From nobody Sat Feb 7 06:21:48 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B5842E339B; Wed, 29 Oct 2025 12:24:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761740677; cv=none; b=cHWvFgJufqpMABzLOpkugYE2OenR5+bzcbqtPMqoENtCu1QOuF9w6xrLyt/fUPr45d6/boPFHOg9WUp7t0tVoz7NAmxHZB7PR8C0a+5sUUyErb8UoWRi5ff+SAF1kDbeowyl6CDGVzulrVix/SbWxpOOCBsoAuJ2FbFdVaTkzXg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761740677; c=relaxed/simple; bh=EesZuqsIPfrlBbuqThECgtbHVtp6afgnRdhVk6MbMkE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jUDmfM638DFEPIWcOy77GYo60sVYEdj6N0SoX0D6fiNf4Ss289l53UIGjkkvbilELwXBN1BgcmqrYS0odxP9iIo8c9umLQiC+hWIdCM/A/rqNkbcb3NzQrNSDq0LbnBYP0jgtb8etxLm2SJxxGljnWeXcYJsUbRhjmJt4mB+H1w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ji+buok9; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ji+buok9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EDA2C4CEFD; Wed, 29 Oct 2025 12:24:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761740676; bh=EesZuqsIPfrlBbuqThECgtbHVtp6afgnRdhVk6MbMkE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=ji+buok9FQwu3sc6mKYwAtx20blAq5aaOZcuG5QpgZtUMfmAd9TNkyeYdIfhuD5e3 9FfuGgyUzYIC5WxfWN/4imol0BSg6ImUtV1A/+69ht75FYpeYJd0Pb9SKAy0EiDXPv Kcy9wMOAbThoP5yGzc67hxHMg6K6jVKcKGYDGo5SWL/EoXL6XL4UaqZJPWnSI9rCLn B0OFO+xbX3ReF1Y3dfQxKWYVvyJevF7X2qOz3RhoO1D5MhVtzklc0f/74bsAEBwDfI 9+4SQKPKFlJ0GxZaxkwE6LsvEkuKC4B1s6NnsbxUZ8sw7kV2X/De9P21CKGbLeOoVF hecfYN+nK2jLg== From: Christian Brauner Date: Wed, 29 Oct 2025 13:21:00 +0100 Subject: [PATCH v4 47/72] selftests/namespaces: ninth listns() test Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251029-work-namespace-nstree-listns-v4-47-2e6f823ebdc0@kernel.org> References: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> In-Reply-To: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> To: linux-fsdevel@vger.kernel.org, Josef Bacik , Jeff Layton Cc: Jann Horn , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Lennart Poettering , Daan De Meyer , Aleksa Sarai , Amir Goldstein , Tejun Heo , Johannes Weiner , Thomas Gleixner , Alexander Viro , Jan Kara , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Eric Dumazet , Jakub Kicinski , netdev@vger.kernel.org, Arnd Bergmann , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=1703; i=brauner@kernel.org; h=from:subject:message-id; bh=EesZuqsIPfrlBbuqThECgtbHVtp6afgnRdhVk6MbMkE=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQysfXJHRS+s8Fv5f2vLx9LTK3MftnPkRpuzzmp6Ipq8 v77EpwbOkpZGMS4GGTFFFkc2k3C5ZbzVGw2ytSAmcPKBDKEgYtTACaS9p/hv4v9xhYusad+b1tf ML4s+hI1aXFb6UOrB5v/nbxguFTOZz4jw+ytbbZRbzUVJr/Qt07Sf8ejb/JchPVaQ3BmS0Bx6Kz 5bAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Test error cases for listns(). Signed-off-by: Christian Brauner --- tools/testing/selftests/namespaces/listns_test.c | 49 ++++++++++++++++++++= ++++ 1 file changed, 49 insertions(+) diff --git a/tools/testing/selftests/namespaces/listns_test.c b/tools/testi= ng/selftests/namespaces/listns_test.c index d3be6f97d34e..8a95789d6a87 100644 --- a/tools/testing/selftests/namespaces/listns_test.c +++ b/tools/testing/selftests/namespaces/listns_test.c @@ -627,4 +627,53 @@ TEST(listns_hierarchical_visibility) waitpid(pid, &status, 0); } =20 +/* + * Test error cases for listns(). + */ +TEST(listns_error_cases) +{ + struct ns_id_req req =3D { + .size =3D sizeof(req), + .spare =3D 0, + .ns_id =3D 0, + .ns_type =3D 0, + .spare2 =3D 0, + .user_ns_id =3D 0, + }; + __u64 ns_ids[10]; + int ret; + + /* Test with invalid flags */ + ret =3D sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0xFFFF); + if (errno =3D=3D ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + ASSERT_EQ(errno, EINVAL); + } + + /* Test with NULL ns_ids array */ + ret =3D sys_listns(&req, NULL, 10, 0); + ASSERT_LT(ret, 0); + + /* Test with invalid spare field */ + req.spare =3D 1; + ret =3D sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0); + if (errno =3D=3D ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + ASSERT_EQ(errno, EINVAL); + } + req.spare =3D 0; + + /* Test with huge nr_ns_ids */ + ret =3D sys_listns(&req, ns_ids, 2000000, 0); + if (errno =3D=3D ENOSYS) { + /* listns() not supported, skip this check */ + } else { + ASSERT_LT(ret, 0); + } +} + TEST_HARNESS_MAIN --=20 2.47.3