Re: [Xen-devel] [PATCH] IOMMU: replace ASSERT()s checking for NULL

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 07/11/16 09:24, Jan Beulich wrote:
> Avoid NULL derefs on non-debug builds.
>
> Coverity ID: 1055650
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

>
> --- a/xen/drivers/passthrough/io.c
> +++ b/xen/drivers/passthrough/io.c
> @@ -165,7 +165,11 @@ static void pt_irq_time_out(void *data)
>      spin_lock(&irq_map->dom->event_lock);
>  
>      dpci = domain_get_irq_dpci(irq_map->dom);
> -    ASSERT(dpci);
> +    if ( unlikely(!dpci) )
> +    {
> +        ASSERT_UNREACHABLE();
> +        return;
> +    }
>      list_for_each_entry ( digl, &irq_map->digl_list, list )
>      {
>          unsigned int guest_gsi = hvm_pci_intx_gsi(digl->device, digl->intx);
> @@ -793,7 +797,11 @@ void hvm_dpci_msi_eoi(struct domain *d,
>  
>  static void hvm_dirq_assist(struct domain *d, struct hvm_pirq_dpci 
> *pirq_dpci)
>  {
> -    ASSERT(d->arch.hvm_domain.irq.dpci);
> +    if ( unlikely(!d->arch.hvm_domain.irq.dpci) )
> +    {
> +        ASSERT_UNREACHABLE();
> +        return;
> +    }
>  
>      spin_lock(&d->event_lock);
>      if ( test_and_clear_bool(pirq_dpci->masked) )
>
>
>


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel