Fix denial of service - memory corruption.

[samba.git] / lib / tevent / tevent_standard.c

diff --git a/lib/tevent/tevent_standard.c b/lib/tevent/tevent_standard.c
index c3f8b36e840faf52773d1e7c6327a23cf909c7c4..d4a00cc062a4e472a309d211f490e979cc36c134 100644 (file)
--- a/lib/tevent/tevent_standard.c
+++ b/lib/tevent/tevent_standard.c
@@ -457,6 +457,11 @@ static int std_event_loop_select(struct std_event_context *std_ev, struct timeva
 
        /* setup any fd events */
        for (fde = std_ev->ev->fd_events; fde; fde = fde->next) {
+               if (fde->fd < 0 || fde->fd >= FD_SETSIZE) {
+                       std_ev->exit_code = EBADF;
+                       return -1;
+               }
+
                if (fde->flags & TEVENT_FD_READ) {
                        FD_SET(fde->fd, &r_fds);
                }