** Tags added: cscc
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https://bugs.launchpad.net/bugs/1681469
Title:
Potential memory corruption with capi adapters
Status in linux package in Ubuntu:
Fix Committed
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.bar...@fr.ibm.com> -
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.bar...@fr.ibm.com
---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.bar...@fr.ibm.com:
-Attach sysctl -a output output to the bug.
== Comment: #1 - Frederic Barrat <frederic.bar...@fr.ibm.com> - 2017-04-10
04:45:19 ==
Fix is already upstream:
commit 88b1bf7268f56887ca88eb09c6fb0f4fc970121a
Author: Frederic Barrat <fbar...@linux.vnet.ibm.com>
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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