Comment 9 for bug 1873074

Exploit / Remote:
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The remote exploit is possible if such file is opened in
response to an event, for example, a web server document
stored in an aufs mountpoint.

This obviously takes more time - each i_readcount_inc() is
delayed by a remote access - but it may be sped up by many
attackers, say a DDoS, if it's possible to figure or brute
force which URLs lead to an aufs-backed file in the server.

(This can happen with Kubernetes/docker containers using
the aufs storage driver for container images for example,
with static document in the container image, and exposed
via a web server, say nginx, a very popular docker image.)

See the 'Problem Demonstration' section w/ this example.