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

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Sat Oct 12 23:18:49 CEST 2019

Nikos Mavrogiannopoulos commented on a discussion on lib/x509/x509.c: https://gitlab.com/gnutls/gnutls/merge_requests/1092#note_229671610

>  		goto cleanup;
>  	}
> -	if (othername_oid && type == GNUTLS_SAN_OTHERNAME) {
> +	/* ooid.data is only set if type == GNUTLS_SAN_OTHERNAME.
> +	 * We check ooid.data here instead of type to avoid false positives from
> +	 * static analyzers. See Coverity issue #1361513. */
> +	if (othername_oid && ooid.data) {

It may be that you are right, however that's risky code, as you depend on what `gnutls_subject_alt_names_get()` is currently doing internally. A refactor of it, and this unrelated code will break. I think the more conservative and safe we are, the better.

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