[Bug 518582] Re: mount ext fileystem fails, booting fails, blkid produces no output

[Kees Cook]

This failure mode depends on the size of the filesystem, the number of
reserved blocks, and the inodes used.  This series of steps reproduces
the problem for me:

rm -f /dev/shm/test.ext4
dd if=/dev/zero of=/dev/shm/test.ext4 bs=1 count=1 seek=1023M
mkfs.ext4 -F /dev/shm/test.ext4
tune2fs -r 0 /dev/shm/test.ext4
mkdir -p /mnt/test
mount -o loop /dev/shm/test.ext4 /mnt/test
echo $(seq $(( $(hexdump -s 0x410 -n 2 -e '"%d\n"' /dev/shm/test.ext4) - 5007 )) ) | (cd /mnt/test; xargs touch)
umount /mnt/test
blkid -p /dev/shm/test.ext4

/dev/shm/test.ext4: ambivalent result (probably more filesystems on the
device, use wipefs(8) to see more details)

-- 
mount ext fileystem fails, booting fails, blkid produces no output
https://bugs.launchpad.net/bugs/518582
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