Fix crash in WiFiClient when read() called after stop() #5197
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Thi may happen if read() gets called repeatedly (such as in HttpClient to parse response headers) and the connection is closed unexpectedly or the remote peer may have unexpected behavior that causes the underlying socket to report an error. In that case read() itself calls stop(), which invalidates the receive buffer object. Then when read() is called again without checking, such as inside readStringUntil(), the _rxBuffer is null and ESP32 crashes.
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thanks :) |
This was referenced Jul 20, 2021
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Thi may happen if
read()gets called repeatedly (such as inHttpClientto parse response headers) and the connection is closed unexpectedly or the remote peer may have unexpected behavior that causes the underlying socket to report an error. In that caseread()itself callsstop(), which invalidates the receive buffer object. Then whenread()is called again without checking, such as insidereadStringUntil(), the_rxBufferis null and ESP32 crashes.See also #3659