linux-kernel - [PATCH v2 0/2] iommu: Fix domain check on release (part 1/2)

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Message-Id: <20240229094613.121575-1-baolu.lu@linux.intel.com>
Date: Thu, 29 Feb 2024 17:46:11 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Kevin Tian <kevin.tian@...el.com>,
	Eric Badger <ebadger@...estorage.com>
Cc: iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 0/2] iommu: Fix domain check on release (part 1/2)

This is a follow-up to the discussion thread here:

https://lore.kernel.org/linux-iommu/20240221154012.GC13491@ziepe.ca/

It fixes a NULL pointer dereference issue in the Intel iommu driver and
strengthens the iommu core to possibly prevent similar failures in other
iommu drivers.

There are two parts of this topic:
[x] Introduce release_domain and fix a kernel NULL pointer dereference
    issue in the intel iommu driver.
[ ] A follow-up series to cleanup intel iommu driver.

Best regards,
baolu

Change log:

v2:
 - The scalable mode context entry should be removed in the release path
   as it's not part of the blocking domain.

v1: https://lore.kernel.org/linux-iommu/20240223051302.177596-1-baolu.lu@linux.intel.com/

Lu Baolu (2):
  iommu: Add static iommu_ops->release_domain
  iommu/vt-d: Fix NULL domain on device release

 include/linux/iommu.h       |  1 +
 drivers/iommu/intel/pasid.h |  1 +
 drivers/iommu/intel/iommu.c | 31 +++-----------
 drivers/iommu/intel/pasid.c | 83 +++++++++++++++++++++++++++++++++++++
 drivers/iommu/iommu.c       | 19 +++++++--
 5 files changed, 106 insertions(+), 29 deletions(-)

-- 
2.34.1