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protect the write method writing more than supposed to

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John Doe 2015-07-03 14:19:23 +03:00 committed by Ivan Grokhotkov
parent bfbfd31315
commit d969115cda
1 changed files with 3 additions and 0 deletions
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3
cores/esp8266/Updater.cpp
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@ -121,6 +121,9 @@ size_t UpdaterClass::write(uint8_t *data, size_t len){
if(hasError()) if(hasError())
return 0; return 0;
if(len > remaining())
len = remaining();
while((_bufferLen + left) > FLASH_SECTOR_SIZE){ while((_bufferLen + left) > FLASH_SECTOR_SIZE){
size_t toBuff = FLASH_SECTOR_SIZE - _bufferLen; size_t toBuff = FLASH_SECTOR_SIZE - _bufferLen;
memcpy(_buffer + _bufferLen, data + (len - left), toBuff); memcpy(_buffer + _bufferLen, data + (len - left), toBuff);