On Mon, Sep 28, 2015 at 10:03:12AM -0600, Jan Beulich wrote: > >>> On 21.09.15 at 13:33, <shuai.r...@linux.intel.com> wrote: > > @@ -954,8 +975,13 @@ long arch_do_domctl( > > v->arch.xcr0_accum = _xcr0_accum; > > if ( _xcr0_accum & XSTATE_NONLAZY ) > > v->arch.nonlazy_xstate_used = 1; > > - memcpy(v->arch.xsave_area, _xsave_area, > > - evc->size - 2 * sizeof(uint64_t)); > > + if ( (cpu_has_xsaves || cpu_has_xsavec) && > > + !xsave_area_compressed(_xsave_area) ) > > Is it intended to support compact input here? Where would such > come from? And if so, don't you need to validate the input (e.g. > being a certain size)? > It is not intended to support compact input here.Just add some check here (According to Andrew suggestion).
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