[Bug 110334] New: System freeze while creating a lot of network traffic when using Intel Inference Engine with OpenCL

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110334

            Bug ID: 110334
           Summary: System freeze while creating a lot of network traffic
                    when using Intel Inference Engine with OpenCL
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: t.senfter at accessio.at
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 143875
  --> https://bugs.freedesktop.org/attachment.cgi?id=143875&action=edit
additional information and alternative scripts for the zombie Docker image

We observe a "zombie" mode when running CNNs using the Intel Inference Engine
with OpenCL. In this "zombie" mode the system does not react to anything
(nothing when pressing Power OFF (except for 5 seconds obviously) and no
reaction to Magic SysRq key), but it creates a lot of network traffic (enough
to take down a 100Mbit switch). More details can be found here:
https://software.intel.com/en-us/comment/1933685#comment-1933685

Affected hardware:
 - NUC7BNH with Intel i3-7100U
 - NUC7DNH with Intel i7-7567U
 - NUC8BEH with either Intel i3-8109U or Intel i5-8259U

Affected kernels:
 - 4.7.0.intel.r5.0-1
 - 4.15.18-041518-generic
 - 4.19.31-041931-generic

There is not much to be found in the logs (syslog and kern.log from boot to
freeze are attached).

The problem occurs randomly and not very frequent with our software (with about
10 systems running we get the freeze maybe once a week). However we could
create a Docker image which triggers the problem usually within a few minutes
on kernel 4.7.0.intel.r5.0-1. 
The Docker image can be found here: https://hub.docker.com/r/accessio/zombie
An archive with additional information and alternative scripts is attached.

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