This bug was fixed in the package linux - 4.8.0-30.32
---------------
linux (4.8.0-30.32) yakkety; urgency=low
* CVE-2016-8655 (LP: #1646318)
- packet: fix race condition in packet_set_ring
-- Brad Figg <brad.f...@canonical.com> Thu, 01 Dec 2016 08:02:53 -0800
** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-8655
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https://bugs.launchpad.net/bugs/1632049
Title:
PSL data cache should be flushed before resetting CAPI adapter
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Yakkety:
Fix Released
Bug description:
---Problem Description---
The PSL data cache should be flushed before resetting a CAPI adapter.
If the PSL data cache holds dirty cache line when it is reset, the host
trying to access that memory when the link is down may face a Uncorrectable
Error (UE), forcing a reboot of the system.
---uname output---
Linux freak 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:40:06 UTC 2016
ppc64le ppc64le ppc64le GNU/Linux
---Additional Hardware Info---
CAPI adapter needed + AFU image using the PSL cache (e.g. afu_directed
memcpy)
Machine Type = Tuleta
---Steps to Reproduce---
There's some randomness to it, but triggering a memcpy test + card reset in
a loop can produce it:
memcpy_afu_ctx -p100 -l1000
echo 1 > /sys/class/cxl/card0/reset
Fix is already upstream under commit ID:
aaa2245ed836824f21f8e42e0ab63b1637d1cb20
"cxl: Flush PSL cache before resetting the adapter"
We would like the fix released for both 16.04 and 16.10 please.
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