Re: [PATCH 0/2] Fix illegal access in IOMMU debugfs

[guanghuifeng@xxxxxxxxxxxxxxxxx]

I am very willing to participate in the upstream community feature review.

Thanks.


在 2026/3/27 16:29, Jörg Rödel 写道:
> On Thu, Mar 19, 2026 at 03:37:52PM +0800, Guanghui Feng wrote:
> > In AMD IOMMU debugfs,
> > 1. set the device, address, and other information to be accessed
> > 2. After verifying the legitimacy of the device, address, and other
> > information in step 1, access and obtain the information
> >
> > However, before actually accessing the device, invalid device or address
> > information might be set again after the legitimacy verification in step
> > 2, thus triggering an unauthorized access issue.
> >
> > Guanghui Feng (2):
> >    iommu/amd: Fix illegal device-id access in IOMMU debugfs
> >    iommu/amd: Fix illegal cap/mmio access in IOMMU debugfs
> >
> >   drivers/iommu/amd/debugfs.c | 63 ++++++++++++++++++-------------------
> >   1 file changed, 31 insertions(+), 32 deletions(-)
> Applied, thanks.
>
> Vasant, this patch-set fixes pretty serious issues. Can you please further
> review the AMD IOMMU debugfs code to make it more robust and secure?
>
> -Joerg