From patchwork Thu May 2 21:09:17 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: 13652096 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 92F8C17556B for ; Thu, 2 May 2024 21:15:43 +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=1714684545; cv=none; b=bdGiVaCCl3fNIPyKBJkfLbhRXKZ6QqYkv6GGmxzbVCZzw0OW24U7EMRu4VcCUpeHyxbn9Dvx99xG9YgMT/x2Uza560Mgy1gFNndrfqRRSjLvNFDi8fTX8VJhQ39Nk3uWl8bGy7cYJXT5mugOK7iFz/Xs0NOa2UAo/zjYs790ytE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684545; c=relaxed/simple; bh=H21Z2fTU/3Zi7Aj9M2B1LpFUqah0CIukLyC68VTbJtg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=VWXBJDjwFWjb3pBzaQdUJRxDG+Mr5pApthoNBHkVwayuu5ldYZhrpAYS/IymgtmJnH33EDYQQgjOKoTKIQJx42qn41GEIHXHtgXn2Wf6VHKFAytEoMLkh1RUt6bQ9/+6NkNekUtQhAtCBgrVaBfu3PWdvttWTAiKx1HXH1pvnto= 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=D918GByc; 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="D918GByc" 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 4VVmlh5gpMzMV0; Thu, 2 May 2024 23:09:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684176; bh=H21Z2fTU/3Zi7Aj9M2B1LpFUqah0CIukLyC68VTbJtg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D918GBycTCdRpdNtcRw290HDcN9+EsGCyrdTCt5CX2/A53BZ4sPZq+eGthQjwv06U HGYBCnSJDSRkLKMENWjQ56urmulaSzs7jm9r1p63kgEJrV5QpRmCDd1RPfKiOfu9hj l2y6L2cOa1LONUYumuUA3BwQeEsXF+LDYZdN2Fvs= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlb1bcXzHKq; Thu, 2 May 2024 23:09:31 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 01/10] selftests/pidfd: Fix config for pidfd_setns_test Date: Thu, 2 May 2024 23:09:17 +0200 Message-ID: <20240502210926.145539-2-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Required by switch_timens() to open /proc/self/ns/time_for_children. CONFIG_GENERIC_VDSO_TIME_NS is not available on UML, so pidfd_setns_test cannot be run successfully on this architecture. Cc: Shuah Khan Fixes: 2b40c5db73e2 ("selftests/pidfd: add pidfd setns tests") Reviewed-by: Kees Cook Reviewed-by: Christian Brauner Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-2-mic@digikod.net --- tools/testing/selftests/pidfd/config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/pidfd/config b/tools/testing/selftests/pidfd/config index f6f2965e17af..6133524710f7 100644 --- a/tools/testing/selftests/pidfd/config +++ b/tools/testing/selftests/pidfd/config @@ -3,5 +3,7 @@ CONFIG_IPC_NS=y CONFIG_USER_NS=y CONFIG_PID_NS=y CONFIG_NET_NS=y +CONFIG_TIME_NS=y +CONFIG_GENERIC_VDSO_TIME_NS=y CONFIG_CGROUPS=y CONFIG_CHECKPOINT_RESTORE=y From patchwork Thu May 2 21:09:18 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: 13652085 Received: from smtp-190a.mail.infomaniak.ch (smtp-190a.mail.infomaniak.ch [185.125.25.10]) (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 9F8A01635DB for ; Thu, 2 May 2024 21:09:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.125.25.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; cv=none; b=YJo6bq8SEwPy08ybfNWsopNFW/g5Rap6rys7BTfoEPls8c30d+nmizBIm1DCclxW07Ceh1Ir8JSS6bRuf+/Nbcbe0oY8vNNTyXSDC+Wfr6xR4AAZXoqSIBTqPayM5YsnCFd+t5gqhxss8mgAilEEGX01g9gP8mlmGxKwsZKkj7I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; c=relaxed/simple; bh=f/p1tOYqxe+c3NIjeiRTNzU4W1mMlKeloFw4NDWiog8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GjmvE+E3+GNxAiKMQVVDNKL8shZwYeG+3KnRtit88qLEwAUDVhwWjTkc5TX14LU7OKLRuQEfJJDbAoHGFRW0picVrTginSiFJaHcJNpnYGsVYqGH2LX5sYd0RqCdGZGg1+1qgz3nZ3xqI3DCKDSlAj4OS/VcGmE/1FaoHmbq/TY= 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=SDPWZaAp; arc=none smtp.client-ip=185.125.25.10 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="SDPWZaAp" Received: from smtp-3-0000.mail.infomaniak.ch (smtp-3-0000.mail.infomaniak.ch [10.4.36.107]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmlj5Qd9zKC9; Thu, 2 May 2024 23:09:37 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684177; bh=f/p1tOYqxe+c3NIjeiRTNzU4W1mMlKeloFw4NDWiog8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SDPWZaApk+TnghGGtnoL1SCVBkxYtTcyjZoa+3Lub7Ksb3aoZsVd84y/xUQDtlDYT VUsSTffM6hlnlO5Sg34eTga9pENM0ccsXB6jURu0T1jRMh1olGvkDxfBlgTm6i+F/c LpTpE2b6dpbzq45jQbyvfk+Jye528zAQf4U6oOpU= Received: from unknown by smtp-3-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlj1XQ7zYJX; Thu, 2 May 2024 23:09:37 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 02/10] selftests/landlock: Fix FS tests when run on a private mount point Date: Thu, 2 May 2024 23:09:18 +0200 Message-ID: <20240502210926.145539-3-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@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/20240502210926.145539-3-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)); } From patchwork Thu May 2 21:09:19 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: 13652086 Received: from smtp-190c.mail.infomaniak.ch (smtp-190c.mail.infomaniak.ch [185.125.25.12]) (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 CFD30181D19 for ; Thu, 2 May 2024 21:09:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.125.25.