Comment 2 for bug 404708

The problem still exists in

ii linux-image-generic 2.6.31.14.27 Generic Linux kernel image

…and I just discovered that it is even worse than previously thought. The bug introduces silent data corruption.

I was just trying to update my backup (this time over Ethernet instead of WLAN, because I added a lot of data) but it never remotely finished because SSH noticed a data corruption in the network transmission:

debug1: Sending command: rsync --server --sender -vlHogDtprSe.iLs --numeric-ids . /mnt/image/
receiving incremental file list
Disconnecting: Corrupted MAC on input.
rsync: connection unexpectedly closed (55356 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(600) [receiver=3.0.6]
rsync: writefd_unbuffered failed to write 5 bytes to socket [generator]: Broken pipe (32)
rsync error: unexplained error (code 255) at io.c(1525) [generator=3.0.6]

Of course, the problem disappeared after I deactivated gso.