Alex Williamson a674bcab90 KVM: unmap pages from the iommu when slots are removed ... commit 32f6daad46 upstream. We've been adding new mappings, but not destroying old mappings. This can lead to a page leak as pages are pinned using get_user_pages, but only unpinned with put_page if they still exist in the memslots list on vm shutdown. A memslot that is destroyed while an iommu domain is enabled for the guest will therefore result in an elevated page reference count that is never cleared. Additionally, without this fix, the iommu is only programmed with the first translation for a gpa. This can result in peer-to-peer errors if a mapping is destroyed and replaced by a new mapping at the same gpa as the iommu will still be pointing to the original, pinned memory address. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-05-07 08:56:35 -07:00
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assigned-dev.c	KVM: Use pci_store/load_saved_state() around VM device usage	2011-05-21 12:17:10 -07:00
async_pf.c	KVM: fix the race while wakeup all pv guest	2011-01-12 11:29:03 +02:00
async_pf.h	KVM: Halt vcpu if page it tries to access is swapped out	2011-01-12 11:21:39 +02:00
coalesced_mmio.c	KVM: Update Red Hat copyrights	2010-08-01 10:35:51 +03:00
coalesced_mmio.h	KVM: Simplify coalesced mmio initialization	2010-03-01 12:35:41 -03:00
eventfd.c	Merge branch 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2011-04-07 11:33:04 -07:00
ioapic.c	KVM: ioapic: Fix an error field reference	2011-05-22 08:39:27 -04:00
ioapic.h	KVM: convert ioapic lock to spinlock	2010-05-13 01:23:55 -03:00
iodev.h	KVM: remove in_range from io devices	2009-09-10 08:33:05 +03:00
iommu.c	KVM: unmap pages from the iommu when slots are removed	2012-05-07 08:56:35 -07:00
irq_comm.c	KVM: fast-path msi injection with irqfd	2011-01-12 11:29:38 +02:00
Kconfig	KVM: Halt vcpu if page it tries to access is swapped out	2011-01-12 11:21:39 +02:00
kvm_main.c	KVM: unmap pages from the iommu when slots are removed	2012-05-07 08:56:35 -07:00