[gnutls-devel] GnuTLS | Fix coverity in lib/ (!1092)

[Development of GNU's TLS library]

Nikos Mavrogiannopoulos started a new discussion on lib/str.c: https://gitlab.com/gnutls/gnutls/merge_requests/1092#note_230218330

>  	gnutls_datum_t tdata;
>  
>  	_gnutls_buffer_pop_datum(str, &tdata, req_size);
> -	if (tdata.data == NULL || tdata.size != req_size) {
> +	if (tdata.data == NULL || tdata.size > req_size) {

Hmmm, that is tricky. This function has no way to return the size of the data, nor it is expected to. It is all or nothing, so the existing limitation seems reasonable.

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