ping.... On 2015/7/29 19:03, Rui Xiang wrote: > Hi Zefan, Suresh or Peter, > > 9c1c3fac53378c9782c18f80107965578d7b7167 > x86, kvm: use kernel_fpu_begin/end() in kvm_load/put_guest_fpu() > > We never cause the "Device Not Available" exception in kernel mode, > but without this patch, the orign unlazy_fpu() do stts(), the following > fpu_restore_checking() will trigger a DNA(Device Not Available), this > may corrupt the user process fpu. And an crash happened through a fault > injection in our scenario. > > b1a74bf8212367be2b1d6685c11a84e056eaaaf1 > x86, kvm: fix kvm's usage of kernel_fpu_begin/end() > > The commit b1a74bf82123 fix a bug introduced by comit 9c1c3fac5337 > (x86, kvm: use kernel_fpu_begin/end() in kvm_load/put_guest_fpu()) > > They look applicable to stable-3.4.y. The first one can be applied > cleanly, the other need some adjustments to backport. > The following patche is the backport for b1a74bf82123. > > And what do you think? > > 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
