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SubjectRe: [PATCH] New phys_addr() syscall
Olivier Galibert writes:
> On Sun, Jul 19, 1998 at 02:24:15PM +0200, Alexander Kjeldaas wrote:
> > I this is only useful for specialized utilities, I suggest you check
> > for capable(CAP_SYS_ADMIN) in the system call.
> Relying of the fact that a process not having the capability is unable
> to know the physical address of a virtual page is nothing but security
> through obscurity. Linux' security is not snake oil.
> Besides, it would require to give a special capability to process
> needing the system call for nothing more than display purposes, which
> increases the number of potential security flaws while not adding real
> security.
> Hence, bad idea.

Amen. Let's not jump to restricting things by default.



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