DF2525[BAD-CHECKSUM]: sizeof(NVRAMTYPE)=128 NvramTarget offset=10 sizeof(u_long)=8
  0078: 00 00 77 00 00 00 a9 77 00 00 77 00 ...   <- 8-byte straddling stores
DF2525: guard bytes 128..383 smashed=122 first=128 last=249 -> 122 bytes past the 128-byte struct end touched
DF2525: RESULT=OOB WRITE (ILP32 u_long stores spill past NVRAMTYPE)
--- control (checksum good) --- smashed=0 clean
--- fixed source A/B --- smashed=0 clean