--- zzzz-none-000/linux-3.10.107/drivers/media/firewire/firedtv-avc.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/firewire/firedtv-avc.c	2021-02-04 17:41:59.000000000 +0000
@@ -1157,6 +1157,10 @@
 		if (pmt_cmd_id != 1 && pmt_cmd_id != 4)
 			dev_err(fdtv->device,
 				"invalid pmt_cmd_id %d\n", pmt_cmd_id);
+		if (program_info_length > sizeof(c->operand) - 4 - write_pos) {
+			ret = -EINVAL;
+			goto out;
+		}
 
 		memcpy(&c->operand[write_pos], &msg[read_pos],
 		       program_info_length);
@@ -1180,6 +1184,12 @@
 				dev_err(fdtv->device, "invalid pmt_cmd_id %d "
 					"at stream level\n", pmt_cmd_id);
 
+			if (es_info_length > sizeof(c->operand) - 4 -
+					     write_pos) {
+				ret = -EINVAL;
+				goto out;
+			}
+
 			memcpy(&c->operand[write_pos], &msg[read_pos],
 			       es_info_length);
 			read_pos += es_info_length;