Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> 于2019年7月25日周四 下午3:29写道： > > From: Paolo Bonzini <pbonzini@xxxxxxxxxx> > > [ Upstream commit 88dddc11a8d6b09201b4db9d255b3394d9bc9e57 ] > > If a KVM guest is reset while running a nested guest, free_nested will > disable the shadow VMCS execution control in the vmcs01. However, > on the next KVM_RUN vmx_vcpu_run would nevertheless try to sync > the VMCS12 to the shadow VMCS which has since been freed. > > This causes a vmptrld of a NULL pointer on my machime, but Jan reports > the host to hang altogether. Let's see how much this trivial patch fixes. > > Reported-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> > Cc: Liran Alon <liran.alon@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Hi all, Do we need to backport the fix also to stable 4.14? It applies cleanly and compiles fine. Regards, Jack Wang
