Hi, Both me and a colleague are bit by the same/a similar bug. The Null Pointer Dereference here is at sd_resume during early boot, but looks very much related to this issue.
The last kernel able to boot for me is 4.1.0-2-amd64 Anything later than that (including linux-image-4.3.0-trunk-amd64 4.3-1~exp1) does not work anymore. So yes, it appears to be broken *since* 49718f0fb8c9 ("SCSI: Fix NULL pointer dereference in runtime PM") and the patches from Ken Xue may be helpful (untested). Regards, Erich