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Kuniyuki Iwashima 0a8e987dcc tcp: Fix SYN option room calculation for TCP-AO. 
When building SYN packet in tcp_syn_options(), MSS, TS, WS, and
SACKPERM are used without checking the remaining bytes in the
options area.

To keep that logic as is, we limit the TCP-AO MAC length in
tcp_ao_parse_crypto().  Currently, the limit is calculated as below.

  MAX_TCP_OPTION_SPACE - TCPOLEN_TSTAMP_ALIGNED
                       - TCPOLEN_WSCALE_ALIGNED
                       - TCPOLEN_SACKPERM_ALIGNED

This looks confusing as (1) we pack SACKPERM into the leading
2-bytes of the aligned 12-bytes of TS and (2) TCPOLEN_MSS_ALIGNED
is not used.  Fortunately, the calculated limit is not wrong as
TCPOLEN_SACKPERM_ALIGNED and TCPOLEN_MSS_ALIGNED are the same value.

However, we should use the proper constant in the formula.

  MAX_TCP_OPTION_SPACE - TCPOLEN_MSS_ALIGNED
                       - TCPOLEN_TSTAMP_ALIGNED
                       - TCPOLEN_WSCALE_ALIGNED

Fixes: 4954f17dde ("net/tcp: Introduce TCP_AO setsockopt()s")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-11-06 08:59:54 +00:00
arch asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
block for-6.7/block-2023-10-30 2023-11-01 12:30:07 -10:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto KEYS: asymmetric: Fix sign/verify on pkcs1pad without a hash 2023-10-18 12:27:10 +08:00
Documentation net/smc: fix documentation of buffer sizes 2023-11-02 12:50:17 +01:00
drivers octeontx2-pf: Free pending and dropped SQEs 2023-11-06 08:57:15 +00:00
fs Bootconfig for v6.7: 2023-11-01 16:07:05 -10:00
include net/tcp: fix possible out-of-bounds reads in tcp_hash_fail() 2023-11-03 11:38:14 +00:00
init asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
io_uring io_uring-futex-2023-10-30 2023-11-01 11:25:08 -10:00
ipc ipc: convert to new timestamp accessors 2023-10-18 14:08:30 +02:00
kernel Probes updates for v6.7: 2023-11-01 16:15:42 -10:00
lib Probes updates for v6.7: 2023-11-01 16:15:42 -10:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
net tcp: Fix SYN option room calculation for TCP-AO. 2023-11-06 08:59:54 +00:00
rust workqueue: Add rust bindings for v6.7 2023-10-30 20:35:48 -10:00
samples Probes updates for v6.7: 2023-11-01 16:15:42 -10:00
scripts asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
security for-6.7/block-2023-10-30 2023-11-01 12:30:07 -10:00
sound vfs-6.7.iov_iter 2023-10-30 09:24:21 -10:00
tools selftests: pmtu.sh: fix result checking 2023-11-03 09:15:42 +00:00
usr arch: Remove Itanium (IA-64) architecture 2023-09-11 08:13:17 +00:00
virt ARM: 2023-09-07 13:52:20 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.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: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap 20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues 2023-10-24 09:52:16 -10:00
.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 USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
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 Probes updates for v6.7: 2023-11-01 16:15:42 -10:00
Makefile asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
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.