Re: [PATCH RFC v2 00/13] IOMMUFD Generic interface

Jason Gunthorpe
2022-10-12T14:41:10Z

On Wed, Oct 12, 2022 at 09:50:53AM -0400, Steven Sistare wrote:

> > Anyhow, I think this conversation has convinced me there is no way to
> > fix VFIO_DMA_UNMAP_FLAG_VADDR. I'll send a patch reverting it due to
> > it being a security bug, basically.
>
> Please do not. Please give me the courtesy of time to develop a replacement
> before we delete it. Surely you can make progress on other opens areas of iommufd
> without needing to delete this immediately.

I'm not worried about iommufd, I'm worried about shipping kernels with
a significant security problem backed into them.

As we cannot salvage this interface it should quickly deleted so that
it doesn't cause any incidents.

It will not effect your ability to create a replacement.

Jason