On Thu, 31 Aug 2000, Tigran Aivazian wrote:
> Actually, microcode driver checks CAP_SYS_RAWIO only on open() so it
> would allow access to the receiver of fd even he has no CAP_SYS_RAWIO
> privilege. Hmmm, maybe I should put it back into write() method, as
> Linus (or someone else) did at some point (and I removed it)...
Surely that's correct. Observe that root can send me
an fd to /etc/shadow or /dev/kmem if it so chooses.
Granted, the mtrr and microcode drivers aren't hugely
useful to non-root code, but I see no reason why this
should be a special case.
MAtthew.
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This archive was generated by hypermail 2b29 : Thu Aug 31 2000 - 21:00:26 EST