Comment 1 for bug 162582

This looks to be the same bug I have been trying to analyze in Ubuntu bug #148003. It was reported there that the existence of this stale device node often prevents auto-mounting of encrypted USB memory sticks, etc.

There appears to be a race condition in the processes spawned by udev. The file /dev/mapper/temporary-cryptsetup-XXXX is created and then almost immediately destroyed. But it appears that the "remove" event gets processed before the "add" event is finished, with unfortunate results.