group.of.nepali.translators team mailing list archive

[dann frazier <dann.frazier@xxxxxxxxxxxxx>]

Public bug reported:

[Impact]
With small segment sizes, it is possible for the driver to free an SKB before transmitting it, potentially resulting in a crash.

[Test Case]
The test case for this is to use a small MTU (200) and mount an NFS exported directory. Create several (~4) 1M files w/ dd, then copy them locally. However, I have not been able to trigger the crash myself.

[Regression Risk]
Fix is upstream, so regressions will have upstream support. Fix is limited to a driver that is only applicable to the Cavium Thunder-X SoC, so risk is negligible to other platforms.

** Affects: linux (Ubuntu)
     Importance: High
     Assignee: dann frazier (dannf)
         Status: In Progress

** Affects: linux (Ubuntu Xenial)
     Importance: High
     Assignee: dann frazier (dannf)
         Status: In Progress

** Summary changed:

- thunder: 
+ thunder: chip errata w/ multiple CQEs for a TSO packet

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => dann frazier (dannf)

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https://bugs.launchpad.net/bugs/1624569

Title:
  thunder: chip errata w/ multiple CQEs for a TSO packet

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  [Impact]
  With small segment sizes, it is possible for the driver to free an SKB before transmitting it, potentially resulting in a crash.

  [Test Case]
  The test case for this is to use a small MTU (200) and mount an NFS exported directory. Create several (~4) 1M files w/ dd, then copy them locally. However, I have not been able to trigger the crash myself.

  [Regression Risk]
  Fix is upstream, so regressions will have upstream support. Fix is limited to a driver that is only applicable to the Cavium Thunder-X SoC, so risk is negligible to other platforms.

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