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; cv=none; b=bJ/XVDvQWsHvq+6Ikf/TfJceqIsZBJFnmThkxHzbRpOEuWeeiGCBCGZYQT7pTW5n1anlWarooH7GJsM0q3A+L2ReH0WvvfioKi6apJlLFDmHNeGIPCrtrb7IlONbUH80a8Arv1mPU/CVu6R4rs5yFzaG8sNLIcbnta+xsaIjCOg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; c=relaxed/simple; bh=o1BZa1ZTcA/1JqgMCw9VzGJzjIj9CX4NqTY0j+UJi3A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ngifeQ9Zo0A8IISQhYoWeD1F8KOjeFev/2rR64F+ypW1lVkhnPpSqbOBHZEnjHbkaGMnthIXqmr0SFtUUMo6q1eBckSZWEjwPOWEdm4zinp0YVs5PDBZo7aQ6EFtcCYUBz0AVQfLUrQeY9r/ZHTu6JxsZ1ZXGpCrSuQpNfQh47o= 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=ZCAO39UD; arc=none smtp.client-ip=185.125.25.12 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="ZCAO39UD" Received: from smtp-4-0000.mail.infomaniak.ch (smtp-4-0000.mail.infomaniak.ch [10.7.10.107]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmlk56XfzMR6; Thu, 2 May 2024 23:09:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684178; bh=o1BZa1ZTcA/1JqgMCw9VzGJzjIj9CX4NqTY0j+UJi3A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZCAO39UDMhXO/3Dy+ND/jBQS31eS7uykiSkNB+ceJtVo5mgfONIiXqx+uKzg0MHey l7DAy/5vzSpZtMS8neeTeIuPehnRGKLwpLuB+tCV9TNvGKjIbtTKRt4gSnTKJxzj5P QtRLy9/r+favJN/R3wyMVWNrNUQNgkkAaUILKej4= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlk1Kk4zJ1h; Thu, 2 May 2024 23:09:38 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 03/10] selftests/harness: Fix fixture teardown Date: Thu, 2 May 2024 23:09:19 +0200 Message-ID: <20240502210926.145539-4-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Make sure fixture teardowns are run when test cases failed, including when _metadata->teardown_parent is set to true. Make sure only one fixture teardown is run per test case, handling the case where the test child forks. Cc: Jakub Kicinski Cc: Shengyu Li Cc: Shuah Khan Fixes: 72d7cb5c190b ("selftests/harness: Prevent infinite loop due to Assert in FIXTURE_TEARDOWN") Fixes: 0710a1a73fb4 ("selftests/harness: Merge TEST_F_FORK() into TEST_F()") Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-4-mic@digikod.net --- tools/testing/selftests/kselftest_harness.h | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index d98702b6955d..55699a762c45 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -382,7 +382,10 @@ FIXTURE_DATA(fixture_name) self; \ pid_t child = 1; \ int status = 0; \ - bool jmp = false; \ + /* Makes sure there is only one teardown, even when child forks again. */ \ + bool *teardown = mmap(NULL, sizeof(*teardown), \ + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0); \ + *teardown = false; \ memset(&self, 0, sizeof(FIXTURE_DATA(fixture_name))); \ if (setjmp(_metadata->env) == 0) { \ /* Use the same _metadata. */ \ @@ -399,15 +402,16 @@ _metadata->exit_code = KSFT_FAIL; \ } \ } \ - else \ - jmp = true; \ if (child == 0) { \ - if (_metadata->setup_completed && !_metadata->teardown_parent && !jmp) \ + if (_metadata->setup_completed && !_metadata->teardown_parent && \ + __sync_bool_compare_and_swap(teardown, false, true)) \ fixture_name##_teardown(_metadata, &self, variant->data); \ _exit(0); \ } \ - if (_metadata->setup_completed && _metadata->teardown_parent) \ + if (_metadata->setup_completed && _metadata->teardown_parent && \ + __sync_bool_compare_and_swap(teardown, false, true)) \ fixture_name##_teardown(_metadata, &self, variant->data); \ + munmap(teardown, sizeof(*teardown)); \ if (!WIFEXITED(status) && WIFSIGNALED(status)) \ /* Forward signal to __wait_for_test(). */ \ kill(getpid(), WTERMSIG(status)); \ From patchwork Thu May 2 21:09:20 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: 13652084 Received: from smtp-42ae.mail.infomaniak.ch (smtp-42ae.mail.infomaniak.ch [84.16.66.174]) (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 51F61180A8E for ; Thu, 2 May 2024 21:09:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.16.66.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; cv=none; b=N5kORzyDf1mvskc0z9eR+rONXtm8m52oxlxj0uK2D4Qkuglqs6W0pEOvUQwMELfs2xu2FJBMMUrWa0npYJzCter5BevL+VQI3juNmKsOETHXy6mFpb5TUP+UycXULScldOFVHvjRKHnIZkca1OI1NMPkhBnPQoebwMYxKKXBAnc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684189; c=relaxed/simple; bh=XnNvbVOvU4F5weoM+nSBWGkMjO8ZUXv5u56jNpFRhMc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=AoOrU4z9NF9ZaWrcny5ONT3QUXb0Jx0D+EOZGt1CsUzwBGYNwUsHXm2NzPh8eEikx3uyumrd4gzWbMr01aXLVOVb9ScpMeAiddJU63Y0mds5Zd8P8rdMqUodQYxQUFw4Hx9SiRt9wABO54R23jS9HKQV1b5Y22Jtv2/1PydFYl0= 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=d3yrHP/w; arc=none smtp.client-ip=84.16.66.174 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="d3yrHP/w" Received: from smtp-4-0000.mail.infomaniak.ch (smtp-4-0000.mail.infomaniak.ch [10.7.10.107]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmlr4SZfzNWZ; Thu, 2 