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SubjectRe: [security]: kernel ioctl()'s [3]
Jim Dennis wrote:

> > assumptions are generally bad.
> Failure to check for errors is often BAD.

very :)


> > two situations immediately come to mind.
>
> > - extended attribute; immutable
> > - extended attribute; append only
> > - filesystem mounted RO
> > - 100% filesystem usage, 0% free
>
> --- that's four;

actually i was thinking attributes and filesystems, just made a transition
without typing it.


> Let's also add
>
> - System is BSD 4.4 and user immutable or user append-only
> UFS flag is set.

indeed, it's much better to be overly cautious about checking than it is to
assume input is within parameters.

-d


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