Re: [dpdk-dev] [PATCH 2/2] uio: new driver to support PCI MSI-X

Vlad Zolotarov
2015-10-06T16:40:46Z

On 10/06/15 18:00, Michael S. Tsirkin wrote:
> On Tue, Oct 06, 2015 at 05:49:21PM +0300, Vlad Zolotarov wrote:
>>> and read/write the config space.
>>> This means that a single userspace bug is enough to corrupt kernel
>>> memory.
>> Could u, pls., provide and example of this simple bug? Because it's
>> absolutely not obvious...
> Stick a value that happens to match a kernel address in Msg Addr field
> in an unmasked MSI-X entry.

This patch neither configures MSI-X entries in the user space nor
provides additional means to do so therefore this "sticking" would be a
matter of some extra code that is absolutely unrelated to this patch.
So, this example seems absolutely irrelevant to this particular discussion.

thanks,
vlad

>