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Eric W. Biederman authored
The code that places signals in signal queues computes the uids, gids, and pids at the time the signals are enqueued. Which means that tasks that share signal queues must be in the same pid and user namespaces. Sharing signal handlers is fine, but bizarre. So make the code in fork and userns_install clearer by only testing for what is functionally necessary. Also update the comment in unshare about unsharing a user namespace to be a little more explicit and make a little more sense. Acked-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com>
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