Comment 26 for bug 463347

I also included the fix for http://git.kernel.org/?p=linux/hotplug/udev.git;a=commit;h=4daa146b into the SRU. It immediately breaks udev when building with -O0 on amd64. It's purely coincidental that it seems to work with the current .debs (apparently the upper bits of nbytes are usually zero), but it's a disaster waiting to happen, and the fix is obvious.

I stumbled over this myself when I debugged the original problem here, and independently arrived at the same patch.