May 2024 23:09:44 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684184; bh=XnNvbVOvU4F5weoM+nSBWGkMjO8ZUXv5u56jNpFRhMc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d3yrHP/wnJRvWQRF8X6PUw7IPQZ1t8RBIXhFFgPM8UV3YmBblpDz1z5rDAvo8nJnY ZsFdz98qt1c69Ewve/TFgGOp4tOkBMTFdW7rU4A3URJ3Sc+vyLMDTm7Gyru8WFuC2O 92CTfz59o0fAE9PTsZGjvVdeqsQf6V0h0kxYtcvk= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmll0r8VzHKr; Thu, 2 May 2024 23:09:39 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v4 04/10] selftests/harness: Fix interleaved scheduling leading to race conditions Date: Thu, 2 May 2024 23:09:20 +0200 Message-ID: <20240502210926.145539-5-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Fix a race condition when running several FIXTURE_TEARDOWN() managing the same resource. This fixes a race condition in the Landlock file system tests when creating or unmounting the same directory. Using clone3() with CLONE_VFORK guarantees that the child and grandchild test processes are sequentially scheduled. This is implemented with a new clone3_vfork() helper replacing the fork() call. This avoids triggering this error in __wait_for_test(): Test ended in some other way [127] Cc: Christian Brauner Cc: David S. Miller Cc: Günther Noack Cc: Jakub Kicinski Cc: Mark Brown Cc: Shuah Khan Cc: Will Drewry 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/20240502210926.145539-5-mic@digikod.net --- Changes since v2: * Replace __attribute__((__unused__)) with inline for clone3_vfork() (suggested by Kees and Jakub) --- tools/testing/selftests/kselftest_harness.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 55699a762c45..9d7178a71c2c 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -66,6 +66,8 @@ #include #include #include +#include +#include #include "kselftest.h" @@ -80,6 +82,17 @@ # define TH_LOG_ENABLED 1 #endif +/* Wait for the child process to end but without sharing memory mapping. */ +static inline pid_t clone3_vfork(void) +{ + struct clone_args args = { + .flags = CLONE_VFORK, + .exit_signal = SIGCHLD, + }; + + return syscall(__NR_clone3, &args, sizeof(args)); +} + /** * TH_LOG() * @@ -1183,7 +1196,7 @@ void __run_test(struct __fixture_metadata *f, fflush(stdout); fflush(stderr); - t->pid = fork(); + t->pid = clone3_vfork(); if (t->pid < 0) { ksft_print_msg("ERROR SPAWNING TEST CHILD\n"); t->exit_code = KSFT_FAIL; From patchwork Thu May 2 21:09:21 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: 13652088 Received: from smtp-42aa.mail.infomaniak.ch (smtp-42aa.mail.infomaniak.ch [84.16.66.170]) (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 AE82F1C0DF8 for ; Thu, 2 May 2024 21:09:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.16.66.170 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684196; cv=none; b=k4ZPugn2ZhgYA/mmVgDcAWWY9PGiwYuI1dX38o2Ja/DIZ/ivRus4CHC37wu7HA7wb8kgK4HRKal6ZkWyS5OsT370GNhhpOzyfFLlkiiY/EaabyWF5Mrs+459fk0ihPzvnIUs51sbmW6wN3T2+W7+J8b0k24/E5FGxp6jOerpH3c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684196; c=relaxed/simple; bh=jw4R3rrY+OC2XdTr3iRaQSj/Q6GJ0Ni0bEq4asle6Y4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rz71KnHlcVtXDHgwxjdvu1HmhN4j/ukSeFesqBwme1hiZvh+OXXsJbtmgfZabMFhQXNXJn/QDrN8HZc6HcHp52ub08h5I4cWAUC3qIEh8aG/B1wudqdFxcQ9Ra6AHdI+CYf4DeBAKkPJ2G8xqE5d10nOb1Fh55omWZHQ4cbr13A= 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=aT7uiL4o; arc=none smtp.client-ip=84.16.66.170 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="aT7uiL4o" Received: from smtp-3-0001.mail.infomaniak.ch (smtp-3-0001.mail.infomaniak.ch [10.4.36.108]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmls6z3kzNgQ; Thu, 2 May 2024 23:09:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684185; bh=jw4R3rrY+OC2XdTr3iRaQSj/Q6GJ0Ni0bEq4asle6Y4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aT7uiL4oBzfeHAqB7ipNeHdwZrzsl6OSKadvxK/dR5Xs3HJLgiJex09UaspZf+E/h /VQRLz1oCr7N1porjxHlg1AJBsDSaZ8rROdV5NsZSskW+BWEGRydFDoQkmQ7GESMQj NEG/GcLbhdbrzGBgSfMeWY3u6IW5QiBKo/kKhNqg= Received: from unknown by smtp-3-0001.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmls00bGztFV; Thu, 2 May 2024 23:09:44 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 05/10] selftests/landlock: Do not allocate memory in fixture data Date: Thu, 2 May 2024 23:09:21 +0200 Message-ID: <20240502210926.145539-6-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Do not allocate self->dir_path in the test process because this would not be visible in the FIXTURE_TEARDOWN() process when relying on fork()/clone3() instead of vfork(). This change is required for a following commit removing vfork() call to not break the layout3_fs.