Re: [PATCH PLACEHOLDER 1/3] fs/exec: "always_unprivileged" patch

[Andrew Lutomirski]

On Thu, Jan 12, 2012 at 3:47 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Thu, Jan 12, 2012 at 3:38 PM, Will Drewry <wad@xxxxxxxxxxxx> wrote:
>> This patch is a placeholder until Andy's (luto@xxxxxxx) patch arrives
>> implementing Linus's proposal for applying a "this is a process that has
>> *no* extra privileges at all, and can never get them".
>
> I think we can simplify and improve the naming/logic by just saying
> "can't change privileges".
>
> I'd argue that that even includes "can't drop them", just to make it
> really clear what the rules are.

That may prevent another use: set this new flag, chroot, drop
privileges, accept network connections.  (The idea being that chroot
might work unprivileged if this flag is set.)

--Andy
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