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[for-4.15,v3,0/3] xen/iommu: Collection of bug fixes for IOMMU teadorwn

Message ID 20210217142458.3769-1-julien@xen.org (mailing list archive)
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Series xen/iommu: Collection of bug fixes for IOMMU teadorwn | expand

Message

Julien Grall Feb. 17, 2021, 2:24 p.m. UTC 
From: Julien Grall <jgrall@amazon.com>

Hi all,

This series is a collection of bug fixes for the IOMMU teardown code.
All of them are candidate for 4.15 as they can either leak memory or
lead to host crash/host corruption.

This is sent directly on xen-devel because all the issues were either
introduced in 4.15 or happen in the domain creation code.

Major changes since v2:
    - patch #1 "xen/x86: p2m: Don't map the special pages in the IOMMU
    page-tables" has been removed. This requires Jan's patch [2] to
    fully mitigate memory leaks.

Cheers,

[1] https://lore.kernel.org/xen-devel/1b6a411b-84e7-bfb1-647e-511a13df838c@suse.com

Julien Grall (3):
  xen/iommu: x86: Clear the root page-table before freeing the
    page-tables
  xen/x86: iommu: Ignore IOMMU mapping requests when a domain is dying
  xen/iommu: x86: Harden the IOMMU page-table allocator

 xen/drivers/passthrough/amd/iommu_map.c     | 13 ++++++
 xen/drivers/passthrough/amd/pci_amd_iommu.c | 12 +++++-
 xen/drivers/passthrough/vtd/iommu.c         | 25 +++++++++++-
 xen/drivers/passthrough/x86/iommu.c         | 45 ++++++++++++++++++++-
 xen/include/xen/iommu.h                     |  1 +
 5 files changed, 93 insertions(+), 3 deletions(-)