Description of problem:
Frequently when I plug in my (LUKS encrypted) USB memory stick, systemd-udevd seems to get itself into an infinite loop, filling dmesg logs with the following

[40541.715156] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.715349] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.715544] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.715739] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.715878] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.716232] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.716428] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.717882] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.718112] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.718174] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.718364] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.718552] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.718743] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.718935] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.719215] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.719359] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.719417] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.719609] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.721780] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.721973] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.722209] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.722401] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists
[40541.722556] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.722749] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk: File exists
[40541.723974] systemd-udevd[11549]: Failed to set security context (null) for /dev/disk/by-path: File exists

the USB disk never gets mounted. Unplugging & plugging back in the USB disk does not make any difference. The only solution I've found is to kill the systemd-udevd process & let it be re-started by systemd. It'll then work fine for a (unknown) period of time, when the problem will occur again.


Version-Release number of selected component (if applicable):
systemd-197-1.fc18.1.x86_64

How reproducible:
Often, but not always

Steps to Reproduce:
1. Plug in a USB memory stick (not sure if it having LUKS encryption is relevant)
2.
3.
  
Actual results:
The disk never gets mounted, and the logs fill with the messages shown above

Expected results:
The disk is mounted & accessible to my desktop user

Additional info: