From: Eric Auger eric.auger@redhat.com
mainline inclusion from mainline-5.3 commit 3855ba2d834d category: bugfix bugzilla: 17414 CVE: NA
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In the case the RMRR device scope is a PCI-PCI bridge, let's check the device belongs to the PCI sub-hierarchy.
Fixes: 0659b8dc45a6 ("iommu/vt-d: Implement reserved region get/put callbacks")
Signed-off-by: Eric Auger eric.auger@redhat.com Reviewed-by: Lu Baolu baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Xiongfeng Wang wangxiongfeng2@huawei.com Reviewed-by: Hanjun Guo guohanjun@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c3b79aaf12b79..761185ac12c5e 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5284,7 +5284,8 @@ static void intel_iommu_get_resv_regions(struct device *device, struct iommu_resv_region *resv; size_t length;
- if (i_dev != device) + if (i_dev != device && + !is_downstream_to_pci_bridge(device, i_dev)) continue;
length = rmrr->end_address - rmrr->base_address + 1;