From patchwork Mon Apr 29 19:19:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= X-Patchwork-Id: 13647586 Received: from smtp-bc0f.mail.infomaniak.ch (smtp-bc0f.mail.infomaniak.ch [45.157.188.15]) (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 08646839FD for ; Mon, 29 Apr 2024 19:25:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.157.188.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714418746; cv=none; b=pn9kH4VZrp2XUBMfMenCtQ1fgmVXaR6STypa1MGJAhALbxWzhJfOh0EP28FuTL+GZsvufRa7q580Jo+s96mtcv9ZJ6xLu0eFgwvXtDXMnh6XquDaBAouda6QkrlXR7BvL7YqIC/iha9VKf7LQhyU9T8WXOpNXlZqFSLe093UK0I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714418746; c=relaxed/simple; bh=uDMj38+fL//L5yXMbT+YKMkWgL3txmOHkNUEy1Src38=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tkMWFq3GrPb1eGHixWNLB/f97WlUezgpYq7Xj34b9QrIM9BltF/mJ4XGvHZpExaPFcfunbO3C34DFkDlVoFlmpC9LdZIMjombiSlJyiVdFAy/OgoyuRvMBPS7s8Ez0bAYmov2hjjoZ9peV4HW9ooJIeGIOeItHlt1wbiRtItRis= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net; spf=pass smtp.mailfrom=digikod.net; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b=NG0VA6yD; arc=none smtp.client-ip=45.157.188.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=digikod.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b="NG0VA6yD" Received: from smtp-4-0000.mail.infomaniak.ch (smtp-4-0000.mail.infomaniak.ch [10.7.10.107]) by smtp-4-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VStRm02zKz8B1; Mon, 29 Apr 2024 21:19:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714418355; bh=uDMj38+fL//L5yXMbT+YKMkWgL3txmOHkNUEy1Src38=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NG0VA6yDH70vKIGbabyBzpOFaTyb+OLMmYsrq2HFfce/EkAm6Pt5BX1UXPUc+NSAt KtIh0UiqAn0NL6foL4vQSwg84s4pFseDRAoagonAgB9iRkEEElLUghoIx8QXiUpVeP t87PZ7uuRC3y1OzKw3Q6hQXLnMm9e3WqJr2a1bk4= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VStRl2sCQzF8Z; Mon, 29 Apr 2024 21:19:15 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Shengyu Li , Shuah Khan Cc: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , "David S . Miller" , =?utf-8?q?G=C3=BCnther_Noack?= , Will Drewry , kernel test robot , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v3 2/9] selftests/landlock: Fix FS tests when run on a private mount point Date: Mon, 29 Apr 2024 21:19:04 +0200 Message-ID: <20240429191911.2552580-3-mic@digikod.net> In-Reply-To: <20240429191911.2552580-1-mic@digikod.net> References: <20240429191911.2552580-1-mic@digikod.net> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha According to the test environment, the mount point of the test's working directory may be shared or not, which changes the visibility of the nested "tmp" mount point for the test's parent process calling umount("tmp"). This was spotted while running tests in containers [1], where mount points are private. Cc: Günther Noack Cc: Shuah Khan Link: https://github.com/landlock-lsm/landlock-test-tools/pull/4 [1] Fixes: 41cca0542d7c ("selftests/harness: Fix TEST_F()'s vfork handling") Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240429191911.2552580-3-mic@digikod.net --- Changes since v1: * Update commit description. --- tools/testing/selftests/landlock/fs_test.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 9a6036fbf289..46b9effd53e4 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -293,7 +293,15 @@ static void prepare_layout(struct __test_metadata *const _metadata) static void cleanup_layout(struct __test_metadata *const _metadata) { set_cap(_metadata, CAP_SYS_ADMIN); - EXPECT_EQ(0, umount(TMP_DIR)); + if (umount(TMP_DIR)) { + /* + * According to the test environment, the mount point of the + * current directory may be shared or not, which changes the + * visibility of the nested TMP_DIR mount point for the test's + * parent process doing this cleanup. + */ + ASSERT_EQ(EINVAL, errno); + } clear_cap(_metadata, CAP_SYS_ADMIN); EXPECT_EQ(0, remove_path(TMP_DIR)); }