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SubjectRe: Does this help explain better?? ATA/IDE Thread
On Sat, 22 Jul 2000, TimO wrote:

> "H. Peter Anvin" wrote:
> >
> > Followup to: <>
> > By author: Andre Hedrick <>
> > In newsgroup:
> > >
> > > Everyone
> > >
> > > I am talking about attempting to invoke unknown vender specific commands
> > > They do comply with the SPEC but are not part of the SPEC.
> > > Since I do not have the priviledge of knowing these facts, but know they
> > > exist. You can not allow a rouge driver attempt to invoke these commands.
> > >
> >
> > A rogue driver can always do this by writing straight to the
> > interface. I think a more serious issue is: what about a *buggy*
> > drivers? However, what I am a bit unclear of is the following: will
> > this patch prevent me from writing a driver which issues legitimate
> > vendor-specific commands to control vendor-specific aspects of a
> > particular piece of hardware? If so, that would be a very bad thing.
> > However, if this patch is there to prevent buggy programs from issuing
> > known-to-be-damaging commands by accient, then that is a Good
> > Thing[TM].
> Vendor-specific commands would not be allowed through the kernel. A
> specific program for a specific vendor would have to use RAW_IO; ie
> for firmware upgrades.

NO. They can/will use RAW_IO *IF* this is available to them. If not, they
will have to provide a proper kernel driver for their hardware. I know
which I prefer...

> > I personally would have to agree with the people that say this isn't a
> > security issue, but I *do* believe that protecting buggy programs (we
> > never have any of those, right?) from causing permanent damage to the
> > hardware is a very useful thing.
> This is EXACTLY what Andre is trying to accomplish.

Yep - WTF is wrong with that?


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