The issue here is that in LP: #1817097 e2fsprogs was changed to use 4k
blocks by default regardless of the created fs size. Changing the
command to force a 1012 byte blocksize causes the mkfs.ext2 command to
succeed:

  $ dd if=/dev/zero of=/tmp/image.ext3 bs=4096 count=20
  20+0 records in
  20+0 records out
  81920 bytes (82 kB, 80 KiB) copied, 0.00136542 s, 60.0 MB/s
  $ mkfs.ext2 -F -m 0 -N 10 /tmp/image.ext3
  mke2fs 1.45.1 (12-May-2019)
  /tmp/image.ext3: Not enough space to build proposed filesystem while setting 
up superblock
  $ mkfs.ext2 -F -m 0 -N 10 -b 1024 /tmp/image.ext3
  mke2fs 1.45.1 (12-May-2019)
  Discarding device blocks: done
  Creating filesystem with 80 1k blocks and 16 inodes

  Allocating group tables: done
  Writing inode tables: done
  Writing superblocks and filesystem accounting information: done

There are two ways to solve this:

  1) change the command to force 1024 byte block sizes; the -b argument
has existed in e2fsprogs since at least the 1.42 version included in
ubuntu 12.04 LTS.

  2) the image was setup to be laughably small to ensure the testsuite
could run successfully in relatively small scale environments; we could
bump the generated image to 128 blocks (512KB), which would let mkfs
succeed while still not excessively consuming space.

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https://bugs.launchpad.net/bugs/1834192

Title:
  apparmor mult_mount regression test fails in eoan

Status in apparmor package in Ubuntu:
  Confirmed

Bug description:
  In running adt testing on 5.2-based kernels for eoan, I'm seeing
  failures from the apparmor mult_mount regression test. Running the
  test case manually with -x yields:

   + dd if=/dev/zero of=/tmp/sdtest.2210-22387-i6UxxQ/image.ext3 bs=4096 
count=20
   + mkfs.ext2 -F -m 0 -N 10 /tmp/sdtest.2210-22387-i6UxxQ/image.ext3
   ++ error_handler
   ++ fatalerror 'Unexpected shell error. Run with -x to debug'

  Running the following manually in a shell also fails in eoan with the
  5.0 kernel copied forward from disco, while it passes in disco:

   $ uname -a
   Linux ee-apparmor 5.0.0-17-generic #18-Ubuntu SMP Tue Jun 4 15:34:08 UTC 
2019 x86_64 x86_64 x86_64 GNU/Linux
   $ dd if=/dev/zero of=test.img bs=4096 count=20
   20+0 records in
   20+0 records out
   81920 bytes (82 kB, 80 KiB) copied, 0.000406443 s, 202 MB/s
   $ mkfs.ext2 -F -m 0 -N 10 test.img
   mke2fs 1.45.2 (27-May-2019)
   test.img: Not enough space to build proposed filesystem while setting up 
superblock

  So this seems likely to be due to some change with mke2fs; not sure if
  this is a regression there or if the test was getting away with doing
  something invalid.

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