On Wed, Oct 30, 2024 at 02:34:30PM -0700, Nicolin Chen wrote:
To support driver-allocated vIOMMU objects, it's required for IOMMU driver to call the provided iommufd_viommu_alloc helper to embed the core struct. However, there is no guarantee that every driver will call it and allocate objects properly.
Make the iommufd_object_finalize/abort functions more robust to verify if the xarray slot indexed by the input obj->id is having an XA_ZERO_ENTRY, which is the reserved value stored by xa_alloc via iommufd_object_alloc.
Suggested-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com
drivers/iommu/iommufd/main.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
Reviewed-by: Jason Gunthorpe jgg@nvidia.com
Jason