From: linuxram@us.ibm.com (Ram Pai)
Subject: [Linux-kselftest-mirror] [PATCH v10 17/24] selftests/vm: associate key on a mapped page and detect access violation
Date: Mon, 22 Jan 2018 10:52:10 -0800 [thread overview]
Message-ID: <1516647137-11174-18-git-send-email-linuxram@us.ibm.com> (raw)
Message-ID: <20180122185210.Hlm5700Yn7tJiZc25kroBzkuvsUyPvy-xxr3tRKaqdE@z> (raw)
In-Reply-To: <1516647137-11174-1-git-send-email-linuxram@us.ibm.com>
detect access-violation on a page to which access-disabled
key is associated much after the page is mapped.
Signed-off-by: Ram Pai <linuxram at us.ibm.com>
---
tools/testing/selftests/vm/protection_keys.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
index 33d5839..1d3f596 100644
--- a/tools/testing/selftests/vm/protection_keys.c
+++ b/tools/testing/selftests/vm/protection_keys.c
@@ -1016,6 +1016,24 @@ void test_read_of_access_disabled_region(int *ptr, u16 pkey)
dprintf1("*ptr: %d\n", ptr_contents);
expected_pkey_fault(pkey);
}
+
+void test_read_of_access_disabled_region_with_page_already_mapped(int *ptr,
+ u16 pkey)
+{
+ int ptr_contents;
+
+ dprintf1("disabling access to PKEY[%02d], doing read @ %p\n",
+ pkey, ptr);
+ ptr_contents = read_ptr(ptr);
+ dprintf1("reading ptr before disabling the read : %d\n",
+ ptr_contents);
+ rdpkey_reg();
+ pkey_access_deny(pkey);
+ ptr_contents = read_ptr(ptr);
+ dprintf1("*ptr: %d\n", ptr_contents);
+ 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);
@@ -1310,6 +1328,7 @@ void test_mprotect_pkey_on_unsupported_cpu(int *ptr, u16 pkey)
void (*pkey_tests[])(int *ptr, u16 pkey) = {
test_read_of_write_disabled_region,
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_access_disabled_region,
test_kernel_write_of_access_disabled_region,
--
1.7.1
--
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next prev parent reply other threads:[~2018-01-22 18:52 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-22 18:51 [Linux-kselftest-mirror] [PATCH v10 00/24] selftests, powerpc, x86 : Memory Protection Keys linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 01/24] selftests/x86: Move protecton key selftest to arch neutral directory linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 02/24] selftests/vm: rename all references to pkru to a generic name linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 03/24] selftests/vm: move generic definitions to header file linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 04/24] selftests/vm: typecast the pkey register linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 05/24] selftests/vm: generic function to handle shadow key register linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:51 ` [Linux-kselftest-mirror] [PATCH v10 06/24] selftests/vm: fix the wrong assert in pkey_disable_set() linuxram
2018-01-22 18:51 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 07/24] selftests/vm: fixed bugs in pkey_disable_clear() linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 08/24] selftests/vm: clear the bits in shadow reg when a pkey is freed linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 09/24] selftests/vm: fix alloc_random_pkey() to make it really random linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 10/24] selftests/vm: introduce two arch independent abstraction linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 11/24] selftests/vm: pkey register should match shadow pkey linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 12/24] selftests/vm: generic cleanup linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 13/24] selftests/vm: powerpc implementation for generic abstraction linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 14/24] selftests/vm: clear the bits in shadow reg when a pkey is freed linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 15/24] selftests/vm: powerpc implementation to check support for pkey linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 16/24] selftests/vm: fix an assertion in test_pkey_alloc_exhaust() linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` linuxram [this message]
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 17/24] selftests/vm: associate key on a mapped page and detect access violation Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 18/24] selftests/vm: associate key on a mapped page and detect write violation linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 19/24] selftests/vm: detect write violation on a mapped access-denied-key page linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 20/24] selftests/vm: testcases must restore pkey-permissions linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 21/24] selftests/vm: sub-page allocator linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 22/24] selftests/vm: Fix deadlock in protection_keys.c linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 23/24] selftests/powerpc: Add ptrace tests for Protection Key register linuxram
2018-01-22 18:52 ` Ram Pai
2018-01-22 18:52 ` [Linux-kselftest-mirror] [PATCH v10 24/24] selftests/powerpc: Add core file test " linuxram
2018-01-22 18:52 ` Ram Pai
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