Don't let winbind getgroups crash when we have no gids in the token.

Guenther

diff --git a/source/nsswitch/winbindd_group.c b/source/nsswitch/winbindd_group.c
index c7baecfbaa6532abd144100b26fa3922b35faced..cc8bfb0c404a57a4d1033cb8af2c4b116cda3bfe 100644 (file)
--- a/source/nsswitch/winbindd_group.c
+++ b/source/nsswitch/winbindd_group.c
@@ -1398,8 +1398,11 @@ static void getgroups_sid2gid_recv(void *private_data, BOOL success, gid_t gid)
 
        s->state->response.data.num_entries = s->num_token_gids;
        /* s->token_gids are talloced */
-       s->state->response.extra_data.data = smb_xmemdup(s->token_gids, s->num_token_gids * sizeof(gid_t));
-       s->state->response.length += s->num_token_gids * sizeof(gid_t);
+       if (s->num_token_gids != 0) {
+               s->state->response.extra_data.data = smb_xmemdup(
+                       s->token_gids, s->num_token_gids * sizeof(gid_t));
+               s->state->response.length += s->num_token_gids * sizeof(gid_t);
+       }
        request_ok(s->state);
 }