Added check for null

diff --git a/lib/x509/extensions.c b/lib/x509/extensions.c
index 5b2da0e38c7d53ee9da33dc4ad875cea09a0eb6e..7bd8571bf1263e497da739b94bf1a127b2e5c191 100644 (file)
--- a/lib/x509/extensions.c
+++ b/lib/x509/extensions.c
@@ -829,6 +829,9 @@ _gnutls_write_general_name(ASN1_TYPE ext, const char *ext_name,
        int result;
        char name[128];
 
+       if (data == NULL)
+               return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
+
        switch (type) {
        case GNUTLS_SAN_DNSNAME:
                str = "dNSName";