From: Jiang Liu <jiang.liu@linux.intel.com>
Date: Fri, 11 Jul 2014 06:19:30 +0000 (+0800)
Subject: iommu/vt-d: Fix possible invalid memory access caused by free_dmar_iommu()
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~158^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a46ddf77c32da1f4137aeb902bc4e1f50582b69;p=pandora-kernel.git

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>
---

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