KVM: x86/mmu: Use 64-bit address to invalidate to fix a subtle bug

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FNAME(invlpg)() and kvm_mmu_invalidate_gva() take a gva_t, i.e. unsigned
long, as the type of the address to invalidate.  On 32-bit kernels, the
upper 32 bits of the GPA will get dropped when an L2 GPA address is
invalidated in the shadowed nested TDP MMU.

Convert it to u64 to fix the problem.

Reported-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Link: https://lore.kernel.org/r/20230216154115.710033-2-jiangshanlai@gmail.com
[sean: tweak changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Lai Jiangshan 2023-02-16 23:41:07 +08:00 • committed by Sean Christopherson

parent d8708b80fa

commit 753b43c9d1

4 changed files with 17 additions and 16 deletions

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6

arch/x86/include/asm/kvm_host.h

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16

arch/x86/kvm/mmu/mmu.c

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7

arch/x86/kvm/mmu/paging_tmpl.h

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4

arch/x86/kvm/x86.c

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