linux-kernel - [PATCH net] netlink: specs: mptcp: fix port endianness

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240911091003.1112179-1-ast@fiberby.net>
Date: Wed, 11 Sep 2024 09:10:02 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: Matthieu Baerts <matttbe@...nel.org>,
	Mat Martineau <martineau@...nel.org>
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Geliang Tang <geliang@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Donald Hunter <donald.hunter@...il.com>,
	Davide Caratti <dcaratti@...hat.com>,
	netdev@...r.kernel.org,
	mptcp@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH net] netlink: specs: mptcp: fix port endianness

The MPTCP port attribute is in host endianness, but was documented
as big-endian in the ynl specification.

Below are two examples from net/mptcp/pm_netlink.c showing that the
attribute is converted to/from host endianness for use with netlink.

Import from netlink:
  addr->port = htons(nla_get_u16(tb[MPTCP_PM_ADDR_ATTR_PORT]))

Export to netlink:
  nla_put_u16(skb, MPTCP_PM_ADDR_ATTR_PORT, ntohs(addr->port))

Where addr->port is defined as __be16.

No functional change intended.

Fixes: bc8aeb2045e2 ("Documentation: netlink: add a YAML spec for mptcp")
Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
---
 Documentation/netlink/specs/mptcp_pm.yaml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Documentation/netlink/specs/mptcp_pm.yaml b/Documentation/netlink/specs/mptcp_pm.yaml
index af525ed29792..30d8342cacc8 100644
--- a/Documentation/netlink/specs/mptcp_pm.yaml
+++ b/Documentation/netlink/specs/mptcp_pm.yaml
@@ -109,7 +109,6 @@ attribute-sets:
       -
         name: port
         type: u16
-        byte-order: big-endian
       -
         name: flags
         type: u32
-- 
2.45.2