mbedTLS with dynamic memory

currently I was tring to implemente a custom HTTPs client to perform a POST over ESP32 with freeRTOS. I'm facing problems with mbedTLS with dynamic memory allocation. Let me explain, if I set the MAX_FRAGMENT_LENGTH to 8k IN and 4k OUT with STATIC, the POST is corretly executed. But if I switch to dynamic a crash occurs. I'have record some logs there, is there any way to solve this problem? The strange thing also is that this problem occurs only with POST, but not with a GET request. I'm using esp_http_client but I have also try others and the problem is still the same.

I attach also the code there. It seems to crash once the fetch_headers occurs.

esp_http_client_config_t post_config = {
.host = (char *)pvParameter,
.url = iothub_url,
.client_cert_pem = "",
.client_key_pem = "",
.transport_type = HTTP_TRANSPORT_OVER_SSL,
.timeout_ms = 60000, //60 minutes
.method = HTTP_METHOD_POST,
.event_handler = _http_event_handler,
.is_async = false,
.user_data = response_buffer, // Pass address of local buffer to get response
};
esp_http_client_handle_t iothub_client = esp_http_client_init(&post_config);



// STEP1
char post_data[512] = "content";
//esp_http_client_set_url(client, "https://myurl");
//esp_http_client_set_method(client, HTTP_METHOD_POST);
esp_http_client_set_header(iothub_client, "Content-Type", "application/json");
//esp_http_client_set_post_field(client, post_data, strlen(post_data));

/*Open client https and write headers*/
if(ESP_OK == esp_http_client_open(iothub_client, strlen(post_data)))
ESP_LOGW(TAG_LOG, "POST");

/*Write body*/
//esp_http_client_perform(client);
esp_http_client_write(iothub_client, post_data, strlen(post_data));
ESP_LOGI(TAG_LOG, "Post Body: %s", post_data);

/*Fetch response headers*/
int content_length = esp_http_client_fetch_headers(iothub_client);
//ESP_LOGI(TAG_LOG, "fetch_headers, content_length = %d", content_length);

int response_length = esp_http_client_get_content_length(iothub_client);
//ESP_LOGI(TAG_LOG, "content_length, %d", response_length);

/*Read data*/
//esp_http_client_read_response(client, response_buffer, 1024);
esp_http_client_read(iothub_client, response_buffer, response_length);

I (27765) mbedtls: ssl_tls.c:8203 => handshake

I (27765) mbedtls: ssl_cli.c:3785 client state: 0

I (27775) mbedtls: ssl_tls.c:2847 => flush output

I (27775) mbedtls: ssl_tls.c:2859 <= flush output

I (27785) mbedtls: ssl_cli.c:3785 client state: 1

I (27785) mbedtls: ssl_tls.c:2847 => flush output

I (27795) mbedtls: ssl_tls.c:2859 <= flush output

I (27795) mbedtls: ssl_cli.c:805 => write client hello

I (27805) mbedtls: ssl_tls.c:3286 => write handshake message

I (27805) mbedtls: ssl_tls.c:3445 => write record

I (27815) mbedtls: ssl_tls.c:2847 => flush output

I (27825) mbedtls: ssl_tls.c:2866 message length: 318, out_left: 318

I (27825) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 318 (-0xfffffec2)

I (27835) mbedtls: ssl_tls.c:2899 <= flush output

I (27845) mbedtls: ssl_tls.c:3578 <= write record

I (27845) mbedtls: ssl_tls.c:3422 <= write handshake message

I (27855) mbedtls: ssl_cli.c:1255 <= write client hello

I (27855) mbedtls: ssl_tls.c:2628 => fetch input

I (27865) mbedtls: ssl_tls.c:2789 in_left: 0, nb_want: 5

I (29815) mbedtls: ssl_tls.c:2813 in_left: 0, nb_want: 5

I (29815) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 5 (-0xfffffffb)

I (29815) mbedtls: ssl_tls.c:2834 <= fetch input

I (29825) mbedtls: ssl_cli.c:3785 client state: 2

I (29825) mbedtls: ssl_tls.c:2847 => flush output

I (29835) mbedtls: ssl_tls.c:2859 <= flush output

I (29835) mbedtls: ssl_cli.c:1684 => parse server hello

I (29845) mbedtls: ssl_tls.c:4419 => read record

I (29845) mbedtls: ssl_tls.c:2628 => fetch input

I (29855) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 5

I (29865) mbedtls: ssl_tls.c:2834 <= fetch input

I (29865) mbedtls: ssl_tls.c:2628 => fetch input

I (29875) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 3820

I (29875) mbedtls: ssl_tls.c:2813 in_left: 5, nb_want: 3820

I (29885) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 1419 (-0xfffffa75)

