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Eric Dumazet 5f1eb1ff58 scm: add user copy checks to put_cmsg() 
This is a followup of commit 2558b8039d ("net: use a bounce
buffer for copying skb->mark")

x86 and powerpc define user_access_begin, meaning
that they are not able to perform user copy checks
when using user_write_access_begin() / unsafe_copy_to_user()
and friends [1]

Instead of waiting bugs to trigger on other arches,
add a check_object_size() in put_cmsg() to make sure
that new code tested on x86 with CONFIG_HARDENED_USERCOPY=y
will perform more security checks.

[1] We can not generically call check_object_size() from
unsafe_copy_to_user() because UACCESS is enabled at this point.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2023-02-20 11:39:59 +00:00
Documentation Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
arch Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
block block-6.2-2023-02-03 2023-02-03 11:35:42 -08:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-01-31 17:53:01 +09:00
crypto wifi: cfg80211: Deduplicate certificate loading 2023-01-19 14:46:45 +01:00
drivers linux-can-next-for-6.3-20230217 2023-02-20 11:31:22 +00:00
fs Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
include net: make default_rps_mask a per netns attribute 2023-02-20 11:22:54 +00:00
init bpf-next-for-netdev 2023-01-28 00:00:14 -08:00
io_uring io_uring: always prep_async for drain requests 2023-01-27 06:29:29 -07:00
ipc Non-MM patches for 6.2-rc1. 2022-12-12 17:28:58 -08:00
kernel Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
lib Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
mm 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
net scm: add user copy checks to put_cmsg() 2023-02-20 11:39:59 +00:00
rust rust: print: avoid evaluating arguments in `pr_*` macros in `unsafe` blocks 2023-01-16 00:54:35 +01:00
samples bpf-next-for-netdev 2023-02-10 17:51:27 -08:00
scripts Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
security apparmor: Fix regression in compat permissions for getattr 2023-02-15 11:24:38 -08:00
sound sound fixes for 6.2-rc8 2023-02-10 08:37:48 -08:00
tools self-tests: more rps self tests 2023-02-20 11:22:54 +00:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt VFIO fixes for v6.2-rc6 2023-01-23 11:56:07 -08:00
.clang-format iommufd for 6.2 2022-12-14 09:15:43 -08:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore *.rpm 2022-12-30 17:22:14 +09:00
.mailmap 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SCTP maintainers 2023-02-02 11:35:33 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net 2023-02-17 11:06:39 +00:00
Makefile Linux 6.2-rc8 2023-02-12 14:10:17 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.