diff options
| author |   Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-12-04 07:49:11 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-12-22 22:28:35 +1100 |
| commit | f72a85e347810c76eb246e68751233aad3b84ac8 (patch) | |
| tree | 8078274e912b95aecaa819848cb6a066896e2073 /scripts | |
| parent | powerpc/mm/hugetlb: Use pte_access_permitted for hugetlb access check (diff) | |
powerpc/mm/book3s/64: Add proper pte access check helper
pte_access_premitted get called in get_user_pages_fast path. If we
have marked the pte PROT_NONE, we should not allow a read access on
the address. With the current implementation we are not checking the
READ and only check for WRITE. This is needed on archs like ppc64 that
implement PROT_NONE using RWX access instead of _PAGE_PRESENT. Also
add pte_user check just to make sure we are not accessing kernel
mapping.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions