Messages in this thread | | | From | Sargun Dhillon <> | Date | Thu, 19 Dec 2019 21:21:23 -0800 | Subject | Re: [PATCH v4 2/5] pid: Add PIDFD_IOCTL_GETFD to fetch file descriptors from processes |
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On Thu, Dec 19, 2019 at 5:43 PM Andy Lutomirski <luto@kernel.org> wrote: > > > I don't think this is MODE_READ. By copying an fd from the task, you > can easily change its state. Would PTRACE_MODE_ATTACH_REALCREDS work? I'm curious what kind of state change you can cause by borrowing an FD?
> > IMO it would be really nice if pidfd could act more like a capability > here and carry a ptrace mode, for example. But I guess it doesn't > right now. > > > --Andy
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