* test cases. Cc: Günther Noack Cc: Shuah Khan Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-6-mic@digikod.net --- Changes since v1: * Extract change from a bigger patch (suggested by Kees). --- tools/testing/selftests/landlock/fs_test.c | 57 +++++++++++++--------- 1 file changed, 35 insertions(+), 22 deletions(-) diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 46b9effd53e4..1e2cffde02b5 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -9,6 +9,7 @@ #define _GNU_SOURCE #include +#include #include #include #include @@ -4624,7 +4625,6 @@ FIXTURE(layout3_fs) { bool has_created_dir; bool has_created_file; - char *dir_path; bool skip_test; }; @@ -4683,11 +4683,24 @@ FIXTURE_VARIANT_ADD(layout3_fs, hostfs) { .cwd_fs_magic = HOSTFS_SUPER_MAGIC, }; +static char *dirname_alloc(const char *path) +{ + char *dup; + + if (!path) + return NULL; + + dup = strdup(path); + if (!dup) + return NULL; + + return dirname(dup); +} + FIXTURE_SETUP(layout3_fs) { struct stat statbuf; - const char *slash; - size_t dir_len; + char *dir_path = dirname_alloc(variant->file_path); if (!supports_filesystem(variant->mnt.type) || !cwd_matches_fs(variant->cwd_fs_magic)) { @@ -4697,25 +4710,15 @@ FIXTURE_SETUP(layout3_fs) _metadata->teardown_parent = true; - slash = strrchr(variant->file_path, '/'); - ASSERT_NE(slash, NULL); - dir_len = (size_t)slash - (size_t)variant->file_path; - ASSERT_LT(0, dir_len); - self->dir_path = malloc(dir_len + 1); - self->dir_path[dir_len] = '\0'; - strncpy(self->dir_path, variant->file_path, dir_len); - prepare_layout_opt(_metadata, &variant->mnt); /* Creates directory when required. */ - if (stat(self->dir_path, &statbuf)) { + if (stat(dir_path, &statbuf)) { set_cap(_metadata, CAP_DAC_OVERRIDE); - EXPECT_EQ(0, mkdir(self->dir_path, 0700)) + EXPECT_EQ(0, mkdir(dir_path, 0700)) { TH_LOG("Failed to create directory \"%s\": %s", - self->dir_path, strerror(errno)); - free(self->dir_path); - self->dir_path = NULL; + dir_path, strerror(errno)); } self->has_created_dir = true; clear_cap(_metadata, CAP_DAC_OVERRIDE); @@ -4736,6 +4739,8 @@ FIXTURE_SETUP(layout3_fs) self->has_created_file = true; clear_cap(_metadata, CAP_DAC_OVERRIDE); } + + free(dir_path); } FIXTURE_TEARDOWN(layout3_fs) @@ -4754,16 +4759,17 @@ FIXTURE_TEARDOWN(layout3_fs) } if (self->has_created_dir) { + char *dir_path = dirname_alloc(variant->file_path); + set_cap(_metadata, CAP_DAC_OVERRIDE); /* * Don't check for error because the directory might already * have been removed (cf. release_inode test). */ - rmdir(self->dir_path); + rmdir(dir_path); clear_cap(_metadata, CAP_DAC_OVERRIDE); + free(dir_path); } - free(self->dir_path); - self->dir_path = NULL; cleanup_layout(_metadata); } @@ -4830,7 +4836,10 @@ TEST_F_FORK(layout3_fs, tag_inode_dir_mnt) TEST_F_FORK(layout3_fs, tag_inode_dir_child) { - layer3_fs_tag_inode(_metadata, self, variant, self->dir_path); + char *dir_path = dirname_alloc(variant->file_path); 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Thu, 2 May 2024 23:09:46 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 06/10] selftests/harness: Constify fixture variants Date: Thu, 2 May 2024 23:09:22 +0200 Message-ID: <20240502210926.145539-7-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha FIXTURE_VARIANT_ADD() types are passed as const pointers to FIXTURE_TEARDOWN(). Make that explicit by constifying the variants declarations. Cc: Shuah Khan Cc: Will Drewry Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-7-mic@digikod.net --- Changes since v1: * Extract change from a bigger patch (suggested by Kees). --- tools/testing/selftests/kselftest_harness.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 9d7178a71c2c..201040207c85 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -338,7 +338,7 @@ static inline pid_t clone3_vfork(void) * variant. */ #define FIXTURE_VARIANT_ADD(fixture_name, variant_name) \ - extern FIXTURE_VARIANT(fixture_name) \ + extern const FIXTURE_VARIANT(fixture_name) \ _##fixture_name##_##variant_name##_variant; \ static struct __fixture_variant_metadata \ _##fixture_name##_##variant_name##_object = \ @@ -350,7 +350,7 @@ static inline pid_t clone3_vfork(void) __register_fixture_variant(&_##fixture_name##_fixture_object, \ &_##fixture_name##_##variant_name##_object); \ } \ - FIXTURE_VARIANT(fixture_name) \ + const FIXTURE_VARIANT(fixture_name) \ _##fixture_name##_##variant_name##_variant = /** From patchwork Thu May 2 21:09:23 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: 13652087 Received: from smtp-190f.mail.infomaniak.ch (smtp-190f.mail.infomaniak.ch [185.125.25.15]) (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 ABA93194C9D for ; Thu, 2 May 2024 21:09:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.125.25.