18:11:24 -08:00
drivers net: arcnet: com20020 fix error handling 2021-03-14 14:17:48 -07:00
fs pstore fixes for v5.12-rc2 2021-03-05 17:21:25 -08:00
include net: correct sk_acceptq_is_full() 2021-03-12 12:27:14 -08:00
init
ipc
kernel bpf: Simplify alu_limit masking for pointer arithmetic 2021-03-17 19:13:22 +01:00
lib Merge git://git.kernel.org:/pub/scm/linux/kernel/git/davem/sparc 2021-03-08 22:01:58 -08:00
LICENSES
mm
net flow_dissector: fix byteorder of dissected ICMP ID 2021-03-14 14:30:20 -07:00
samples Merge git://git.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2021-03-09 17:15:56 -08:00
scripts gcc-plugins fixes for v5.12-rc2 2021-03-05 17:23:03 -08:00
security
sound
tools selftests/bpf: Set gopt opt_class to 0 if get tunnel opt failed 2021-03-15 17:28:58 +01:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS ibmvnic: update MAINTAINERS 2021-03-12 17:53:11 -08:00
Makefile Linux 5.12-rc2 2021-03-05 17:33:41 -08:00
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.