Re: [PATCH] Security: Add prctl(PR_{GET,SET}_NETWORK) interface.

Andi Kleen
2009-12-17T17:14:55Z

> This is not very good because in some situations it is useful to disable
> connect() and bind() while still allowing ptracing of other processes. For
> example, Plash creates a new UID for each sandbox and it is possible to use
> strace and gdb inside a sandbox. Currently Plash is not able to block
> network access or allow only limited network access. If you treat ptrace()
> this way we won't have the ability to use strace and gdb while limiting
> network access.

No that's not what the hunk does. I first thought the same. But it actually
just limits these processes from initiating ptracing themselves. You can still
attach gdb/strace to them.

Now I'm not sure if that's closing all holes, but at least I can't come
up with any obvious ones currently. I think I would still prefer a more
general security container in general.

-Andi
--
ak@linux.intel.com -- Speaking for myself only.