Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: ESP-01
• Core Version: 3.0.0
• Development Env: Arduino IDE
• Operating System: Windows

Settings in IDE

• Module: Generic ESP8266 Module
• Flash Mode: dio
• Flash Size: 1M
• lwip Variant: v2 Lower Memory
• Reset Method: ck
• Flash Frequency: 40Mhz
• CPU Frequency: 80Mhz
• Upload Using: SERIAL
• Upload Speed: 115200

Problem Description

Immediately after connecting to a WPA2 Enterprise encrypted network I receive an exception. This seems to be related to the way free is called from a function in eap.c (which seems to be part of the SDK). I am not sure if this is a bug here or in the SDK, but apparently an address that is unmapped was passed to free. I am not sure if maybe the stack got corrupted somewhere as that function hierarchy doesn't really make sense to me.....

I have everything working on the super old version 2.3.0 (which uses completely different functions for setting WPA Enterprise up) but I want to update.

I have reproduced this on all Espressif Firmware Versions that are available.

MCVE Sketch

void setup() {

	Serial.begin(115200);
	Serial.println("Startup!");

	Serial.print("Heap Free: ");
	Serial.println(system_get_free_heap_size());

	enableWiFiAtBootTime();

	wifi_set_opmode_current(STATION_MODE);

	struct station_config wifi_config;

	memset(&wifi_config, 0, sizeof(wifi_config));
	strcpy((char*)wifi_config.ssid, ssid);
	wifi_station_set_config_current(&wifi_config);

	wifi_station_set_wpa2_enterprise_auth(1);

	wifi_station_set_enterprise_identity((uint8_t*)identity, strlen(identity));
	wifi_station_set_enterprise_cert_key(esp_cert_pem, esp_cert_pem_len, esp_key_pem, esp_key_pem_len, NULL, 1);

	wifi_station_disconnect();
	wifi_station_connect();

	Serial.println(F("Waiting for connection..."));


	while (WiFi.status() != WL_CONNECTED) {
		if (millis() > 60000) {
			Serial.println(F("Took wayyy to long. Restarting..."));
			ESP.restart();
		}

		delay(1000);
	}
}

void loop() {
         Serial.println("Connected!");
}

Debug Messages

No poison after block at: 0x406e4a2f, actual data: 0x0 0x0 0x80 0x0

User exception (panic/abort/assert)
--------------- CUT HERE FOR EXCEPTION DECODER ---------------

 Error
   :?:::0x4024b080:etharp_output
   :?:::0x40201a52:raise_exception
   :?:::0x40201aaf:__panic_func
   0x40100e54 get_unpoisoned_check_neighbors
   0x401012f2 umm_free
   :\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266\umm_malloc/umm_malloc.cpp:574
   0x4010130d umm_poison_free_fl
   :?:::0x4024c4e0:etharp_output
   :?:::0x40229979:wpa_set_bss
   0x40100827 HeapSelectDram
   :\packages\esp8266\hardware\esp8266\3.0.0\cores\esp8266/heap.cpp:370
   :?:::0x4022aac7:wpabuf_free
   :?:::0x4022bb92:wpa2_sm_rx_eapol
   :?:::0x4022bba6:wpa2_sm_rx_eapol
   :?:::0x4022bbe1:wpa2_sm_rx_eapol
   :?:::0x4022b7ac:wpa2_sm_rx_eapol
   :?:::0x40223129:sta_input
   :?:::0x40240ccf:pp_tx_idle_timeout
   :?:::0x4024058f:ppPeocessRxPktHdr
   : ?? ??:0
   : ?? ??:0
   :?:::0x40105b88:call_user_start_local
   :?:::0x40105b8e:call_user_start_local
   :?:::0x4010000d:call_user_start
   0x40235458 cont_ret
   0x40235411 cont_continue