[TLS] Length of a variable-length vector: Could it be an odd multiple?

[Jong-Shian Wu <[e-mail]>]

I have a question about the even-vs-odd restrictions on the length of
a valid variable-length vector defined in TLS specification after
reading the section 4.3 of RFC 5246 [1] which states that: "The length
of an encoded vector must be an even multiple of the length of a
single element (for example, a 17-byte vector of uint16 would be
illegal)."

Does it also means that an 18-byte vector of uint16 would be illegal?
(18 is an odd multiple of 2, not an *even* multiple of 2)

To put it differently, given the following definitions for Foo and Bar:

   opaque Foo[2];
   Foo Bar<4..8>;

Is it correct to say that there does not exist any valid 6-byte value
of type Bar?  (6 is not an even multiple of 2)

[1]: https://tools.ietf.org/html/rfc5246#section-4.3