A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-09 05:39:54 -04:00
Code Issues Projects Releases Packages Wiki Activity
No description
889,466 commits 10 branches 0 tags 2.1 GiB
  • C 98.2%
  • Assembly 1%
  • Makefile 0.3%
  • Shell 0.2%
  • Python 0.1%
Find a file
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Andrii Nakryiko 28c1d96562 selftests/bpf: Fix strobemeta selftest regression 
[ Upstream commit 0133c20480b14820d43c37c0e9502da4bffcad3a ]

After most recent nightly Clang update strobemeta selftests started
failing with the following error (relevant portion of assembly included):

  1624: (85) call bpf_probe_read_user_str#114
  1625: (bf) r1 = r0
  1626: (18) r2 = 0xfffffffe
  1628: (5f) r1 &= r2
  1629: (55) if r1 != 0x0 goto pc+7
  1630: (07) r9 += 104
  1631: (6b) *(u16 *)(r9 +0) = r0
  1632: (67) r0 <<= 32
  1633: (77) r0 >>= 32
  1634: (79) r1 = *(u64 *)(r10 -456)
  1635: (0f) r1 += r0
  1636: (7b) *(u64 *)(r10 -456) = r1
  1637: (79) r1 = *(u64 *)(r10 -368)
  1638: (c5) if r1 s< 0x1 goto pc+778
  1639: (bf) r6 = r8
  1640: (0f) r6 += r7
  1641: (b4) w1 = 0
  1642: (6b) *(u16 *)(r6 +108) = r1
  1643: (79) r3 = *(u64 *)(r10 -352)
  1644: (79) r9 = *(u64 *)(r10 -456)
  1645: (bf) r1 = r9
  1646: (b4) w2 = 1
  1647: (85) call bpf_probe_read_user_str#114

  R1 unbounded memory access, make sure to bounds check any such access

In the above code r0 and r1 are implicitly related. Clang knows that,
but verifier isn't able to infer this relationship.

Yonghong Song narrowed down this "regression" in code generation to
a recent Clang optimization change ([0]), which for BPF target generates
code pattern that BPF verifier can't handle and loses track of register
boundaries.

This patch works around the issue by adding an BPF assembly-based helper
that helps to prove to the verifier that upper bound of the register is
a given constant by controlling the exact share of generated BPF
instruction sequence. This fixes the immediate issue for strobemeta
selftest.

  [0] acabad9ff6

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20211029182907.166910-1-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-17 09:48:33 +01:00
arch parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling 2021-11-17 09:48:33 +01:00
block block: remove inaccurate requeue check 2021-11-17 09:48:31 +01:00
certs
crypto
Documentation xen/balloon: add late_initcall_sync() for initial ballooning done 2021-11-17 09:48:25 +01:00
drivers spi: bcm-qspi: Fix missing clk_disable_unprepare() on error in bcm_qspi_probe() 2021-11-17 09:48:33 +01:00
fs btrfs: do not take the uuid_mutex in btrfs_rm_device 2021-11-17 09:48:33 +01:00
include task_stack: Fix end_of_stack() for architectures with upwards-growing stack 2021-11-17 09:48:33 +01:00
init
ipc
kernel PM: hibernate: Get block device exclusively in swsusp_check() 2021-11-17 09:48:32 +01:00
lib lib/xz: Validate the value before assigning it to an enum variable 2021-11-17 09:48:31 +01:00
LICENSES
mm mm, slub: fix potential memoryleak in kmem_cache_open() 2021-10-27 09:54:28 +02:00
net netfilter: conntrack: set on IPS_ASSURED if flows enters internal stream state 2021-11-17 09:48:33 +01:00
samples
scripts leaking_addresses: Always print a trailing newline 2021-11-17 09:48:31 +01:00
security smackfs: use __GFP_NOFAIL for smk_cipso_doi() 2021-11-17 09:48:32 +01:00
sound ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume 2021-11-17 09:48:25 +01:00
tools selftests/bpf: Fix strobemeta selftest regression 2021-11-17 09:48:33 +01:00
usr
virt KVM: do not shrink halt_poll_ns below grow_start 2021-10-09 14:39:50 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.159 2021-11-12 14:43:05 +01:00
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.