On 30/09/2019 14:32, Roger Pau Monne wrote:
> diff --git a/xen/include/asm-x86/hvm/ioreq.h b/xen/include/asm-x86/hvm/ioreq.h
> index 65491c48d2..c3917aa74d 100644
> --- a/xen/include/asm-x86/hvm/ioreq.h
> +++ b/xen/include/asm-x86/hvm/ioreq.h
> @@ -54,6 +54,12 @@ unsigned int hvm_broadcast_ioreq(ioreq_t *p, bool
> buffered);
>
> void hvm_ioreq_init(struct domain *d);
>
> +static inline bool hvm_ioreq_is_internal(unsigned int id)
> +{
> + ASSERT(id < MAX_NR_IOREQ_SERVERS);
> + return id >= MAX_NR_EXTERNAL_IOREQ_SERVERS;
You cannot ASSERT() here. id is guest-controlled data in the dm_op() path.
~Andrew
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