Re: [PATCH] capabilites, take 2

[Olaf Dietsche <olaf+list.linux-kernel@olafdietsche.de>]

Valdis.Kletnieks@vt.edu writes:

> On Thu, 13 May 2004 18:20:10 PDT, Chris Wright said:
>
>> I think it still needs more work.  Default behavoiur is changed, like
>> Inheritble is full rather than clear, setpcap is enabled, etc.  Also,
>> why do you change from Posix the way exec() updates capabilities?  Sure,
>> there is no filesystem bits present, so this changes the calculation,
>> but I'm not convinced it's as secure this way.  At least with newcaps=0.
>
> The last time the "capabilities" thread reared its head a while ago, Andy made
> a posting that pretty conclusively showed that the Posix way was totally b0rken
> if you ever intended to support filesystem bits.  So if you wanted to ever have
> a snowball's chance of supporting something like:
>
> chcap cap_net_raw+ep /bin/ping

Seems like you're not aware of:
<http://www.olafdietsche.de/linux/capability/>

This supports filesystem capabilities with the current (POSIX?)
implementation. So, whatever Andy has shown, it has at least one
counter evidence q.e.d.

> 2) Toss all the filesystems capabilities support out the window.

I agree to disagree ;-)

Regards, Olaf.