I (30865) mbedtls: ssl_tls.c:2813 in_left: 1424, nb_want: 3820

I (30865) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 1424 (-0xfffffa70)

I (34865) mbedtls: ssl_tls.c:2813 in_left: 2848, nb_want: 3820

I (34865) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 972 (-0xfffffc34)

I (34865) mbedtls: ssl_tls.c:2834 <= fetch input

I (34875) mbedtls: ssl_tls.c:4493 <= read record

I (34875) mbedtls: ssl_cli.c:2000 server hello, total extension length: 9

I (34885) mbedtls: ssl_cli.c:2200 <= parse server hello

I (34895) mbedtls: ssl_cli.c:3785 client state: 3

I (34895) mbedtls: ssl_tls.c:2847 => flush output

I (34905) mbedtls: ssl_tls.c:2859 <= flush output

I (34905) mbedtls: ssl_tls.c:5763 => parse certificate

I (34915) mbedtls: ssl_tls.c:4419 => read record

I (34915) mbedtls: ssl_tls.c:4493 <= read record

I (34935) mbedtls: ssl_tls.c:5971 <= parse certificate

I (34935) mbedtls: ssl_cli.c:3785 client state: 4

I (34935) mbedtls: ssl_tls.c:2847 => flush output

I (34945) mbedtls: ssl_tls.c:2859 <= flush output

I (34945) mbedtls: ssl_cli.c:2566 => parse server key exchange

I (34955) mbedtls: ssl_tls.c:4419 => read record

I (34955) mbedtls: ssl_tls.c:4493 <= read record

I (34965) mbedtls: ssl_cli.c:2268 ECDH curve: secp256r1

I (34975) mbedtls: ssl_cli.c:2507 Server used SignatureAlgorithm 1

I (34975) mbedtls: ssl_cli.c:2509 Server used HashAlgorithm 4

I (35005) mbedtls: ssl_cli.c:2926 <= parse server key exchange

I (35005) mbedtls: ssl_cli.c:3785 client state: 5

I (35005) mbedtls: ssl_tls.c:2847 => flush output

I (35015) mbedtls: ssl_tls.c:2859 <= flush output

I (35015) mbedtls: ssl_cli.c:2959 => parse certificate request

I (35025) mbedtls: ssl_tls.c:4419 => read record

I (35025) mbedtls: ssl_tls.c:4493 <= read record

I (35035) mbedtls: ssl_cli.c:3115 <= parse certificate request

I (35045) mbedtls: ssl_cli.c:3785 client state: 6

I (35045) mbedtls: ssl_tls.c:2847 => flush output

I (35055) mbedtls: ssl_tls.c:2859 <= flush output

I (35055) mbedtls: ssl_cli.c:3125 => parse server hello done

I (35065) mbedtls: ssl_tls.c:4419 => read record

I (35075) mbedtls: ssl_tls.c:4489 reuse previously read message

I (35075) mbedtls: ssl_tls.c:4493 <= read record

I (35085) mbedtls: ssl_cli.c:3155 <= parse server hello done

I (35085) mbedtls: ssl_cli.c:3785 client state: 7

I (35095) mbedtls: ssl_tls.c:2847 => flush output

I (35095) mbedtls: ssl_tls.c:2859 <= flush output

I (35105) mbedtls: ssl_tls.c:5437 => write certificate

I (35115) mbedtls: ssl_tls.c:5454 <= skip write certificate

I (35115) mbedtls: ssl_cli.c:3785 client state: 8

I (35125) mbedtls: ssl_tls.c:2847 => flush output

I (35125) mbedtls: ssl_tls.c:2859 <= flush output

I (35135) mbedtls: ssl_cli.c:3167 => write client key exchange

I (39375) mbedtls: ssl_tls.c:3286 => write handshake message

I (39375) mbedtls: ssl_tls.c:3445 => write record

I (39375) mbedtls: ssl_tls.c:2847 => flush output

I (39385) mbedtls: ssl_tls.c:2866 message length: 75, out_left: 75

I (39395) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 75 (-0xffffffb5)

