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SubjectRe: [PATCH] New phys_addr() syscall
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

Hence, bad idea.


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