group.of.nepali.translators team mailing list archive

[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1681469

Title:
  Potential memory corruption with capi adapters

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed
Status in linux source package in Artful:
  Fix Released

Bug description:
  == Comment: #0 - Frederic Barrat <frederic.barrat@xxxxxxxxxx> -
  2017-04-10 04:44:01 ==

  ---Problem Description---
  Memory corruption can be seen when using a capi adapter. It can happen if the host process allocates/frees/reallocates memory areas used by the the capi adapter.
  Some TLB invalidations may not be propagated to the capi adapter, causing the corruption.
   
  Contact Information = frederic.barrat@xxxxxxxxxx 
   
  ---uname output---
  Linux garri 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:05:15 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  capi card needed, with the AFU image used by libdonut development  

   
  Machine Type = Tuleta 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Run libdonut in a loop, until corruption is seen. Host process will dump core
   
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Info:
    The system is not configured to capture a system dump.
   
  *Additional Instructions for frederic.barrat@xxxxxxxxxx: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Frederic Barrat <frederic.barrat@xxxxxxxxxx> - 2017-04-10 04:45:19 ==
  Fix is already upstream:

  commit 88b1bf7268f56887ca88eb09c6fb0f4fc970121a
  Author: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx>
  Date:   Wed Mar 29 19:19:42 2017 +0200

      powerpc/mm: Add missing global TLB invalidate if cxl is active


  Could it be backported to the 16.04 LTS release, as well as 17.04?
  Thanks

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