GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-19 05:04:20 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions
No description
840638 commits 24 branches 25 tags 2.7 GiB
Find a file
Alexei Starovoitov eea1c227b9 bpf: fix callees pruning callers 
The commit 7640ead939 partially resolved the issue of callees
incorrectly pruning the callers.
With introduction of bounded loops and jmps_processed heuristic
single verifier state may contain multiple branches and calls.
It's possible that new verifier state (for future pruning) will be
allocated inside callee. Then callee will exit (still within the same
verifier state). It will go back to the caller and there R6-R9 registers
will be read and will trigger mark_reg_read. But the reg->live for all frames
but the top frame is not set to LIVE_NONE. Hence mark_reg_read will fail
to propagate liveness into parent and future walking will incorrectly
conclude that the states are equivalent because LIVE_READ is not set.
In other words the rule for parent/live should be:
whenever register parentage chain is set the reg->live should be set to LIVE_NONE.
is_state_visited logic already follows this rule for spilled registers.

Fixes: 7640ead939 ("bpf: verifier: make sure callees don't prune with caller differences")
Fixes: f4d7e40a5b ("bpf: introduce function calls (verification)")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-06-19 02:22:51 +02:00
arch bpf: net: Add SO_DETACH_REUSEPORT_BPF 2019-06-15 01:21:19 +02:00
block
certs
crypto
Documentation
drivers
fs
include bpf: introduce bounded loops 2019-06-19 02:22:51 +02:00
init
ipc
kernel bpf: fix callees pruning callers 2019-06-19 02:22:51 +02:00
lib
LICENSES
mm
net bpf: export bpf_sock for BPF_PROG_TYPE_SOCK_OPS prog type 2019-06-15 01:21:57 +02:00
samples samples: bpf: refactor header include path 2019-06-18 00:28:36 +02:00
scripts
security
sound
tools selftests/bpf: fix tests due to const spill/fill 2019-06-19 02:22:51 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
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.