I know I'm new to this thread (took a while to find a match to the symptom), but I've been experiencing this issue as well (first on Manjaro, now on Xubuntu, both give problems with 4.13 but are fine in 4.9/4.10). Just installed your test kernel (lp1742630) to my Xubu16.04 installation. The panic is gone, but so is the offending SAS controller according to the dmesg output.
Attaching the dmesg (and some system info if needed) outputs, but if you need additional information just say the word.