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Message-ID: <20240829214352.963001-3-jeffxu@chromium.org>
Date: Thu, 29 Aug 2024 21:43:50 +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 v2 2/4] selftests/mm: mseal_test 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 | 108 +++++++++++++++++++++++-
1 file changed, 107 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c
index adc646cf576c..ae06c354220d 100644
--- a/tools/testing/selftests/mm/mseal_test.c
+++ b/tools/testing/selftests/mm/mseal_test.c
@@ -2121,6 +2121,107 @@ 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();
+}
+
+static void test_munmap_free_multiple_ranges(bool seal)
+{
+ void *ptr;
+ unsigned long page_size = getpagesize();
+ unsigned long size = 8 * page_size;
+ int ret;
+ int prot;
+
+ setup_single_address(size, &ptr);
+ FAIL_TEST_IF_FALSE(ptr != (void *)-1);
+
+ /* unmap one page from beginning. */
+ ret = sys_munmap(ptr, page_size);
+ FAIL_TEST_IF_FALSE(!ret);
+
+ /* unmap one page from middle. */
+ ret = sys_munmap(ptr + 4 * page_size, page_size);
+ FAIL_TEST_IF_FALSE(!ret);
+
+ size = get_vma_size(ptr + page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 3 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+ size = get_vma_size(ptr + 5 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 3 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+
+ /* seal the last page */
+ if (seal) {
+ ret = sys_mseal(ptr + 7 * page_size, page_size);
+ FAIL_TEST_IF_FALSE(!ret);
+
+ size = get_vma_size(ptr + 1 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 3 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+ size = get_vma_size(ptr + 5 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 2 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+ size = get_vma_size(ptr + 7 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 1 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+ }
+
+ /* munmap all 8 pages from beginning */
+ ret = sys_munmap(ptr, 8 * page_size);
+ if (seal) {
+ FAIL_TEST_IF_FALSE(ret);
+
+ /* verify mapping are not changed */
+ size = get_vma_size(ptr + 1 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 3 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+ size = get_vma_size(ptr + 5 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 2 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+
+ size = get_vma_size(ptr + 7 * page_size, &prot);
+ FAIL_TEST_IF_FALSE(size == 1 * page_size);
+ FAIL_TEST_IF_FALSE(prot == 4);
+ } else {
+ FAIL_TEST_IF_FALSE(!ret);
+
+ for (int i = 0; i < 8; i++) {
+ size = get_vma_size(ptr, &prot);
+ FAIL_TEST_IF_FALSE(size == 0);
+ }
+ }
+
+ REPORT_TEST_PASS();
+}
+
int main(int argc, char **argv)
{
bool test_seal = seal_support();
@@ -2142,7 +2243,7 @@ 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(91);
test_seal_addseal();
test_seal_unmapped_start();
@@ -2251,5 +2352,10 @@ 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();
+
+ test_munmap_free_multiple_ranges(false);
+ test_munmap_free_multiple_ranges(true);
+
ksft_finished();
}
--
2.46.0.469.g59c65b2a67-goog
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