Re: mount

[Michal Zalewski <lcamtuf () coredump cx>]

On Thu, 27 Dec 2001, undef wrote:

> I found that one could mount any device to some mount point which
> already have something mounted to it. It is possible some device
> (physical or virtual through vinum or NFS) to /. When two devices are
> mounted to one mount point you could see contents of the last mounted
> device. When you umount that last device you will see contents of the
> first mounted device.

Well, actually, on some Linux boxes it gets worse. For example, depending
on how you chdir() to a root directory, you can end up in one filesystem
or in another - some possibilities include /, ../../, somedir/../../, //,
don't remember the extact combination... at least that's my experience
with 2.2 a while ago.

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