Public bug reported:

After creating a bcache cache device with an 8k block size (see
#1662407), a kernel oops happens every time device is probed.

I'm not sure that there is any userspace bug present in #1662407 at all
- it may just be kernel. I've attached a dmesg there, but can't actually
get into the system at the moment to get apport-collect or other
diagnostics.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "DSC_0900.JPG"
   
https://bugs.launchpad.net/bugs/1809748/+attachment/5224904/+files/DSC_0900.JPG

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https://bugs.launchpad.net/bugs/1809748

Title:
  8k bcache cache NULL pointer deref on mount / can't boot

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