I (39395) mbedtls: ssl_tls.c:2899 <= flush output

I (39405) mbedtls: ssl_tls.c:3578 <= write record

I (39405) mbedtls: ssl_tls.c:3422 <= write handshake message

I (39415) mbedtls: ssl_cli.c:3444 <= write client key exchange

I (39425) mbedtls: ssl_cli.c:3785 client state: 9

I (39425) mbedtls: ssl_tls.c:2847 => flush output

I (39435) mbedtls: ssl_tls.c:2859 <= flush output

I (39435) mbedtls: ssl_cli.c:3496 => write certificate verify

I (39445) mbedtls: ssl_tls.c:653 => derive keys

I (39455) mbedtls: ssl_tls.c:1228 => calc verify sha256

I (39455) mbedtls: ssl_tls.c:1234 <= calc verify

I (39465) mbedtls: ssl_tls.c:1139 <= derive keys

I (39465) mbedtls: ssl_cli.c:3525 <= skip write certificate verify

I (39475) mbedtls: ssl_cli.c:3785 client state: 10

I (39485) mbedtls: ssl_tls.c:2847 => flush output

I (39485) mbedtls: ssl_tls.c:2859 <= flush output

I (39495) mbedtls: ssl_tls.c:5987 => write change cipher spec

I (39495) mbedtls: ssl_tls.c:3286 => write handshake message

I (39505) mbedtls: ssl_tls.c:3445 => write record

I (39515) mbedtls: ssl_tls.c:2847 => flush output

I (39515) mbedtls: ssl_tls.c:2866 message length: 6, out_left: 6

I (39525) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 6 (-0xfffffffa)

I (39535) mbedtls: ssl_tls.c:2899 <= flush output

I (39535) mbedtls: ssl_tls.c:3578 <= write record

I (39545) mbedtls: ssl_tls.c:3422 <= write handshake message

I (39545) mbedtls: ssl_tls.c:6001 <= write change cipher spec

I (39555) mbedtls: ssl_cli.c:3785 client state: 11

I (39565) mbedtls: ssl_tls.c:2847 => flush output

I (39565) mbedtls: ssl_tls.c:2859 <= flush output

I (39575) mbedtls: ssl_tls.c:6515 => write finished

I (39575) mbedtls: ssl_tls.c:6331 => calc finished tls sha256

I (39585) mbedtls: ssl_tls.c:6361 <= calc finished

I (39585) mbedtls: ssl_tls.c:3286 => write handshake message

I (39595) mbedtls: ssl_tls.c:3445 => write record

I (39605) mbedtls: ssl_tls.c:1446 => encrypt buf

I (39605) mbedtls: ssl_tls.c:1780 <= encrypt buf

I (39615) mbedtls: ssl_tls.c:2847 => flush output

I (39615) mbedtls: ssl_tls.c:2866 message length: 85, out_left: 85

I (39625) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 85 (-0xffffffab)

I (39635) mbedtls: ssl_tls.c:2899 <= flush output

I (39635) mbedtls: ssl_tls.c:3578 <= write record

I (39645) mbedtls: ssl_tls.c:3422 <= write handshake message

I (39655) mbedtls: ssl_tls.c:6624 <= write finished

I (39655) mbedtls: ssl_tls.c:2628 => fetch input

I (39665) mbedtls: ssl_tls.c:2789 in_left: 0, nb_want: 5

I (41115) mbedtls: ssl_tls.c:2813 in_left: 0, nb_want: 5

I (41115) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 5 (-0xfffffffb)

I (41115) mbedtls: ssl_tls.c:2834 <= fetch input

I (41125) mbedtls: ssl_cli.c:3785 client state: 12

I (41125) mbedtls: ssl_tls.c:2847 => flush output

I (41135) mbedtls: ssl_tls.c:2859 <= flush output

I (41135) mbedtls: ssl_tls.c:6010 => parse change cipher spec

I (41145) mbedtls: ssl_tls.c:4419 => read record

I (41145) mbedtls: ssl_tls.c:2628 => fetch input

I (41155) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 5

I (41165) mbedtls: ssl_tls.c:2834 <= fetch input

I (41165) mbedtls: ssl_tls.c:2628 => fetch input

I (41175) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 6

I (41175) mbedtls: ssl_tls.c:2813 in_left: 5, nb_want: 6

I (41185) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 1 (-0xffffffff)

I (41195) mbedtls: ssl_tls.c:2834 <= fetch input

I (41195) mbedtls: ssl_tls.c:4493 <= read record

I (41205) mbedtls: ssl_tls.c:6074 <= parse change cipher spec

I (41205) mbedtls: ssl_tls.c:2628 => fetch input

I (41215) mbedtls: ssl_tls.c:2789 in_left: 0, nb_want: 5

I (41225) mbedtls: ssl_tls.c:2813 in_left: 0, nb_want: 5

I (41225) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 5 (-0xfffffffb)

