DF2529: OUT transfer blen=255, buffer[255]=0x5A guard; count=256 ret=0 error=0
DF2529: OOB reads=1 byte=0x5a at buffer[255] (PAST the transfer buffer)
DF2529: log: OUT[off=255]=5a OOB-READ
DF2529: RESULT=1-BYTE HEAP OOB READ clocked to the peripheral (len=2 picked with exactly 1 byte remaining)
--- fixed source A/B ---
DF2529: OOB reads=0 ... RESULT=no OOB