This bug was fixed in the package debian-installer - 20101020ubuntu543.4

---------------
debian-installer (20101020ubuntu543.4) bionic; urgency=medium

  * build/pkg-lists/base: add ca-certificates-udeb to enable HTTPS
    without d-i/allow_unauthenticated_ssl in stock initramfs image
    as in Debian. (LP: #1807023)

 -- Mauricio Faria de Oliveira <m...@canonical.com>  Mon, 26 Nov 2018
16:49:46 -0200

** Changed in: debian-installer (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1789227

Title:
  nvme devices namespace assigned to the wrong controller

Status in debian-installer package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in debian-installer source package in Bionic:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  == Impact ==

  During device discovery, when multipath is disabled, nvme multipath
  module will very likely think that the name space on one nvme
  controller belongs to the other controller.

  
  == Fix ==

  Commit a785dbccd95c37606c720580714f5a7a8b3255f1 upstream

  From: Keith Busch <keith.bu...@intel.com>

  When CONFIG_NVME_MULTIPATH is set, but we're not using nvme to multipath,
  namespaces with multiple paths were not creating unique names due to
  reusing the same instance number from the namespace's head.

  This patch fixes this by falling back to the non-multipath naming method
  when the parameter disabled using multipath.

  Reported-by: Mike Snitzer <snit...@redhat.com>
  Signed-off-by: Keith Busch <keith.bu...@intel.com>
  Reviewed-by: Christoph Hellwig <h...@lst.de>
  Signed-off-by: Jens Axboe <ax...@kernel.dk>

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