tree 4921c8e0a0f52f81ff0c45834b939aa5be9af5a6
parent 44bde61428f7719c54a2074443edddf0e827296c
author Jiang Liu <jiang.liu@linux.intel.com> 1405059570 +0800
committer Joerg Roedel <jroedel@suse.de> 1406124287 +0200

iommu/vt-d: Fix possible invalid memory access caused by free_dmar_iommu()

Static identity and virtual machine domains may be cached in
iommu->domain_ids array after corresponding IOMMUs have been removed
from domain->iommu_bmp. So we should check domain->iommu_bmp before
decreasing domain->iommu_count in function free_dmar_iommu(), otherwise
it may cause free of inuse domain data structure.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>