This bug was fixed in the package multipath-tools - 0.4.9-3ubuntu7.11

---------------
multipath-tools (0.4.9-3ubuntu7.11) trusty; urgency=medium

  * debian/patches/series: add dm-multipath-backlist-nvme-5c412e47.patch to
    the series file; it was missing in the previous upload and thus the patch
    intending to fix bug 1551828 was not applied. (LP: #1551828)

multipath-tools (0.4.9-3ubuntu7.10) trusty; urgency=medium

  [ Mathieu Trudel-Lapierre ]
  * debian/patches/dm-multipath-backlist-nvme-5c412e47.patch: blacklist NVMe
    from multipath, otherwise kpartx calls will hang. This is because mpath
    works at the request level (which NVMe bypasses), so multipathing is not
    supported on NVMe. (LP: #1551828)

  [ Mauricio Faria de Oliveira ]
  * Remove partition device nodes of individual paths (for LVM on multipath)
    (LP: #1540401)
    - debian/multipath-tools.dm-mpath-lvm.udev: udev rule for that.
    - debian/initramfs/hooks: copy the udev rule and partx to the initramfs.
    - debian/initramfs/init-top: load dm-multipath module for 'multipath -c'.
    - debian/rules: install the udev rule and init-top.

 -- Mathieu Trudel-Lapierre <[email protected]>  Mon, 21 Mar 2016
10:41:36 -0400

** Changed in: multipath-tools (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1551828

Title:
  kpartx causes kernel oops when NVMe devices is not in blacklist

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