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(parent: af4b8b9) | patch
KVM: emulator: more strict rsm checks.
authorMaxim Levitsky <mlevitsk@redhat.com>
Thu, 27 Aug 2020 17:11:44 +0000 (20:11 +0300)
committerPaolo Bonzini <pbonzini@redhat.com>
Sat, 12 Sep 2020 16:22:55 +0000 (12:22 -0400)
commitf330662d511c79606d9c2a1114ee571e1ab2aff4
tree67f132e53a670820276243ba7238aba555ae8484tree | snapshot
parentaf4b8b99f1fc3e7f2b573f8ef48fd8d34f901131commit | diff
KVM: emulator: more strict rsm checks.

Don't ignore return values in rsm_load_state_64/32 to avoid
loading invalid state from SMM state area if it was tampered with
by the guest.

This is primarly intended to avoid letting guest set bits in EFER
(like EFER.SVME when nesting is disabled) by manipulating SMM save area.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827171145.374620-8-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/emulate.c diff | blob | history
Linux Kernel Source Tree.