From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f52.google.com (mail-ej1-f52.google.com [209.85.218.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E56C72F4A14 for ; Mon, 19 Jan 2026 20:35:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768854934; cv=none; b=VGHSK9g+WUOtJbd0q5nOBj6wzhWIzX4KGi9I8zUb5R6jnV/t099e0mzhcwUAcG/JI/p6V/8QvDQBk15RMfqjWH4Jc3daadA4nskNCdOzjc1u7bUcGaHKJqgdbaE+YU34RDxy6B/wFtE7Z0dZFdY634gD7r/QMOSrVi7ZPulU9L4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768854934; c=relaxed/simple; bh=/0GsNLutMbOq5XqKTN2ShLINQLlbmlqI+PoxuMdzNo4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nm38r7CzglVn+lDi+EiDxYd4QtkaXmmALHt1gHIaCddJIghBDBvCsSNawugOxA6YdyeHyJH3z9SK1Imu8hcY9r+ploOalj2vGLfBuwnGNF790hbHiCYCFckGafJbIiikh3CidZSgxO97ONMF+yn0fEst0p7qk/xpFx1pNSlUYfY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=IhIT1FeH; arc=none smtp.client-ip=209.85.218.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IhIT1FeH" Received: by mail-ej1-f52.google.com with SMTP id a640c23a62f3a-b870732cce2so718009466b.3 for ; Mon, 19 Jan 2026 12:35:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768854931; x=1769459731; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=1PBGuMUgOlG9tW15ANz73eelpLo/6n8nR8ahYAgYRA8=; b=IhIT1FeHe/nREbEqnHXrvdRPCfTohG31iKZkgWCEWZVPt/enWLe759IdwFAutGD9TL O5IlLL0y6BEZKNDtaU+o3mN2LnPYaFxVTcJKovWP3g9hCttfqdQbMa3qT0WakE0U9/AH +CaY1k7IhyyVkYSqAIUjqMINdeBwUuGBJ7bqUruGaPcfDoK1fbB6eI1i1fLH3OzaKebf hGvQ4sPHGrzMwslmO9PPRinUn/JRNpgtN59IG2eSbUFSuFlyYzpjYmr2bzwMWMPuDeLj Yc9t4a9Ua1VULk5QyI/zK930u6awLDiHX0j5Ln3CenoCx66M3LXSS41ob1MbnGJ/eHa8 AwQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768854931; x=1769459731; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=1PBGuMUgOlG9tW15ANz73eelpLo/6n8nR8ahYAgYRA8=; b=gmcRuXTZzP3eoZPDOniyJY30ipIvyE4poxiT+5mgklfTdjlOInev1XH0CcBP80dJTJ jBiAMZatcNZSxtn2mzl8v+uc6K5hgmGodXWvLYQfkU+7GrJ5hFL2ANA13AlQM+pvqQFI zCd3TorfAvtcLAshW8nhwzZfnSbVCxteFFMYQQ1GrbAfPKjzsyH+Z2gHEvH6aTgsIh3W l6XIJI52he4zNAi8/Gek1ZSum8lSsLfk+u6KOC4ZtIrNevuI+ZwRzcdlAJk5oNpveJD1 uaiJ7pXgPXpdnfRtG3+3VmILaak75XW4A6NyhFW76Q0KhJDaWbQ1UcwCxkUW00Yv7vmg 8/zg== X-Forwarded-Encrypted: i=1; AJvYcCUbfCilYuSPNZhVRzH9R091ixjeXYhIsfcwrBiwG/NRZVoaWrzxnNBkuWYF+pBjnnKHv1mT7Yq8S+kCqq00jvD5hX7qP3Y=@vger.kernel.org X-Gm-Message-State: AOJu0YyASNYJ68mQUNg90I4j+HMAwFx6wLcfYzBaRxZlua4xdCUL3vgt 0S+YOot9RU56pP/mW0jw6LGV9EdsmTG4hUp4sOhx3HWx+gJj1EWLlUFr X-Gm-Gg: AY/fxX7fixAF/Qewppiv3QZ+h60d1MDoD9pl6+0/HY2tRqUOQpc7NyAhJrff3TwV3te jrgAOZpENgur6zgecvcvelAGtCWIOoBdRyjhyEF/nFHAGDjjLnTGnF1mpuFUfYNl8vaWDSwvIk9 2FHMFlA+B+CcPn1REHqAVXpoNaaOtRVvDkfkZTN79SSK25gR+GEhYVGTOgBmtUDi36e9VT7kRPA /cyQOX8agTK6CZQEcZClRz0QDhx0PtBIh3Ilz2GA/tEjVFhgxim0m5Il8XgYs+L9towsaoeSZL0 D1TOzjH7C2P0wGcTS9BJ1geJD+qtfyKcxPID93esY7+vJ40uTOsk7/mniGJWwx8IyTcige//p7/ x5N2WCuSReVBCcjn9pwAl5lHO7A6/A3kqHcrWdUVLV+VQKR5lFFnLSc/47QCvkpojDYmVQOBZWL k/KzG/jd+XBp6CIm6Hw2BtgqRqQ3vNMntr0q3G X-Received: by 2002:a17:907:e10d:b0:b87:a0df:2f98 with SMTP id a640c23a62f3a-b87a0df4c96mr734668866b.63.1768854930996; Mon, 19 Jan 2026 12:35:30 -0800 (PST) Received: from localhost (ip87-106-108-193.pbiaas.com. [87.106.108.193]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b87959f6e53sm1217029466b.47.2026.01.19.12.35.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Jan 2026 12:35:30 -0800 (PST) From: =?UTF-8?q?G=C3=BCnther=20Noack?= To: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= , "John Johansen" Cc: =?UTF-8?q?G=C3=BCnther=20Noack?= , Justin Suess , linux-security-module@vger.kernel.org, "Tingmao Wang" , "Samasth Norway Ananda" , "Matthieu Buffet" , "Mikhail Ivanov" , konstantin.meskhidze@huawei.com, "Demi Marie Obenour" , "Alyssa Ross" , "Jann Horn" , "Tahera Fahimi" Subject: [PATCH v3 3/5] samples/landlock: Add support for named UNIX domain socket restrictions Date: Mon, 19 Jan 2026 21:34:56 +0100 Message-ID: <20260119203457.97676-6-gnoack3000@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260119203457.97676-2-gnoack3000@gmail.com> References: <20260119203457.97676-2-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 The access right for UNIX domain socket lookups 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 | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index e7af02f98208..8dab67ac7915 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c @@ -111,7 +111,8 @@ static int parse_path(char *env_path, const char ***const path_list) LANDLOCK_ACCESS_FS_WRITE_FILE | \ LANDLOCK_ACCESS_FS_READ_FILE | \ LANDLOCK_ACCESS_FS_TRUNCATE | \ - LANDLOCK_ACCESS_FS_IOCTL_DEV) + LANDLOCK_ACCESS_FS_IOCTL_DEV | \ + LANDLOCK_ACCESS_FS_RESOLVE_UNIX) /* clang-format on */ @@ -295,11 +296,12 @@ 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_RESOLVE_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 +446,11 @@ 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_RESOLVE_UNIX for ABI < 8 */ + ruleset_attr.handled_access_fs &= + ~LANDLOCK_ACCESS_FS_RESOLVE_UNIX; + __attribute__((fallthrough)); case LANDLOCK_ABI_LAST: break; default: -- 2.52.0