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| author | Lai Jiangshan <laijs@linux.alibaba.com> | 2021-09-18 03:56:27 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-23 17:28:44 +0300 |
| commit | f81602958c115fc7c87b985f71574042a20ff858 (patch) | |
| tree | d907a04c9aa0fe43ecafcdf0a6f008566b3987cc /arch/x86/crypto | |
| parent | faf6b755629627f19feafa75b32e81cd7738f12d (diff) | |
| download | linux-f81602958c115fc7c87b985f71574042a20ff858.tar.xz | |
KVM: X86: Fix missed remote tlb flush in rmap_write_protect()
When kvm->tlbs_dirty > 0, some rmaps might have been deleted
without flushing tlb remotely after kvm_sync_page(). If @gfn
was writable before and it's rmaps was deleted in kvm_sync_page(),
and if the tlb entry is still in a remote running VCPU, the @gfn
is not safely protected.
To fix the problem, kvm_sync_page() does the remote flush when
needed to avoid the problem.
Fixes: a4ee1ca4a36e ("KVM: MMU: delay flush all tlbs on sync_page path")
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210918005636.3675-2-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/crypto')
0 files changed, 0 insertions, 0 deletions