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684191; cv=none; b=mETMeoCto96jVE4tbV6Gr/reibU+Zu6ruy+Z9dZIXqcZUmZEvzlC7AL7a3hfKIN7pSKmTftGkfuMXeykHZYhsozzo1dXcdGRmT2Na2SCpkJo7SdUiIn357d94PEUqbPZT4HHo62K1Yq6E6RtfhWUxmWrUTpl1BOtgzJSykyV+EQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684191; c=relaxed/simple; bh=6QKYOrdzJppIqKyHAIvgA7WW5vjmQK1fdvdMiBvid54=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IXJCTFC2giXPyIUb8hUbJ3FRqD7unWX+JZz3RZMBNd2lBBjgtofW74O2S25Db0Gef6CCHxN7lIKOSSJSm80+DGUHqbgsZ8HGczvLzazD9F7DXEZ0hwhHkHNqaMRoic43saVvW3McHSEXkiyh6mNk81iwJQ/R0OFiXz9+eA9I6Pk= 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=me3UiuiT; arc=none smtp.client-ip=185.125.25.15 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="me3UiuiT" 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 4VVmlv741fzLQ2; Thu, 2 May 2024 23:09:47 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684187; bh=6QKYOrdzJppIqKyHAIvgA7WW5vjmQK1fdvdMiBvid54=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=me3UiuiTo9L4KbjRC31w7Yq+MfVhL+ME0ZFXeZJlS8sv2/4VjHU/NpfMs9etTiCC6 SD6s7G6p2gmfPDxQGFLBJIaUcJTt9Kt6l5POZAWhpAXq4zFdIzTXr4e0FPPevvlwCe 62bOqF9KHfmnxtDfs/LizG28HFnpM5Zw8dvsIxlg= Received: from unknown by smtp-4-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlv30fKzLRB; Thu, 2 May 2024 23:09:47 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 07/10] selftests/pidfd: Fix wrong expectation Date: Thu, 2 May 2024 23:09:23 +0200 Message-ID: <20240502210926.145539-8-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Replace a wrong EXPECT_GT(self->child_pid_exited, 0) with EXPECT_GE(), which will be actually tested on the parent and child sides with a following commit. Cc: Shuah Khan Reviewed-by: Kees Cook Reviewed-by: Christian Brauner Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-8-mic@digikod.net --- Changes since v1: * Extract change from a bigger patch (suggested by Kees). --- tools/testing/selftests/pidfd/pidfd_setns_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/pidfd/pidfd_setns_test.c b/tools/testing/selftests/pidfd/pidfd_setns_test.c index 6e2f2cd400ca..47746b0c6acd 100644 --- a/tools/testing/selftests/pidfd/pidfd_setns_test.c +++ b/tools/testing/selftests/pidfd/pidfd_setns_test.c @@ -158,7 +158,7 @@ FIXTURE_SETUP(current_nsset) /* Create task that exits right away. */ self->child_pid_exited = create_child(&self->child_pidfd_exited, CLONE_NEWUSER | CLONE_NEWNET); - EXPECT_GT(self->child_pid_exited, 0); + EXPECT_GE(self->child_pid_exited, 0); if (self->child_pid_exited == 0) _exit(EXIT_SUCCESS); From patchwork Thu May 2 21:09:24 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: 13652091 Received: from smtp-42a8.mail.infomaniak.ch (smtp-42a8.mail.infomaniak.ch [84.16.66.168]) (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 B9C871C65E4 for ; Thu, 2 May 2024 21:09:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.16.66.168 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684199; cv=none; b=ecrfQ8LSCYkymiXfVSdKn3W9lzrXBf+OOjHuP8Q0otWj1TxmdGVEXX4BQHxUnLXLVXp19lo7hJkjPA8xMoYSOY067NwyuytTAp2tlbwrsFQ8t3TE5M3QdKEOSiuLllSrECVg3GQ0IbwVoZ9NaOzydY7qvukadqTtrpbWZ16ZiNA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684199; c=relaxed/simple; bh=15Py21Y0wiTWxGYN8/FXrHgQsVA/abvkNE37zFQYec8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=nOpXglCatZ9QmTxoNih1M75lmv6RtgXoO7KS+84wU9SVHeG1SMZefFpvMG0Dy3dwmCObyQRz46ahHlMTbxIj83HKtm2pZ49+nZGKraWnFq0s0ZkIsXjfPTbPuDPV+Q9EF2qPgzxNMSBP/6i+NoB1KdjTCLwTS9qcpRdLlveKtAM= 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=me/zohhA; arc=none smtp.client-ip=84.16.66.168 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="me/zohhA" Received: from smtp-3-0001.mail.infomaniak.ch (smtp-3-0001.mail.infomaniak.ch [10.4.36.108]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmlw6pyKzMV6; Thu, 2 May 2024 23:09:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684188; bh=15Py21Y0wiTWxGYN8/FXrHgQsVA/abvkNE37zFQYec8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=me/zohhAObZfSouj8HYKxLVfoDGVy4fwktvPiW/nUVS9aJMw3G1n6T81dfmH8G5rw FKzDsnhS5BUV50Lc7E/5JM75UTVhqHokaSNa9tVcmeTJK2lZ8qAmmY0XOBqiDpltn7 I2WlZqKMKOXOQVYWA05QSYyI+dSCmMx4vk7DXDNg= Received: from unknown by smtp-3-0001.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlw3F5rzqpc; Thu, 2 May 2024 23:09:48 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Shuah Khan Subject: [PATCH v4 08/10] selftests/harness: Share _metadata between forked processes Date: Thu, 2 May 2024 23:09:24 +0200 Message-ID: <20240502210926.145539-9-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Unconditionally share _metadata between all forked processes, which enables to actually catch errors which were previously ignored. This is required for a following commit replacing vfork() with clone3() and CLONE_VFORK (i.e. not sharing the full memory) . It should also be useful to share _metadata to extend expectations to test process's forks. For instance, this change identified a wrong expectation in pidfd_setns_test. Cc: Jakub Kicinski Cc: Shuah Khan Cc: Will Drewry Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-9-mic@digikod.net --- Changes since v1: * Extract change from a bigger patch (suggested by Kees). --- tools/testing/selftests/kselftest_harness.h | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 