diff --git a/drivers/greybus/gb-beagleplay.c b/drivers/greybus/gb-beagleplay.c
index 305066febbe7..244966d56c9b 100644
--- a/drivers/greybus/gb-beagleplay.c
+++ b/drivers/greybus/gb-beagleplay.c
@@ -623,6 +623,13 @@ static size_t cc1352_bootloader_rx(struct gb_beagleplay *bg, const u8 *data,
 		return count;
 	}
 
+	if (count > sizeof(bg->rx_buffer) - bg->rx_buffer_len) {
+		dev_warn(&bg->sd->dev,
+			 "dropping oversized bootloader receive chunk");
+		bg->rx_buffer_len = 0;
+		return count;
+	}
+
 	memcpy(bg->rx_buffer + bg->rx_buffer_len, data, count);
 	bg->rx_buffer_len += count;