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SubjectRe: reproduceable GPF in 2.0.23 with Quota when unmounting /proc
On Sat, 26 Oct 1996, Mark Levitt wrote:

> Obviously, you can't unmount it unless your root, and root can always do
> lots of things that would cause an oops or downright crash the machine.

You want to unmount /proc on shutdown (umount -a) and it's quite important
that your machine not crash then (because otherwise your other filesystems
won't get unmounted).

In general, even root shouldn't be able to cause a kernel Oops or machine
lockup without doing something particularly evil (writing to /dev/ioport
and loading duff kernel modules are two obvious examples).


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