201040207c85..abf2ffd2094f 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -430,19 +430,17 @@ static inline pid_t clone3_vfork(void) kill(getpid(), WTERMSIG(status)); \ __test_check_assert(_metadata); \ } \ - static struct __test_metadata \ - _##fixture_name##_##test_name##_object = { \ - .name = #test_name, \ - .fn = &wrapper_##fixture_name##_##test_name, \ - .fixture = &_##fixture_name##_fixture_object, \ - .termsig = signal, \ - .timeout = tmout, \ - .teardown_parent = false, \ - }; \ static void __attribute__((constructor)) \ _register_##fixture_name##_##test_name(void) \ { \ - __register_test(&_##fixture_name##_##test_name##_object); \ + struct __test_metadata *object = mmap(NULL, sizeof(*object), \ + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0); \ + object->name = #test_name; \ + object->fn = &wrapper_##fixture_name##_##test_name; \ + object->fixture = &_##fixture_name##_fixture_object; \ + object->termsig = signal; \ + object->timeout = tmout; \ + __register_test(object); \ } \ static void fixture_name##_##test_name( \ struct __test_metadata __attribute__((unused)) *_metadata, \ From patchwork Thu May 2 21:09:25 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: 13652092 Received: from smtp-42a8.mail.infomaniak.ch (smtp-42a8.mail.infomaniak.ch [84.16.66.168]) (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 C7D961C689D for ; Thu, 2 May 2024 21:09:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=84.16.66.168 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684201; cv=none; b=sWoZdvvvw6IZVMDK9hvdCl+i2QR516HYpNqxAP7LHWOUyGaIKRKgH+qnPNdlHe05qq24msSVdBBPOMdiDSeqtw4KKMCIGfolmt5G3A/T3C5b0fLbEfGVU+csiSRoknzy5d4DYUYUdmU3ir4zeuz0NZ3ByCPQdE60RiZDQcZRz18= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684201; c=relaxed/simple; bh=NLhMzxe/FqUv13PMBWM+genqcakoB2tWTyZTcB0rzls=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gv7BSRt2rOQRijNy8e9hmzQrYXp9qC79bxqSaLhoo/o1qb1WD43km7g3/HgdylECZ3aPCLcRRMv2i4AnqIVfrr6tWi5T3iJVEfhsdYWDdypd1RsSzLKVWpgTM7xZ3UJnddN8iO5LkD47nhGHO3GP9XsCZa5DTXhWWDgKAQJnuVs= 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=XhZDG8fH; arc=none smtp.client-ip=84.16.66.168 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="XhZDG8fH" Received: from smtp-4-0001.mail.infomaniak.ch (smtp-4-0001.mail.infomaniak.ch [10.7.10.108]) by smtp-3-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4VVmly6nj9zPRQ; Thu, 2 May 2024 23:09:50 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=digikod.net; s=20191114; t=1714684190; bh=NLhMzxe/FqUv13PMBWM+genqcakoB2tWTyZTcB0rzls=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XhZDG8fHuY5WYfK5fo1ZtWErt2VoORPWHdMckOFatEqc8bBm2aU53Vee/Tzuxcno/ kL9H37kf0PCcNGAGzvWY/Cac1zVoNmYeT8LnWte3mVt1Oqfp8jGavmxP6fo54WUhyB vhowNd9qMT5hoS8zCEBTwYQ0G0ErXHyVIoRkS7VQ= Received: from unknown by smtp-4-0001.mail.infomaniak.ch (Postfix) with ESMTPA id 4VVmlx2cz0zXWy; Thu, 2 May 2024 23:09:49 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Christian Brauner , Jakub Kicinski , Kees Cook , Mark Brown , Sean Christopherson , 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 , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v4 09/10] selftests/harness: Fix vfork() side effects Date: Thu, 2 May 2024 23:09:25 +0200 Message-ID: <20240502210926.145539-10-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Setting the time namespace with CLONE_NEWTIME returns -EUSERS if the calling thread shares memory with another thread (because of the shared vDSO), which is the case when it is created with vfork(). Fix pidfd_setns_test by replacing test harness's vfork() call with a clone3() call with CLONE_VFORK, and an explicit sharing of the _metadata and self objects. Replace _metadata->teardown_parent with a new FIXTURE_TEARDOWN_PARENT() helper that can replace FIXTURE_TEARDOWN(). This is a cleaner approach and it enables to selectively share the fixture data between the child process running tests and the parent process running the fixture teardown. This also avoids updating several tests to not rely on the self object's copy-on-write property (e.g. storing the returned value of a fork() call). Cc: Christian Brauner Cc: David S. Miller Cc: Günther Noack Cc: Jakub Kicinski Cc: Mark Brown Cc: Shuah Khan Cc: Will Drewry Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-lkp/202403291015.1fcfa957-oliver.sang@intel.com Fixes: 0710a1a73fb4 ("selftests/harness: Merge TEST_F_FORK() into TEST_F()") Reviewed-by: Kees Cook Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-10-mic@digikod.net --- Changes since v1: * Split changes (suggested by Kees). * Improve documentation. * Remove the static fixture_name##_teardown_parent initialisation to false (as suggested by checkpatch.pl). --- tools/testing/selftests/kselftest_harness.h | 66 ++++++++++++++++----- tools/testing/selftests/landlock/fs_test.c | 16 ++--- 2 files changed, 57 insertions(+), 25 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index abf2ffd2094f..d3837a3a584e 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -294,6 +294,32 @@ static inline pid_t clone3_vfork(void) * A bare "return;" statement may be used to return early. */ #define FIXTURE_TEARDOWN(fixture_name) \ + static const bool fixture_name##_teardown_parent; \ + __FIXTURE_TEARDOWN(fixture_name) + +/** + * FIXTURE_TEARDOWN_PARENT() + * *_metadata* is included so that EXPECT_*, ASSERT_* etc. work correctly. + * + * @fixture_name: fixture name + * + * .. code-block:: c + * + * FIXTURE_TEARDOWN_PARENT(fixture_name) { implementation } + * + * Same as FIXTURE_TEARDOWN() but run this code in a parent process. This + * enables the test process to drop its privileges without impacting the + * related FIXTURE_TEARDOWN_PARENT() (e.g. to remove files from a directory + * where write access was dropped). + * + * To make it possible for the parent process to use *self*, share (MAP_SHARED) + * the fixture data between all forked processes. + */ +#define FIXTURE_TEARDOWN_PARENT(fixture_name) \ + static const bool fixture_name##_teardown_parent = true; \ + __FIXTURE_TEARDOWN(fixture_name) + +#define __FIXTURE_TEARDOWN(fixture_name) \ void fixture_name##_teardown( \ struct __test_metadata __attribute__((unused)) *_metadata, \ FIXTURE_DATA(fixture_name) __attribute__((unused)) *self, \ @@ -368,10 +394,11 @@ static inline pid_t clone3_vfork(void) * Very similar to TEST() except that *self* is the setup instance of fixture's * datatype exposed for use by the implementation. * - * The @test_name code is run in a separate process sharing the same memory - * (i.e. vfork), which means that the test process can update its privileges - * without impacting the related FIXTURE_TEARDOWN() (e.g. to remove files from - * a directory where write access was dropped). + * The _metadata object is shared (MAP_SHARED) with all the potential forked + * processes, which enables them to use EXCEPT_*() and ASSERT_*(). + * + * The *self* object is only shared with the potential forked processes if + * FIXTURE_TEARDOWN_PARENT() is used instead of FIXTURE_TEARDOWN(). */ #define TEST_F(fixture_name, test_name) \ __TEST_F_IMPL(fixture_name, test_name, -1, TEST_TIMEOUT_DEFAULT) @@ -392,39 +419,49 @@ static inline pid_t clone3_vfork(void) struct __fixture_variant_metadata *variant) \ { \ /* fixture data is alloced, setup, and torn down per call. */ \ - FIXTURE_DATA(fixture_name) self; \ + FIXTURE_DATA(fixture_name) self_private, *self = NULL; \ pid_t child = 1; \ int status = 0; \ /* Makes sure there is only one teardown, even when child forks again. */ \ bool *teardown = mmap(NULL, sizeof(*teardown), \ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0); \ *teardown = false; \ - memset(&self, 0, sizeof(FIXTURE_DATA(fixture_name))); \ + if (sizeof(*self) > 0) { \ + if (fixture_name##_teardown_parent) { \ + self = mmap(NULL, sizeof(*self), PROT_READ | PROT_WRITE, \ + MAP_SHARED | MAP_ANONYMOUS, -1, 0); \ + } else { \ + memset(&self_private, 0, sizeof(self_private)); \ + self = &self_private; \ + } \ + } \ if (setjmp(_metadata->env) == 0) { \ - /* Use the same _metadata. */ \ - child = vfork(); \ + /* _metadata and potentially self are shared with all forks. */ \ + child = clone3_vfork(); \ if (child == 0) { \ - fixture_name##_setup(_metadata, &self, variant->data); \ + fixture_name##_setup(_metadata, self, variant->data); \ /* Let setup failure terminate early. */ \ if (_metadata->exit_code) \ _exit(0); \ _metadata->setup_completed = true; \ - fixture_name##_##test_name(_metadata, &self, variant->data); \ + fixture_name##_##test_name(_metadata, self, variant->data); \ } else if (child < 0 || child != waitpid(child, &status, 0)) { \ ksft_print_msg("ERROR SPAWNING TEST GRANDCHILD\n"); \ _metadata->exit_code = KSFT_FAIL; \ } \ } \ if (child == 0) { \ - if (_metadata->setup_completed && !_metadata->teardown_parent && \ + if (_metadata->setup_completed && !fixture_name##_teardown_parent && \ __sync_bool_compare_and_swap(teardown, false, true)) \ - fixture_name##_teardown(_metadata, &self, variant->data); \ + fixture_name##_teardown(_metadata, self, variant->data); \ _exit(0); \ } \ - if (_metadata->setup_completed && _metadata->teardown_parent && \ + if (_metadata->setup_completed && fixture_name##_teardown_parent && \ __sync_bool_compare_and_swap(teardown, false, true)) \ - fixture_name##_teardown(_metadata, &self, variant->data); \ + fixture_name##_teardown(_metadata, self, variant->data); \ munmap(teardown, sizeof(*teardown)); \ + if (self && fixture_name##_teardown_parent) \ + munmap(self, sizeof(*self)); \ if (!WIFEXITED(status) && WIFSIGNALED(status)) \ /* Forward signal to __wait_for_test(). */ \ kill(getpid(), WTERMSIG(status)); \ @@ -895,7 +932,6 @@ struct __test_metadata { bool timed_out; /* did this test timeout instead of exiting? */ bool aborted; /* stopped test