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[Bug 1552788] [NEW] network lost after large number of reboots


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---Problem Description---
network lost after large number of reboots (>500)
Contact Information = pschmidt@xxxxxxxxxx 
---uname output---
Linux s8330025 4.4.0-2-generic #16-Ubuntu SMP Thu Jan 28 15:44:18 UTC 2016 s390x s390x s390x GNU/Linux
Machine Type = s390 z/VM Guest 
---Steps to Reproduce---
 reboot z/VM guest several times >500. After a large number of reboots the network interfaces doesn't come up any more. The z/VM guest boots fine, unless the missing network. Impossible to bring up network again manually.


Further debug shows that it is the "ip link set enccw0.0.f5f0 up" that
is failing with "RTNETLINK answers: Operation not permitted".  Looking
for further debug assistance in determining why the CAP_NET_ADMIN check
for the root user running ip might be failing.

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Skipper Bug Screeners (skipper-screen-team)
         Status: New

** Tags: architecture-s39064 bot-comment bugnameltc-136706 severity-high targetmilestone-inin1604
network lost after large number of reboots
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