summaryrefslogtreecommitdiff
path: root/samples/kobject
diff options
context:
space:
mode:
authorPunit Agrawal <punit.agrawal@arm.com>2018-01-04 21:24:33 +0300
committerChristoffer Dall <christoffer.dall@linaro.org>2018-01-11 17:25:57 +0300
commitc507babf10ead4d5c8cca704539b170752a8ac84 (patch)
treeb2ca66e0864bf52c92e25495ffdde6554c7f366e /samples/kobject
parent0eb7c33cadf6b2f1a94e58ded8b0eb89b4eba382 (diff)
downloadlinux-c507babf10ead4d5c8cca704539b170752a8ac84.tar.xz
KVM: arm/arm64: Check pagesize when allocating a hugepage at Stage 2
KVM only supports PMD hugepages at stage 2 but doesn't actually check that the provided hugepage memory pagesize is PMD_SIZE before populating stage 2 entries. In cases where the backing hugepage size is smaller than PMD_SIZE (such as when using contiguous hugepages), KVM can end up creating stage 2 mappings that extend beyond the supplied memory. Fix this by checking for the pagesize of userspace vma before creating PMD hugepage at stage 2. Fixes: 66b3923a1a0f77a ("arm64: hugetlb: add support for PTE contiguous bit") Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <stable@vger.kernel.org> # v4.5+ Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'samples/kobject')
0 files changed, 0 insertions, 0 deletions