KVM: x86 emulator: fix memory access during x86 emulation

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Currently when x86 emulator needs to access memory, page walk is done with
broadest permission possible, so if emulated instruction was executed
by userspace process it can still access kernel memory. Fix that by
providing correct memory access to page walker during emulation.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>

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Gleb Natapov 2010-02-10 14:21:32 +02:00 • committed by Marcelo Tosatti

parent a004475567

commit 1871c6020d

7 changed files with 142 additions and 50 deletions

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14

arch/x86/include/asm/kvm_emulate.h

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7

arch/x86/include/asm/kvm_host.h

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6

arch/x86/kvm/emulate.c

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17

arch/x86/kvm/mmu.c

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6

arch/x86/kvm/mmu.h

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11

arch/x86/kvm/paging_tmpl.h

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131

arch/x86/kvm/x86.c

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