Re: ioctl CAP_LINUX_IMMUTABLE is checked in the wrong namespace

From: Theodore Ts'o
Date: Tue Apr 29 2014 - 20:32:54 EST


On Wed, Apr 30, 2014 at 12:16:41AM +0000, Serge Hallyn wrote:
> I forget the details, but there was another case where I wanted to
> have the userns which 'owns' the whole fs available. I guess we'd
> have to check against that instead of using inode_capable.

Yes, that sounds right.

And *please* tell me that that under no circumstances can anyone other
than root@init_user_ns is allowed to use mknod....

- Ted
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