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

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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>

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Jiang Liu 2014-07-11 14:19:30 +08:00 • committed by Joerg Roedel

parent 44bde61428

commit 2a46ddf77c

1 changed files with 4 additions and 7 deletions

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drivers/iommu/intel-iommu.c

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