From 5bcd8c130abe6a27c11e6143aac04bd979bcc5b2 Mon Sep 17 00:00:00 2001
From: mark9064 <30447455+mark9064@users.noreply.github.com>
Date: Tue, 13 Feb 2024 01:20:46 +0000
Subject: [PATCH] Fix OOB flash write when DFU interrupted

If a DFU is restarted, the write indices aren't reset causing the image to be written out of bounds. The CRC check prevents the faulty image from booting but LittleFS still gets nuked.
---
 src/components/ble/DfuService.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/components/ble/DfuService.cpp b/src/components/ble/DfuService.cpp
index 1f06b69ee8..b3f2ff105d 100644
--- a/src/components/ble/DfuService.cpp
+++ b/src/components/ble/DfuService.cpp
@@ -357,6 +357,8 @@ void DfuService::DfuImage::Init(size_t chunkSize, size_t totalSize, uint16_t exp
   this->totalSize = totalSize;
   this->expectedCrc = expectedCrc;
   this->ready = true;
+  totalWriteIndex = 0;
+  bufferWriteIndex = 0;
 }
 
 void DfuService::DfuImage::Append(uint8_t* data, size_t size) {