From 31815bd66e1ee43901ee990a843937d2f471905d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Fri, 5 Aug 2022 12:45:52 +0200
Subject: [PATCH] main: limit EDID length to 256 bytes

---
 main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index 1b99168..ac9d9a3 100644
--- a/main.c
+++ b/main.c
@@ -378,7 +378,10 @@ i2c_end:
 		softi2c_master_stop();
 		if (0 == i2c_rc) {
 			puts("success\r\n");
-			const uint16_t edid_len = edid_length(edid_sink); // get length
+			uint16_t edid_len = edid_length(edid_sink); // get length
+			if (edid_len > 256) { // we only support up to one extension
+				edid_len = 256;
+			}
 			if (edid_len) { // EDID is valid
 				edid_modify(edid_sink); // modify EDID to include firewall indication
 				// compare saved/source and sink EDID