[PATCH v2 3/8] landlock: Add erratum for TCP fix

["Mickaël Salaün" <mic@digikod.net>]

Add erratum for the TCP socket identification fixed with commit
854277e2cc8c ("landlock: Fix non-TCP sockets restriction").

Fixes: 854277e2cc8c ("landlock: Fix non-TCP sockets restriction")
Cc: Günther Noack <gnoack@google.com>
Cc: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20250318161443.279194-4-mic@digikod.net
---

Changes since v1:
- New patch.
---
 security/landlock/errata/abi-4.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 security/landlock/errata/abi-4.h

diff --git a/security/landlock/errata/abi-4.h b/security/landlock/errata/abi-4.h
new file mode 100644
index 000000000000..c052ee54f89f
--- /dev/null
+++ b/security/landlock/errata/abi-4.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/**
+ * DOC: erratum_1
+ *
+ * Erratum 1: TCP socket identification
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This fix addresses an issue where IPv4 and IPv6 stream sockets (e.g., SMC,
+ * MPTCP, or SCTP) were incorrectly restricted by TCP access rights during
+ * :manpage:`bind(2)` and :manpage:`connect(2)` operations. This change ensures
+ * that only TCP sockets are subject to TCP access rights, allowing other
+ * protocols to operate without unnecessary restrictions.
+ */
+LANDLOCK_ERRATUM(1)
-- 
2.48.1