On 21/12/2016 10:41, Dmitry Vyukov wrote: > Hello, > > I am getting some KVM_EXIT_INTERNAL_ERROR/KVM_INTERNAL_ERROR_EMULATION > while fuzzing KVM. Does it indicate a bug in kvm code? No, it just indicates something that isn't implemented. Other KVM_EXIT_INTERNAL_ERROR cases indicate a bug in the userspace code. If you're running nested virtualization and the nested guest manages to kill the host, that's bad. Otherwise, they're harmless. Paolo > To make it clear, the context is that guest does all kind of weird > stuff and if it kills itself it is fine. I am just trying to catch bad > effects on the host. > As far as I can tell, if qemu gets KVM_EXIT_INTERNAL_ERROR it will > fail. So for user it will look like qemu misbehaves. E.g. it will not > auto restart the VM. > If KVM_EXIT_INTERNAL_ERROR/KVM_INTERNAL_ERROR_EMULATION is OK, are > other KVM_EXIT_INTERNAL_ERROR error codes worse? Are there any other > indications that host is affected in a bad way? I mean besides BUGs, > WARNINGs and crashes of the host kernel. > > Thanks > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
