zero-initialize fds and buffs before ipc_sendrecv_with_fds (#659)

zero-initialize fds and buffs before ipc_sendrecv

Author: deanlee

msgq/visionipc/visionipc_client.cc

@@ -52,8 +52,8 @@ bool VisionIpcClient::connect(bool blocking) {
   assert(r == sizeof(type));
 
   // Get FDs
-  int fds[VISIONIPC_MAX_FDS];
-  VisionBuf bufs[VISIONIPC_MAX_FDS];
+  int fds[VISIONIPC_MAX_FDS] = {};
+  VisionBuf bufs[VISIONIPC_MAX_FDS] = {};
   r = ipc_sendrecv_with_fds(false, socket_fd, &bufs, sizeof(bufs), fds, VISIONIPC_MAX_FDS, &num_buffers);
   if (r < 0) {
     // only expected error is server shutting down

msgq/visionipc/visionipc_server.cc

@@ -134,9 +134,9 @@ void VisionIpcServer::listener(){
       continue;
     }
 
-    int fds[VISIONIPC_MAX_FDS];
+    int fds[VISIONIPC_MAX_FDS] = {};
     int num_fds = buffers[type].size();
-    VisionBuf bufs[VISIONIPC_MAX_FDS];
+    VisionBuf bufs[VISIONIPC_MAX_FDS] = {};
 
     for (int i = 0; i < num_fds; i++){
       fds[i] = buffers[type][i]->fd;