** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

** Tags removed: verification-needed-cosmic
** Tags added: verification-done-cosmic

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem in Ubuntu.
https://bugs.launchpad.net/bugs/1820990

Title:
  [SRU][B/B-OEM/C/D] Fix AMD IOMMU NULL dereference

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Fix Committed
Status in linux-oem package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  Fix Committed
Status in linux-oem source package in Bionic:
  Fix Committed
Status in linux source package in Cosmic:
  Fix Committed
Status in linux-oem source package in Cosmic:
  Invalid
Status in linux source package in Disco:
  Fix Committed
Status in linux-oem source package in Disco:
  Invalid

Bug description:
  [Impact]
  When no acpi hid match the device, there will be a NULL dereference in amd 
iommu.
  It will make system hang.

  [Fix]
  Check NULL pointer before using it.

  [Test]
  Tested on several AMD platforms, bugs are fixed with this patch.

  [Regression Potential]
  Low, upstream fix, Verified on several platforms.
  It should be safe.

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