When an automount unit ceases to exist across daemon-reload (observed: because a generator no longer emits it), its deserialized state still makes `automount_coldplug()` pick up the autofs pipe and resume the unit as waiting/running. But nothing can serve that mount point anymore. The kernel keeps blocking every process that touches the mount point until PID 1 answers (which it won't), forever. To fix this, fail pending requests and unmount the autofs when coldplugging an automount unit that is not loaded anymore. Fixes #43700 Signed-off-by: Martin Pitt <martin@amutable.com>
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