Comment 37 for bug 870326

I can confirm the same. I recently experienced a flood of thousands of such ecryptfs dmesg errors, so many that I was alerted to the issue by errors regarding zero disk space remaining.

After reading up on Bug #372014, I resolved (hopefully) the issue by deleting all ecryptfs-encrypted files of zero length:

find $HOME/.Private/ -size 0c -exec ls '{}' \; | wc -l

will output the number of such files. I then proceeded to remove the listed files.