due to failed ASSERT */ bool setup_completed; /* did setup finish? */ - bool teardown_parent; /* run teardown in a parent process */ jmp_buf env; /* for exiting out of test early */ struct __test_results *results; struct __test_metadata *prev, *next; diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 1e2cffde02b5..27744524df51 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -286,8 +286,6 @@ static void prepare_layout_opt(struct __test_metadata *const _metadata, static void prepare_layout(struct __test_metadata *const _metadata) { - _metadata->teardown_parent = true; - prepare_layout_opt(_metadata, &mnt_tmp); } @@ -316,7 +314,7 @@ FIXTURE_SETUP(layout0) prepare_layout(_metadata); } -FIXTURE_TEARDOWN(layout0) +FIXTURE_TEARDOWN_PARENT(layout0) { cleanup_layout(_metadata); } @@ -379,7 +377,7 @@ FIXTURE_SETUP(layout1) create_layout1(_metadata); } -FIXTURE_TEARDOWN(layout1) +FIXTURE_TEARDOWN_PARENT(layout1) { remove_layout1(_metadata); @@ -3692,7 +3690,7 @@ FIXTURE_SETUP(ftruncate) create_file(_metadata, file1_s1d1); } -FIXTURE_TEARDOWN(ftruncate) +FIXTURE_TEARDOWN_PARENT(ftruncate) { EXPECT_EQ(0, remove_path(file1_s1d1)); cleanup_layout(_metadata); @@ -3870,7 +3868,7 @@ FIXTURE_SETUP(layout1_bind) clear_cap(_metadata, CAP_SYS_ADMIN); } -FIXTURE_TEARDOWN(layout1_bind) +FIXTURE_TEARDOWN_PARENT(layout1_bind) { /* umount(dir_s2d2)) is handled by namespace lifetime. */ @@ -4275,7 +4273,7 @@ FIXTURE_SETUP(layout2_overlay) clear_cap(_metadata, CAP_SYS_ADMIN); } -FIXTURE_TEARDOWN(layout2_overlay) +FIXTURE_TEARDOWN_PARENT(layout2_overlay) { if (self->skip_test) SKIP(return, "overlayfs is not supported (teardown)"); @@ -4708,8 +4706,6 @@ FIXTURE_SETUP(layout3_fs) SKIP(return, "this filesystem is not supported (setup)"); } - _metadata->teardown_parent = true; - prepare_layout_opt(_metadata, &variant->mnt); /* Creates directory when required. */ @@ -4743,7 +4739,7 @@ FIXTURE_SETUP(layout3_fs) free(dir_path); } -FIXTURE_TEARDOWN(layout3_fs) +FIXTURE_TEARDOWN_PARENT(layout3_fs) { if (self->skip_test) SKIP(return, "this filesystem is not supported (teardown)"); From patchwork Thu May 2 21:09:26 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: 13652089 Received: from smtp-42a9.mail.infomaniak.ch (smtp-42a9.mail.infomaniak.ch [84.16.66.169]) (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 00E1418133D for ; Thu, 2 May 2024 21:09:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Miller" , =?utf-8?q?G=C3=BCnther_Noack?= , Will Drewry , kernel test robot , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v4 10/10] selftests/harness: Fix TEST_F()'s exit codes Date: Thu, 2 May 2024 23:09:26 +0200 Message-ID: <20240502210926.145539-11-mic@digikod.net> In-Reply-To: <20240502210926.145539-1-mic@digikod.net> References: <20240502210926.145539-1-mic@digikod.net> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Always forward grandchild's exit codes to its parent. This fixes KVM_ONE_VCPU_TEST(). Initial patch written by Sean Christopherson [1]. Cc: Jakub Kicinski Cc: Kees Cook Cc: Mark Brown Cc: Sean Christopherson Cc: Shuah Khan Cc: Will Drewry Link: https://lore.kernel.org/r/ZjPelW6-AbtYvslu@google.com [1] Fixes: 0710a1a73fb4 ("selftests/harness: Merge TEST_F_FORK() into TEST_F()") Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20240502210926.145539-11-mic@digikod.net --- Changes since v3: * New patch mainly from Sean Christopherson. --- tools/testing/selftests/kselftest_harness.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index d3837a3a584e..77d4fac8d0c0 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -442,7 +442,7 @@ static inline pid_t clone3_vfork(void) fixture_name##_setup(_metadata, self, variant->data); \ /* Let setup failure terminate early. */ \ if (_metadata->exit_code) \ - _exit(0); \ + _exit(_metadata->exit_code); \ _metadata->setup_completed = true; \ fixture_name##_##test_name(_metadata, self, variant->data); \ } else if (child < 0 || child != waitpid(child, &status, 0)) { \ @@ -454,7 +454,7 @@ static inline pid_t clone3_vfork(void) if (_metadata->setup_completed && !fixture_name##_teardown_parent && \ __sync_bool_compare_and_swap(teardown, false, true)) \ fixture_name##_teardown(_metadata, self, variant->data); \ - _exit(0); \ + _exit(_metadata->exit_code); \ } \ if (_metadata->setup_completed && fixture_name##_teardown_parent && \ __sync_bool_compare_and_swap(teardown, false, true)) \ @@ -462,8 +462,10 @@ static inline pid_t clone3_vfork(void) munmap(teardown, sizeof(*teardown)); \ if (self && fixture_name##_teardown_parent) \ munmap(self, sizeof(*self)); \ - if (!WIFEXITED(status) && WIFSIGNALED(status)) \ - /* Forward signal to __wait_for_test(). */ \ + /* Forward exit codes and signals to __wait_for_test(). */ \ + if (WIFEXITED(status)) \ + _exit(_metadata->exit_code); \ + if (WIFSIGNALED(status)) \ kill(getpid(), WTERMSIG(status)); \ __test_check_assert(_metadata); \ } \