linux-hardening - [PATCH v3 2/5] selftests/mseal: add sealed madvise type

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Message-ID: <20240830180237.1220027-3-jeffxu@chromium.org>
Date: Fri, 30 Aug 2024 18:02:34 +0000
From: jeffxu@...omium.org
To: akpm@...ux-foundation.org
Cc: linux-kselftest@...r.kernel.org,
	linux-mm@...ck.org,
	linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	pedro.falcato@...il.com,
	willy@...radead.org,
	lorenzo.stoakes@...cle.com,
	broonie@...nel.org,
	vbabka@...e.cz,
	Liam.Howlett@...cle.com,
	rientjes@...gle.com,
	keescook@...omium.org,
	Jeff Xu <jeffxu@...omium.org>
Subject: [PATCH v3 2/5] selftests/mseal: add sealed madvise type

From: Jeff Xu <jeffxu@...omium.org>

Add a testcase to cover all sealed madvise type.

Signed-off-by: Jeff Xu <jeffxu@...omium.org>
---
 tools/testing/selftests/mm/mseal_test.c | 30 ++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c
index 7198f2314f9b..6d77dc9b5442 100644
--- a/tools/testing/selftests/mm/mseal_test.c
+++ b/tools/testing/selftests/mm/mseal_test.c
@@ -2121,6 +2121,32 @@ static void test_seal_madvise_nodiscard(bool seal)
 	REPORT_TEST_PASS();
 }
 
+static void test_seal_discard_madvise_advice(void)
+{
+	void *ptr;
+	unsigned long page_size = getpagesize();
+	unsigned long size = 4 * page_size;
+	int ret;
+	int sealed_advice[] = {MADV_FREE, MADV_DONTNEED,
+		MADV_DONTNEED_LOCKED, MADV_REMOVE,
+		MADV_DONTFORK, MADV_WIPEONFORK};
+	int size_sealed_advice = sizeof(sealed_advice) / sizeof(int);
+
+	setup_single_address(size, &ptr);
+	FAIL_TEST_IF_FALSE(ptr != (void *)-1);
+
+	ret = seal_single_address(ptr, size);
+	FAIL_TEST_IF_FALSE(!ret);
+
+	for (int i = 0; i < size_sealed_advice; i++) {
+		ret = sys_madvise(ptr, size, sealed_advice[i]);
+		FAIL_TEST_IF_FALSE(ret < 0);
+		FAIL_TEST_IF_FALSE(errno == EPERM);
+	}
+
+	REPORT_TEST_PASS();
+}
+
 int main(int argc, char **argv)
 {
 	bool test_seal = seal_support();
@@ -2142,7 +2168,7 @@ int main(int argc, char **argv)
 	if (!get_vma_size_supported())
 		ksft_exit_skip("get_vma_size not supported\n");
 
-	ksft_set_plan(88);
+	ksft_set_plan(89);
 
 	test_seal_addseal();
 	test_seal_unmapped_start();
@@ -2251,5 +2277,7 @@ int main(int argc, char **argv)
 	test_seal_discard_ro_anon_on_pkey(false);
 	test_seal_discard_ro_anon_on_pkey(true);
 
+	test_seal_discard_madvise_advice();
+
 	ksft_finished();
 }
-- 
2.46.0.469.g59c65b2a67-goog