33 lines
1 KiB
Diff
33 lines
1 KiB
Diff
From 6d83f3690f8f3026df587db2264f0917ba747de9 Mon Sep 17 00:00:00 2001
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From: Maxim Levitsky <mlevitsk@redhat.com>
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Date: Tue, 25 Oct 2022 15:47:30 +0300
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Subject: [PATCH] KVM: x86: emulator: update the emulation mode after rsm
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Update the emulation mode after RSM so that RIP will be correctly
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written back, because the RSM instruction can switch the CPU mode from
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32 bit (or less) to 64 bit.
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This fixes a guest crash in case the #SMI is received while the guest
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runs a code from an address > 32 bit.
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Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
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---
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arch/x86/kvm/emulate.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
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index d75d33d60cb8..4365137d823b 100644
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--- a/arch/x86/kvm/emulate.c
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+++ b/arch/x86/kvm/emulate.c
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@@ -2313,7 +2313,7 @@ static int em_rsm(struct x86_emulate_ctxt *ctxt)
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if (ctxt->ops->leave_smm(ctxt))
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ctxt->ops->triple_fault(ctxt);
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- return X86EMUL_CONTINUE;
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+ return emulator_recalc_and_set_mode(ctxt);
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}
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static void
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--
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2.38.1
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