Re: [Qemu-devel] [PATCH 1/2] vfio/ccw: allocate irq info with the right size

[Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>]

* Cornelia Huck <cohuck@redhat.com> [2017-07-18 10:32:13 +0200]:

> On Tue, 18 Jul 2017 03:49:25 +0200
> Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> wrote:
> 
> > From: Jing Zhang <bjzhjing@linux.vnet.ibm.com>
> > 
> > When allocating memory for the vfio_irq_info parameter of the
> > VFIO_DEVICE_GET_IRQ_INFO ioctl, we used the wrong size. Let's
> > fix it by using the right size.
> > 
> > Reviewed-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
> > Signed-off-by: Jing Zhang <bjzhjing@linux.vnet.ibm.com>
> > Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
> > ---
> >  hw/vfio/ccw.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
> > index 12d0262336..8d97b53e77 100644
> > --- a/hw/vfio/ccw.c
> > +++ b/hw/vfio/ccw.c
> > @@ -168,7 +168,7 @@ static void vfio_ccw_register_io_notifier(VFIOCCWDevice *vcdev, Error **errp)
> >          return;
> >      }
> >  
> > -    argsz = sizeof(*irq_set);
> > +    argsz = sizeof(*irq_info);
> >      irq_info = g_malloc0(argsz);
> >      irq_info->index = VFIO_CCW_IO_IRQ_INDEX;
> >      irq_info->argsz = argsz;
> 
> irq_set is larger than irq_info, but yes, let's do this correctly.
> 
> Out of curiosity, how did you spot this?
> 

I'm trying to reuse the code here, while introducing some new MMIO
regions, which you will see them some days later. ;>

-- 
Dong Jia Shi