krb5: Fix crash in resolving "DIR" as a ccache name (Fix #1108)

2023-05-26 13:47:26 -05:00
parent 7812c17f95
commit 39f24c4cd4
2 changed files with 3 additions and 5 deletions
--- a/lib/krb5/dcache.c
+++ b/lib/krb5/dcache.c
@@ -377,7 +377,7 @@ dcc_resolve_2(krb5_context context,
         *
         */

-        if (*res == '\0' || (res[0] == ':' && res[1] == '\0')) {
+        if (res == NULL || *res == '\0' || (res[0] == ':' && res[1] == '\0')) {
            /* XXX Why not? */
            krb5_set_error_message(context, KRB5_CC_FORMAT,
                                   N_("\"DIR:\" is not a valid ccache name", ""));