[DF-4127 case A] vco=200 ref=10000 ss_rate=30 ss_pct=2 scale=1 -> inner (vco*10)/2048 = 0
OOB confirmed: SIGFPE (integer divide by zero) in verbatim rv6xx_calculate_spread_spectrum_clk_v
RESULT: VULNERABLE — divide-by-zero taken (kernel analog: #DE panic) (exit 77)