From 60b5598032b3c36660984e7d49a5ff929ecd6e26 Mon Sep 17 00:00:00 2001
From: Richard Hughes <richard@hughsie.com>
Date: Mon, 8 Feb 2021 18:41:45 +0000
Subject: [PATCH 11/11] wacom-usb: Fix a buffer-overread spotted by
 AddressSanitizer

---
 plugins/wacom-usb/fu-wac-firmware.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git plugins/wacom-usb/fu-wac-firmware.c plugins/wacom-usb/fu-wac-firmware.c
index d3a41682..ae1e7cac 100644
--- plugins/wacom-usb/fu-wac-firmware.c
+++ plugins/wacom-usb/fu-wac-firmware.c
@@ -65,7 +65,7 @@ fu_wac_firmware_parse (FuFirmware *firmware,
 			guint cmdlen = strlen (lines[i]);
 
 			/* header info record */
-			if (memcmp (lines[i] + 2, "COM", 3) == 0) {
+			if (cmdlen > 3 && memcmp (lines[i] + 2, "COM", 3) == 0) {
 				guint8 header_image_cnt = 0;
 				if (cmdlen != 40) {
 					g_set_error (error,
-- 
2.29.2