From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 6228037D135; Mon, 4 May 2026 09:33:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777887223; cv=none; b=tb+d3bLBjF2jVzNJOkQPjV1X8Wfs8Kcw0djL7cpJ2IeeQt+JnQ8NGBMfzzuLFBdlCodh7stDe51eLd+oIZkCzvNNwc+k1Mdhcr8Tg5N34/XPsLaZJsLflBOiYzpFCmM4JwFsbgy3bXyhN64Po8dbx8xEzk/uAsDi4JwJZ7jUuls= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777887223; c=relaxed/simple; bh=TauxOYpi03qFPcnNm3AqoC889sKpf9SoQTyDHbRy9hg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VTBduZgBvyQPeQEKPVLv/odn6e1LPk5SLHgem3w+hguTnflS3SNEQaSAgfZUh7QK5AqIQ7Tvjk8BKERPP/Rt6erJWpiyS/MRCBrawhHEiVdOsRLCGb2XXXymXbEQ+VuzsRbgv0C5GYo69+WSJAZl/GzaQtF0wr2wafzcsfnWYfo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=BqTtpk+C; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=ZanvYVfs; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="BqTtpk+C"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ZanvYVfs" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1777887220; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PrS0k2Drv80OdaJ1YmUo8BOgCdISFvzkHUaFnv4iGkM=; b=BqTtpk+CXBSv6WfgRGnKdP1smf/6qR/nWC5fL4wYSSvJxXy7s4NFkunXA3qfZLfKUsavGv +wWq9EV1hah3Ei3nPcAx79AIcSZ3TyR/mBlC1+p00FxtQ5KObA4ZCuFlDx85ejGxU7UuiJ hdLrvogkSvos2xghKe2i5Zg0/+3dTwMhgb/xDUIQfGz/hiBploTjsyScRo9K3Lp063ksFZ KzgVsVr3Wz1txl6BZ4AYTQWPMD8nC9S9mrHhWkoN7NIsQukE0LAQCDjOiPaHKUWEQNa4HQ +4ImbazmNQDpitSLHA2xSNSI6H6qGMn2BzEBX84vIbkUnsWP6iIGtvp6ILTFkw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1777887220; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PrS0k2Drv80OdaJ1YmUo8BOgCdISFvzkHUaFnv4iGkM=; b=ZanvYVfsjTNqFNMSVnatHHJiQ1Hha7pnJ5tAY/2b8uIVYGIg3BEt/sK+UwR+ADsManbVrj jvpfybI/ZMvglgCw== Date: Mon, 04 May 2026 11:33:27 +0200 Subject: [PATCH v6 11/11] kunit: uapi: Validate usability of /proc Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260504-kunit-kselftests-v6-11-712d3d526d97@linutronix.de> References: <20260504-kunit-kselftests-v6-0-712d3d526d97@linutronix.de> In-Reply-To: <20260504-kunit-kselftests-v6-0-712d3d526d97@linutronix.de> To: Nathan Chancellor , Andrew Morton , Willy Tarreau , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Brendan Higgins , Shuah Khan , Jonathan Corbet , Nicolas Schier , Kees Cook , Alexander Viro , Christian Brauner , Jan Kara , Christoph Hellwig , Luis Chamberlain , David Gow , Rae Moar Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, workflows@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Christophe Leroy , Nicolas Schier X-Developer-Signature: v=1; a=ed25519-sha256; t=1777887211; l=4066; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=TauxOYpi03qFPcnNm3AqoC889sKpf9SoQTyDHbRy9hg=; b=1hWzT6507OnOzELkr3kP6C8GS+SfvKLQdLpAiBvyOpYn0JryvJmarJBk+xXRskvu55bxKdheG G3cv2zqewfuCaw+z7LMh9TYx3Tv2oeaAUW9Qr91SEgKS00S4V/4Fr0G X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= Show that the selftests are executed from a fairly "normal" userspace context. Signed-off-by: Thomas Weißschuh --- MAINTAINERS | 1 + lib/kunit/Makefile | 9 ++++++++ lib/kunit/kunit-test-uapi.c | 51 +++++++++++++++++++++++++++++++++++++++++++++ lib/kunit/kunit-test.c | 24 ++++++++++++++++++++- 4 files changed, 84 insertions(+), 