Comment 11 for bug 842647

The patch I linked to in comment 10 breaks plaintext passthrough support. The logic around handling plaintext passthrough and the metadata-in-xattrs feature is very delicate in this part of the code. I'd love to deprecate/remove those two "features" in future kernels, as they're rarely used by anyone, but we need a fix that is backportable.

I'm going to think this through a little more and I hope to have a new patch this later this evening.