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

[Vlad Zolotarov]

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

>

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