1 deletion(-) diff --git a/MAINTAINERS b/MAINTAINERS index 4e8cf9fa7aa9..693aafe4d3f9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14400,6 +14400,7 @@ M: Thomas Weißschuh S: Maintained F: include/kunit/uapi.h F: lib/kunit/kunit-example-uapi.c +F: lib/kunit/kunit-test-uapi.c F: lib/kunit/kunit-uapi.c F: lib/kunit/uapi-preinit.c diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 05991d69aa70..1a4af6b66524 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -29,6 +29,15 @@ endif obj-$(if $(CONFIG_KUNIT),y) += hooks.o obj-$(CONFIG_KUNIT_TEST) += kunit-test.o + +userprogs += kunit-test-uapi +kunit-test-uapi-userccflags := -static $(NOLIBC_USERCFLAGS) + +ifdef CONFIG_KUNIT_UAPI +CFLAGS_kunit-test.o := -Wa,-I$(obj) +$(obj)/kunit-test.o: $(obj)/kunit-test-uapi +endif + obj-$(CONFIG_KUNIT_TEST) += platform-test.o # string-stream-test compiles built-in only. diff --git a/lib/kunit/kunit-test-uapi.c b/lib/kunit/kunit-test-uapi.c new file mode 100644 index 000000000000..2e75e57865e3 --- /dev/null +++ b/lib/kunit/kunit-test-uapi.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit Userspace selftest. + * + * Copyright (C) 2026, Linutronix GmbH. + * Author: Thomas Weißschuh + * + * This is *userspace* code. + */ + +#include +#include +#include + +#include "../../tools/testing/selftests/kselftest.h" + +static void test_procfs(void) +{ + char buf[256]; + ssize_t r; + int fd; + + fd = open("/proc/self/comm", O_RDONLY); + if (fd == -1) { + ksft_test_result_fail("procfs: open() failed: %s\n", strerror(errno)); + return; + } + + r = read(fd, buf, sizeof(buf)); + close(fd); + + if (r == -1) { + ksft_test_result_fail("procfs: read() failed: %s\n", strerror(errno)); + return; + } + + if (r != 16 || strncmp("kunit-test-uapi\n", buf, 16) != 0) { + ksft_test_result_fail("procfs: incorrect comm\n"); + return; + } + + ksft_test_result_pass("procfs\n"); +} + +int main(void) +{ + ksft_print_header(); + ksft_set_plan(1); + test_procfs(); + ksft_finished(); +} diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c index 126e30879dad..b62e24fb9c55 100644 --- a/lib/kunit/kunit-test.c +++ b/lib/kunit/kunit-test.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include @@ -914,10 +915,31 @@ static struct kunit_suite kunit_stub_test_suite = { .test_cases = kunit_stub_test_cases, }; +static void kunit_uapi_test(struct kunit *test) +{ + KUNIT_UAPI_EMBED_BLOB(kunit_test_uapi, "kunit-test-uapi"); + + if (IS_ENABLED(CONFIG_KUNIT_UAPI)) + kunit_uapi_run_kselftest(test, &kunit_test_uapi); + else + kunit_skip(test, "CONFIG_KUNIT_UAPI is not enabled"); +} + +static struct kunit_case kunit_uapi_test_cases[] = { + KUNIT_CASE(kunit_uapi_test), + {} +}; + +static struct kunit_suite kunit_uapi_test_suite = { + .name = "kunit_uapi", + .test_cases = kunit_uapi_test_cases, +}; + kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite, &kunit_log_test_suite, &kunit_status_test_suite, &kunit_current_test_suite, &kunit_device_test_suite, - &kunit_fault_test_suite, &kunit_stub_test_suite); + &kunit_fault_test_suite, &kunit_stub_test_suite, + &kunit_uapi_test_suite); MODULE_DESCRIPTION("KUnit test for core test infrastructure"); MODULE_LICENSE("GPL v2"); -- 2.53.0