diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c
index e4561264e12439a8f24f2a63e94ac2572b0d47a0..e5be920c059978d3194d1159c1f1a1419879eb58 100644
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -140,11 +140,20 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
 		goto out;
 	}
 
+	for (i = 0; i < count; i++) {
+		if (txbuf[i] > IR_MAX_DURATION / 1000 - duration || !txbuf[i]) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		duration += txbuf[i];
+	}
+
 	ret = dev->tx_ir(dev, txbuf, count);
 	if (ret < 0)
 		goto out;
 
-	for (i = 0; i < ret; i++)
+	for (duration = i = 0; i < ret; i++)
 		duration += txbuf[i];
 
 	ret *= sizeof(unsigned int);