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Avoid copying past end of buffer in String.concat (#8198)

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This commit is contained in:
Paulo Cabral Sanz
2021-07-08 20:35:09 -03:00
committed by GitHub
parent a105bdd359
commit 2946ce055c
2 changed files with 11 additions and 1 deletions
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2
cores/esp8266/WString.cpp
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@ -305,7 +305,7 @@ bool String::concat(const char *cstr, unsigned int length) {
return true;
if (!reserve(newlen))
return false;
memmove_P(wbuffer() + len(), cstr, length + 1);
memmove_P(wbuffer() + len(), cstr, length);
setLen(newlen);
wbuffer()[newlen] = 0;
return true;