Guard against pointer overrun if sock is set negative

2 years ago · 3d9d881920
1 changed files with 1 additions and 1 deletions
--- a/src/edge_utils.c
+++ b/src/edge_utils.c
@ -2869,7 +2869,7 @@ int run_edge_loop (n2n_edge_t *eee) {
            // any or all of the FDs could have input; check them all
            // external
-            if(FD_ISSET(eee->sock, &socket_mask)) {
+            if((eee->sock >= 0) && FD_ISSET(eee->sock, &socket_mask)) {
                if(0 != fetch_and_eventually_process_data(eee, eee->sock,
                                                          pktbuf, &expected, &position,
                                                          now)) {