[Bug 663069] Re: "non-accessable symlink" errors when using aufs-shaddowed read-only root filesystem

[Remi REROLLE]

Can be easily reproduced with the following steps:

mkdir ro rw aufs
touch ro/foo
sudo mount -t aufs -o br:rw:ro none aufs
mv aufs/{foo,bar}

Gives the following output:

mv: cannot move `aufs/foo' to `aufs/bar': Operation not permitted

And:

dmesg | tail -1
[179473.298795] non-accessible hardlink creation was attempted by: mv (fsuid 1000)

I confirm the kernel.yama.protected_nonaccess_hardlinks=0 workaround

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"non-accessable symlink" errors when using aufs-shaddowed read-only root filesystem
https://bugs.launchpad.net/bugs/663069
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