From: Sandipan Das <sandipan@linux.ibm.com>
To: shuah@kernel.org, skhan@linuxfoundation.org,
linux-kselftest@vger.kernel.org
Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
x86@kernel.org, linux-mm@kvack.org, fweimer@redhat.com,
dave.hansen@intel.com, linuxram@us.ibm.com, mhocko@kernel.org,
mingo@redhat.com, aneesh.kumar@linux.ibm.com,
bauerman@linux.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au
Subject: [PATCH v18 18/24] selftests/vm/pkeys: Associate key on a mapped page and detect write violation
Date: Thu, 30 Jan 2020 12:07:00 +0530 [thread overview]
Message-ID: <283570a3a387fb7430c8a752bd0ace8e223121e6.1580365432.git.sandipan@linux.ibm.com> (raw)
In-Reply-To: <cover.1580365432.git.sandipan@linux.ibm.com>
In-Reply-To: <cover.1580365432.git.sandipan@linux.ibm.com>
From: Ram Pai <linuxram@us.ibm.com>
Detect write-violation on a page to which write-disabled
key is associated much after the page is mapped.
cc: Dave Hansen <dave.hansen@intel.com>
cc: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
---
tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
index f65d384ef6a0..cb31a5cdf6d9 100644
--- a/tools/testing/selftests/vm/protection_keys.c
+++ b/tools/testing/selftests/vm/protection_keys.c
@@ -1002,6 +1002,17 @@ void test_read_of_access_disabled_region_with_page_already_mapped(int *ptr,
expected_pkey_fault(pkey);
}
+void test_write_of_write_disabled_region_with_page_already_mapped(int *ptr,
+ u16 pkey)
+{
+ *ptr = __LINE__;
+ dprintf1("disabling write access; after accessing the page, "
+ "to PKEY[%02d], doing write\n", pkey);
+ pkey_write_deny(pkey);
+ *ptr = __LINE__;
+ expected_pkey_fault(pkey);
+}
+
void test_write_of_write_disabled_region(int *ptr, u16 pkey)
{
dprintf1("disabling write access to PKEY[%02d], doing write\n", pkey);
@@ -1410,6 +1421,7 @@ void (*pkey_tests[])(int *ptr, u16 pkey) = {
test_read_of_access_disabled_region,
test_read_of_access_disabled_region_with_page_already_mapped,
test_write_of_write_disabled_region,
+ test_write_of_write_disabled_region_with_page_already_mapped,
test_write_of_access_disabled_region,
test_kernel_write_of_access_disabled_region,
test_kernel_write_of_write_disabled_region,
--
2.17.1
next prev parent reply other threads:[~2020-01-30 6:38 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 6:36 [PATCH v18 00/24] selftests, powerpc, x86: Memory Protection Keys Sandipan Das
2020-01-30 6:36 ` [PATCH v18 01/24] selftests/x86/pkeys: Move selftests to arch-neutral directory Sandipan Das
2020-01-30 6:36 ` [PATCH v18 02/24] selftests/vm/pkeys: Rename all references to pkru to a generic name Sandipan Das
2020-01-30 6:36 ` [PATCH v18 03/24] selftests/vm/pkeys: Move generic definitions to header file Sandipan Das
2020-01-30 6:36 ` [PATCH v18 04/24] selftests/vm/pkeys: Move some definitions to arch-specific header Sandipan Das
2020-01-30 6:36 ` [PATCH v18 05/24] selftests/vm/pkeys: Make gcc check arguments of sigsafe_printf() Sandipan Das
2020-01-30 6:36 ` [PATCH v18 06/24] selftests: vm: pkeys: Use sane types for pkey register Sandipan Das
2020-01-30 6:36 ` [PATCH v18 07/24] selftests: vm: pkeys: Add helpers for pkey bits Sandipan Das
2020-01-30 6:36 ` [PATCH v18 08/24] selftests/vm/pkeys: Fix pkey_disable_clear() Sandipan Das
2020-01-30 6:36 ` [PATCH v18 09/24] selftests/vm/pkeys: Fix assertion in pkey_disable_set/clear() Sandipan Das
2020-01-30 6:36 ` [PATCH v18 10/24] selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random Sandipan Das
2020-01-30 6:36 ` [PATCH v18 11/24] selftests: vm: pkeys: Use the correct huge page size Sandipan Das
2020-01-30 6:36 ` [PATCH v18 12/24] selftests/vm/pkeys: Introduce generic pkey abstractions Sandipan Das
2020-01-30 6:36 ` [PATCH v18 13/24] selftests/vm/pkeys: Introduce powerpc support Sandipan Das
2020-01-30 6:36 ` [PATCH v18 14/24] selftests/vm/pkeys: Fix number of reserved powerpc pkeys Sandipan Das
2020-01-30 6:36 ` [PATCH v18 15/24] selftests/vm/pkeys: Fix assertion in test_pkey_alloc_exhaust() Sandipan Das
2020-01-30 6:36 ` [PATCH v18 16/24] selftests/vm/pkeys: Improve checks to determine pkey support Sandipan Das
2020-01-30 6:36 ` [PATCH v18 17/24] selftests/vm/pkeys: Associate key on a mapped page and detect access violation Sandipan Das
2020-01-30 6:37 ` Sandipan Das [this message]
2020-01-30 6:37 ` [PATCH v18 19/24] selftests/vm/pkeys: Detect write violation on a mapped access-denied-key page Sandipan Das
2020-01-30 6:37 ` [PATCH v18 20/24] selftests/vm/pkeys: Introduce a sub-page allocator Sandipan Das
2020-01-30 6:37 ` [PATCH v18 21/24] selftests/vm/pkeys: Test correct behaviour of pkey-0 Sandipan Das
2020-01-30 6:37 ` [PATCH v18 22/24] selftests/vm/pkeys: Override access right definitions on powerpc Sandipan Das
2020-01-30 6:37 ` [PATCH v18 23/24] selftests: vm: pkeys: Use the correct page size " Sandipan Das
2020-01-30 6:37 ` [PATCH v18 24/24] selftests: vm: pkeys: Fix multilib builds for x86 Sandipan Das
2020-01-30 21:51 ` [PATCH v18 00/24] selftests, powerpc, x86: Memory Protection Keys Dave Hansen
2020-03-02 10:25 ` Sandipan Das
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