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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-27 18:55:59 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-13 19:14:59 +0300 |
| commit | fede8076aab4c2280c673492f8f7a2e87712e8b4 (patch) | |
| tree | 80aa65506194955f2383505a809dab91e83766c0 /arch/x86/kvm/emulate.c | |
| parent | c4e115f08c08cb9f3b70247b42323e40b9afd1fd (diff) | |
| download | linux-fede8076aab4c2280c673492f8f7a2e87712e8b4.tar.xz | |
KVM: x86: handle wrap around 32-bit address space
KVM is not handling the case where EIP wraps around the 32-bit address
space (that is, outside long mode). This is needed both in vmx.c
and in emulate.c. SVM with NRIPS is okay, but it can still print
an error to dmesg due to integer overflow.
Reported-by: Nick Peterson <everdox@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index bddaba9c68dd..de5476f8683e 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -5798,6 +5798,8 @@ writeback: } ctxt->eip = ctxt->_eip; + if (ctxt->mode != X86EMUL_MODE_PROT64) + ctxt->eip = (u32)ctxt->_eip; done: if (rc == X86EMUL_PROPAGATE_FAULT) { |