From 1e02cdc0c949b0ae4a8b82ac98baf5f11b6bc593 Mon Sep 17 00:00:00 2001
From: "Christian W. Zuckschwerdt" <christian@zuckschwerdt.org>
Date: Wed, 8 Nov 2023 22:00:57 +0100
Subject: [PATCH] minor: Add all-zero sanity check to Revolt-NC5462 (closes
 #2715)

---
 src/devices/revolt_nc5462.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/devices/revolt_nc5462.c b/src/devices/revolt_nc5462.c
index 7273df97d..17066bdf4 100644
--- a/src/devices/revolt_nc5462.c
+++ b/src/devices/revolt_nc5462.c
@@ -65,6 +65,9 @@ static int revolt_nc5462_decode(r_device *decoder, bitbuffer_t *bitbuffer)
     uint8_t *b = bitbuffer->bb[0];
 
     int sum = add_bytes(b, 11);
+    if (sum == 0) {
+        return DECODE_FAIL_SANITY;
+    }
     int chk = b[11];
     if ((sum & 0xff) != chk) {
         return DECODE_FAIL_MIC;