Looks like this kernel has a bad backport of upstream commit 2a708cff93f1 ("dm: fix AB-BA deadlock in __dm_destroy()"). To confirm this, I've uploaded a test kernel with this backport reverted:
http://people.canonical.com/~henrix/lp1522766/v1/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1522766 Title: cryptsetup hangs after kernel upgrade to 3.13.0-72.115 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1522766/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs