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SubjectRe: call_usermodehelper in containers
On 11/18, Oleg Nesterov wrote:
> On 11/15, Eric W. Biederman wrote:
> >
> > I don't understand that one. Having a preforked thread with the proper
> > environment that can act like kthreadd in terms of spawning user mode
> > helpers works and is simple.
> Can't we ask ->child_reaper to create the non-daemonized kernel thread
> with the "right" ->nsproxy, ->fs, etc?
> IOW. Please the the "patch" below. It is obviously incomplete and wrong,
> and it can be more clear/clean. And probably we need another API. Just
> to explain what I mean.

Or, perhaps UMH_IN_MY_NS should only work if ->child_reaper explicitly
does, say, prctl(PR_SPAWN_UMH_IN_NS_HELPER) which forks the non-daemonized
kernel kthread_worker thread, I dunno.


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