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[Bug 1438039] Re: Ubuntu14.04.1 kernel panics with enic driver throwing a NULL Pointer exception


I tried to perform a cherry-pick of 4cfe87853.  However, it looks like
it will also need the following commits backported or cherry-picked:


I'll try to build a test kernel with these commits, but it may be too
many changes for an SRU.

In the mean time, can you test the LTS-backport-vivid kernel for Trusty?
This is the kernel that comes with 14.04.3.  It can be install with:

sudo apt-get install linux-generic-lts-vivid

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  Ubuntu14.04.1 kernel panics with   enic driver throwing a NULL Pointer

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
Status in linux source package in Utopic:
Status in linux source package in Vivid:
  Fix Released

Bug description:
  Steps to reproduce the bug:
  1. Install Ubuntu 14.04.1 on the Cisco M-series server.
  2. Run reboot test, OS will come up and go for graceful reboot continuously.
  3. I am seeing kernel panic in 3 out of 4 Ubuntu machines . Don't know after how many iterations of reboot it happened. I checked the server 6 hours after starting the reboot test.
  4. Don't know whether this panic is happening while the OS was booting or while going for reboot.

  The bug has been root caused to the enic driver and a fix has been posted upstream.
  Please find below the details of the patch submitted upstream.

  4cfe878537cec0e9c0f84b93cc6aa9526f6942b5 enic: do tx cleanup in napi

  This bug is submitted for the patch to be pulled in from upstream to
  Ubuntu's releases.

  break-fix: - 4cfe878537cec0e9c0f84b93cc6aa9526f6942b5

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