This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verification-needed-bionic' to 'verification-failed-
bionic'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
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** Tags added: verification-needed-bionic

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https://bugs.launchpad.net/bugs/1799049

Title:
  [bionic]mlx5: reading SW stats through ifstat cause kernel crash

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Committed

Bug description:
  Description of problem:
  Attempting to read SW stats (ifstat -x cpu_hit) on a system with probed VFs 
will crash the system.

  How reproducible:
  Always

  Steps to Reproduce:
  1. Create a VF
  echo 1 > /sys/bus/pci/devices/0000\:82\:00.0/sriov_numvfs

  2. read SW stats:
  ifstat -x cpu_hit

  
  Actual results:
  System will crash

  Expected results:
  No system crash

  Additional info:
  The reason for the crash is insufficient check on the helper that determines 
if a netdev is vf rep.

  will crash:
  $ ifstat -x cpu_hit 

  will not crash:
  $ ifstat -x cpu_hit $VF_REP 
  $ ifstat -x cpu_hit $UPLINK_REP

  We already have a fix for this issue, and it is accepted upstream.
  https://patchwork.ozlabs.org/patch/935193/

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