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[Launchpad Bug Tracker <1632116@xxxxxxxxxxxxxxxxxx>]

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.figg@xxxxxxxxxxxxx>  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/1632116

Title:
  Paths not failed properly when unmapping virtual FC ports in VIOS
  (using ibmvfc)

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---
  vios vfc unmap (vfcmap -vadapter vfchost0 -fcp) can result in no i/o being retried nor device offline.
    
  ---uname output---
  Linux ubuntu16 4.4.0-9136-generic #55-Ubuntu SMP Fri Aug 26 05:56:24 UTC 2016 ppc64le ppc64le ppc64le GNU/Linux
   
  Machine Type = Power8 LPAR 
   
  ---Steps to Reproduce---
   Ubuntu 16.10 lpar with two vfc adapters mapped to SAN Storage and configured with mulitpath.
  In vios do:  vfcmap -vadapter vfchost0 -fcp (where vfchost0 maps to test lpar).  multipath -ll and lvm commands hang in linux lpar.  tail /var/log/message hangs sometimes. multipath doesn't see failing devices and doesn't mark paths down.

  
  Fyi ...
  .... the following patch fixes the problem, which is now upstream accepted in the scsi tree as
  http://git.kernel.org/cgit/linux/kernel/git/mkp/scsi.git/commit/?h=for-next&id=07d0e9a847401ffd2f09bd450d41644cd090e81d
  ("scsi: ibmvfc: Fix I/O hang when port is not mapped")

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