DF2515[cdblen=12]: orb[5]=c0c1c2c3 orb[6]=c4c5c6c7 orb[7]=c8c9cacb
DF2515: ind_ptr[0]=cccccccc/dddddddd ... RESULT=clean
DF2515[cdblen=16]: ind_ptr[0]=cfcecdcc/dddddddd (canary was CCCCCCCC/DDDDDDDD)
DF2515: RESULT=OVERFLOW (cdb_len>12 spills into ind_ptr[0].hi on the DMA-coherent ocb)
--- fixed source A/B ---
DF2515[cdblen=16]: ind_ptr[0]=cccccccc/dddddddd ... RESULT=clean
   (dmesg: "sbp: CDB too long for ORB, clamped")