KVM: MMU: fix smap permission check

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commit 7cbeed9bce upstream.

Current permission check assumes that RSVD bit in PFEC is always zero,
however, it is not true since MMIO #PF will use it to quickly identify
MMIO access

Fix it by clearing the bit if walking guest page table is needed

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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Xiao Guangrong 2015-05-07 16:20:15 +08:00 • committed by Luis Henriques

parent aa56fe42fa

commit b577fcb3bf

2 changed files with 9 additions and 0 deletions

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2

arch/x86/kvm/mmu.h

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7

arch/x86/kvm/paging_tmpl.h

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