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[87.106.108.193]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8037f3e271sm4306859966b.60.2026.01.01.05.41.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jan 2026 05:41:14 -0800 (PST) From: =?UTF-8?q?G=C3=BCnther=20Noack?= To: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= , Paul Moore Cc: linux-security-module@vger.kernel.org, Tingmao Wang , Justin Suess , Samasth Norway Ananda , Matthieu Buffet , Mikhail Ivanov , konstantin.meskhidze@huawei.com, Demi Marie Obenour , Alyssa Ross , Jann Horn , Tahera Fahimi , =?UTF-8?q?G=C3=BCnther=20Noack?= Subject: [RFC PATCH 3/5] samples/landlock: Add support for LANDLOCK_ACCESS_FS_CONNECT_UNIX Date: Thu, 1 Jan 2026 14:41:00 +0100 Message-ID: <20260101134102.25938-4-gnoack3000@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260101134102.25938-1-gnoack3000@gmail.com> References: <20260101134102.25938-1-gnoack3000@gmail.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add unix(7) connect() support to the Landlock sample tool. The "connect UNIX" right is grouped with the read-write rights in the sample tool. Rationale: In the general case, any operations are possible through a Unix domain socket, including data-mutating operations. Cc: Justin Suess Cc: Mickaël Salaün Signed-off-by: Günther Noack --- samples/landlock/sandboxer.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index e7af02f98208b..b24ef317d1ea9 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c @@ -295,11 +295,12 @@ static bool check_ruleset_scope(const char *const env_var, LANDLOCK_ACCESS_FS_MAKE_SYM | \ LANDLOCK_ACCESS_FS_REFER | \ LANDLOCK_ACCESS_FS_TRUNCATE | \ - LANDLOCK_ACCESS_FS_IOCTL_DEV) + LANDLOCK_ACCESS_FS_IOCTL_DEV | \ + LANDLOCK_ACCESS_FS_CONNECT_UNIX) /* clang-format on */ -#define LANDLOCK_ABI_LAST 7 +#define LANDLOCK_ABI_LAST 8 #define XSTR(s) #s #define STR(s) XSTR(s) @@ -444,6 +445,12 @@ int main(const int argc, char *const argv[], char *const *const envp) "provided by ABI version %d (instead of %d).\n", LANDLOCK_ABI_LAST, abi); __attribute__((fallthrough)); + case 7: + /* Removes LANDLOCK_ACCESS_FS_CONNECT_UNIX for ABI < 8 */ + ruleset_attr.handled_access_fs &= + ~LANDLOCK_ACCESS_FS_CONNECT_UNIX; + + __attribute__((fallthrough)); case LANDLOCK_ABI_LAST: break; default: -- 2.52.0