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KVM: x86: reset pdptrs_from_userspace when exiting smm
authorMaxim Levitsky <mlevitsk@redhat.com>
Mon, 13 Sep 2021 14:09:50 +0000 (17:09 +0300)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 22 Sep 2021 14:33:16 +0000 (10:33 -0400)
commit37687c403a641f251cb2ef2e7830b88aa0647ba9
treee38f1ba8c0b441699b83c47843eae19164b65f78tree | snapshot
parente2e6e449d68ddf4ccb0bf72cc50fbc6c69fe7f63commit | diff
KVM: x86: reset pdptrs_from_userspace when exiting smm

When exiting SMM, pdpts are loaded again from the guest memory.

This fixes a theoretical bug, when exit from SMM triggers entry to the
nested guest which re-uses some of the migration
code which uses this flag as a workaround for a legacy userspace.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210913140954.165665-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c diff | blob | history
https://github.com/torvalds/linux.git