Avp14m Incorrect Length Info

# Extract raw bytes around avp14m from a binary file
xxd -g1 firmware.bin | grep -A2 -B2 "61767031346d"  # hex for 'avp14m'
In secure boot chains, a hash or signature block must be exactly a certain length (e.g., 14 bytes for a truncated SHA-1 or a custom CRC). An unexpected length suggests tampering, memory corruption, or a version mismatch.

| Cause Category | Specific Explanation |
|----------------|----------------------|
| Protocol mismatch | Sender and receiver expect different lengths for avp14m (e.g., one uses 14 bytes, the other 16). |
| Endianness / alignment | Padding bytes added by compiler (e.g., struct packing) cause actual length ≠ expected. |
| Corrupted data | Transmission errors, storage bit flips, or incomplete writes altered the field length. |
| Version incompatibility | Newer firmware uses extended avp14m but older parser expects original length. |
| Encoding issue | ASCII vs. UTF-16 vs. binary representation changes length (e.g., “14m” means 14 characters, but actual data uses 14 wide chars = 28 bytes). |
| Buffer management bug | Calling code passed wrong size parameter to read/write function. |
| File corruption | Header or offset miscalculation causes parser to read wrong segment. | avp14m incorrect length