[gnutls-devel] libtasn1 | _asn1_expand_object_id: added safety against use after free (!51)

[Development of GNU's TLS library]

Nikos Mavrogiannopoulos commented on a discussion on lib/parser_aux.c: https://gitlab.com/gnutls/libtasn1/merge_requests/51#note_238305676

>    return p->left;
>  }
>  
> +static
> +unsigned _asn1_is_up (asn1_node_const up_cand, asn1_node_const down)
> +{
> +  asn1_node_const d,u;
> +
> +  if (up_cand == NULL || down == NULL)
> +    return 0;
> +
> +  d = down;
> +
> +  while ((u=_asn1_find_up(d)) != NULL && u != d)

Thanks done.

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