From: Dave Hansen <dave.hansen@intel.com>
To: Ram Pai <linuxram@us.ibm.com>,
shuahkh@osg.samsung.com, linux-kselftest@vger.kernel.org
Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org,
linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org,
mingo@redhat.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com,
fweimer@redhat.com, msuchanek@suse.de,
aneesh.kumar@linux.vnet.ibm.com
Subject: Re: [PATCH v13 19/24] selftests/vm: associate key on a mapped page and detect access violation
Date: Wed, 20 Jun 2018 08:16:44 -0700 [thread overview]
Message-ID: <048b1de9-85f8-22ff-a31a-b06a382769bb@intel.com> (raw)
In-Reply-To: <1528937115-10132-20-git-send-email-linuxram@us.ibm.com>
On 06/13/2018 05:45 PM, Ram Pai wrote:
> +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);
> + read_pkey_reg();
> + pkey_access_deny(pkey);
> + ptr_contents = read_ptr(ptr);
> + dprintf1("*ptr: %d\n", ptr_contents);
> + expected_pkey_fault(pkey);
> +}
Looks fine to me. I'm a bit surprised we didn't do this already, which
is a good thing for this patch.
FWIW, if you took patches like this and put them first, you could
probably get it merged now. Yes, I know it would mean redoing some of
the later code move and rename ones.
next prev parent reply other threads:[~2018-06-20 15:17 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-14 0:44 [PATCH v13 00/24] selftests, powerpc, x86 : Memory Protection Keys Ram Pai
2018-06-14 0:44 ` [PATCH v13 01/24] selftests/x86: Move protecton key selftest to arch neutral directory Ram Pai
2018-06-14 0:44 ` [PATCH v13 02/24] selftests/vm: rename all references to pkru to a generic name Ram Pai
2018-06-14 0:44 ` [PATCH v13 03/24] selftests/vm: move generic definitions to header file Ram Pai
2018-06-14 0:44 ` [PATCH v13 04/24] selftests/vm: move arch-specific definitions to arch-specific header Ram Pai
2018-06-14 0:44 ` [PATCH v13 05/24] selftests/vm: Make gcc check arguments of sigsafe_printf() Ram Pai
2018-06-14 0:44 ` [PATCH v13 06/24] selftests/vm: typecast the pkey register Ram Pai
2018-06-14 0:44 ` [PATCH v13 07/24] selftests/vm: generic function to handle shadow key register Ram Pai
2018-06-14 0:44 ` [PATCH v13 08/24] selftests/vm: fix the wrong assert in pkey_disable_set() Ram Pai
2018-06-20 14:47 ` Dave Hansen
2018-07-17 15:58 ` Ram Pai
2018-07-17 17:53 ` Dave Hansen
2018-06-14 0:45 ` [PATCH v13 09/24] selftests/vm: fixed bugs in pkey_disable_clear() Ram Pai
2018-06-14 0:45 ` [PATCH v13 10/24] selftests/vm: clear the bits in shadow reg when a pkey is freed Ram Pai
2018-06-20 14:49 ` Dave Hansen
2018-07-17 16:00 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 11/24] selftests/vm: fix alloc_random_pkey() to make it really random Ram Pai
2018-06-14 0:45 ` [PATCH v13 12/24] selftests/vm: introduce two arch independent abstraction Ram Pai
2018-06-14 0:45 ` [PATCH v13 13/24] selftests/vm: pkey register should match shadow pkey Ram Pai
2018-06-20 14:53 ` Dave Hansen
2018-07-17 16:02 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 14/24] selftests/vm: generic cleanup Ram Pai
2018-06-20 14:57 ` Dave Hansen
2018-06-14 0:45 ` [PATCH v13 15/24] selftests/vm: powerpc implementation for generic abstraction Ram Pai
2018-06-20 15:06 ` Dave Hansen
2018-06-14 0:45 ` [PATCH v13 16/24] selftests/vm: clear the bits in shadow reg when a pkey is freed Ram Pai
2018-06-20 15:07 ` Dave Hansen
2018-07-17 16:03 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 17/24] selftests/vm: powerpc implementation to check support for pkey Ram Pai
2018-06-20 15:09 ` Dave Hansen
2018-07-17 16:05 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 18/24] selftests/vm: fix an assertion in test_pkey_alloc_exhaust() Ram Pai
2018-06-20 15:11 ` Dave Hansen
2018-07-17 16:08 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 19/24] selftests/vm: associate key on a mapped page and detect access violation Ram Pai
2018-06-20 15:16 ` Dave Hansen [this message]
2018-07-17 16:13 ` Ram Pai
2018-07-17 17:56 ` Dave Hansen
2018-07-17 19:10 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 20/24] selftests/vm: associate key on a mapped page and detect write violation Ram Pai
2018-06-14 0:45 ` [PATCH v13 21/24] selftests/vm: detect write violation on a mapped access-denied-key page Ram Pai
2018-06-14 0:45 ` [PATCH v13 22/24] selftests/vm: testcases must restore pkey-permissions Ram Pai
2018-06-20 15:20 ` Dave Hansen
2018-07-17 16:09 ` Ram Pai
2018-06-14 0:45 ` [PATCH v13 23/24] selftests/vm: sub-page allocator Ram Pai
2018-06-14 0:45 ` [PATCH v13 24/24] selftests/vm: test correct behavior of pkey-0 Ram Pai
2018-06-20 15:22 ` Dave Hansen
2018-06-14 20:19 ` [PATCH v13 00/24] selftests, powerpc, x86 : Memory Protection Keys Florian Weimer
2018-06-15 0:58 ` Ram Pai
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