[dpdk-dev] [PATCH v1] ethdev: fix multi-process NULL dereference crashes

[Thomas Monjalon]

2017-01-24 08:16, Remy Horton:
> 
> On 20/01/2017 18:37, Thomas Monjalon wrote:
> [..]
> > 3 comments here:
> > - it is in the wrong section (EAL instead of Drivers)
> > - secondary processes can setup a vdev PMD
> > - before Yuanhan's patch, even PCI PMD were blanking primary process data
> 
> Since the code being changed is in rte_ether rather than drivers/net it 
> seemed the logical place to me.. :)

The change is in ethdev, and you put the release note in EAL.
So no, it is not logical, because ethdev is not EAL.

> > I propose this rebase:
> >
> > -       memset(&rte_eth_dev_data[port_id], 0, sizeof(struct rte_eth_dev_data));
> >         eth_dev = eth_dev_get(port_id);
> > +       if (rte_eal_process_type() == RTE_PROC_PRIMARY)
> > +               memset(eth_dev->data, 0, sizeof(*eth_dev->data));
> >         snprintf(eth_dev->data->name, sizeof(eth_dev->data->name), "%s", name);
> >         eth_dev->data->port_id = port_id;
> >         eth_dev->data->mtu = ETHER_MTU;
> 
> Seems OK to me, assuming Yuanhan's patch is going in as-is.

Yuanhan's patch is already part of RC1.