I (41235) mbedtls: ssl_tls.c:2834 <= fetch input

I (41245) mbedtls: ssl_cli.c:3785 client state: 13

I (41245) mbedtls: ssl_tls.c:2847 => flush output

I (41255) mbedtls: ssl_tls.c:2859 <= flush output

I (41255) mbedtls: ssl_tls.c:6641 => parse finished

I (41265) mbedtls: ssl_tls.c:6331 => calc finished tls sha256

I (41275) mbedtls: ssl_tls.c:6361 <= calc finished

I (41275) mbedtls: ssl_tls.c:4419 => read record

I (41285) mbedtls: ssl_tls.c:2628 => fetch input

I (41285) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 5

I (41295) mbedtls: ssl_tls.c:2834 <= fetch input

I (41295) mbedtls: ssl_tls.c:2628 => fetch input

I (41305) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 85

I (41315) mbedtls: ssl_tls.c:2813 in_left: 5, nb_want: 85

I (41315) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 80 (-0xffffffb0)

I (41325) mbedtls: ssl_tls.c:2834 <= fetch input

I (41335) mbedtls: ssl_tls.c:1943 => decrypt buf

I (41335) mbedtls: ssl_tls.c:2468 <= decrypt buf

I (41345) mbedtls: ssl_tls.c:4493 <= read record

I (41345) mbedtls: ssl_tls.c:6709 <= parse finished

I (41355) mbedtls: ssl_cli.c:3785 client state: 14

I (41355) mbedtls: ssl_tls.c:2847 => flush output

I (41365) mbedtls: ssl_tls.c:2859 <= flush output

I (41365) mbedtls: ssl_cli.c:3896 handshake: done

I (41375) mbedtls: ssl_cli.c:3785 client state: 15

I (41385) mbedtls: ssl_tls.c:2847 => flush output

I (41385) mbedtls: ssl_tls.c:2859 <= flush output

I (41395) mbedtls: ssl_tls.c:8213 <= handshake

I (41395) 32|LOG_TASK: HTTP_EVENT_ON_CONNECTED
I (41405) mbedtls: ssl_tls.c:8805 => write

I (41405) mbedtls: ssl_tls.c:3445 => write record

I (41415) mbedtls: ssl_tls.c:1446 => encrypt buf

I (41415) mbedtls: ssl_tls.c:1780 <= encrypt buf

I (41425) mbedtls: ssl_tls.c:2847 => flush output

I (41425) mbedtls: ssl_tls.c:2866 message length: 293, out_left: 293

I (41435) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 293 (-0xfffffedb)

I (41445) mbedtls: ssl_tls.c:2899 <= flush output

I (41455) mbedtls: ssl_tls.c:3578 <= write record

I (41455) mbedtls: ssl_tls.c:8833 <= write

I (41465) 36|LOG_TASK: HTTP_EVENT_HEADER_SENT
W (41465) 146|LOG_TASK: POST
I (41475) mbedtls: ssl_tls.c:8805 => write

I (41475) mbedtls: ssl_tls.c:3445 => write record

I (41485) mbedtls: ssl_tls.c:1446 => encrypt buf

I (41485) mbedtls: ssl_tls.c:1780 <= encrypt buf

I (41495) mbedtls: ssl_tls.c:2847 => flush output

I (41495) mbedtls: ssl_tls.c:2866 message length: 85, out_left: 85

I (41505) mbedtls: ssl_tls.c:2871 ssl->f_send() returned 85 (-0xffffffab)

I (41515) mbedtls: ssl_tls.c:2899 <= flush output

I (41515) mbedtls: ssl_tls.c:3578 <= write record

I (41525) mbedtls: ssl_tls.c:8833 <= write

I (41525) 151|LOG_TASK: Post Body: {"blobName":"test9.log"}
I (42615) mbedtls: ssl_tls.c:2628 => fetch input

I (42615) mbedtls: ssl_tls.c:2789 in_left: 0, nb_want: 5

I (42615) mbedtls: ssl_tls.c:2813 in_left: 0, nb_want: 5

I (42615) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 5 (-0xfffffffb)

I (42625) mbedtls: ssl_tls.c:2834 <= fetch input

I (42635) mbedtls: ssl_tls.c:8389 => read

I (42635) mbedtls: ssl_tls.c:4419 => read record

I (42645) mbedtls: ssl_tls.c:2628 => fetch input

I (42645) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 5

I (42655) mbedtls: ssl_tls.c:2834 <= fetch input

I (42655) mbedtls: ssl_tls.c:2628 => fetch input

I (42665) mbedtls: ssl_tls.c:2789 in_left: 5, nb_want: 69

I (42675) mbedtls: ssl_tls.c:2813 in_left: 5, nb_want: 69

I (42675) mbedtls: ssl_tls.c:2814 ssl->f_recv(_timeout)() returned 64 (-0xffffffc0)

I (42685) mbedtls: ssl_tls.c:2834 <= fetch input

I (42695) mbedtls: ssl_tls.c:1943 => decrypt buf

I (42695) mbedtls: ssl_tls.c:2468 <= decrypt buf

I (42705) mbedtls: ssl_tls.c:4493 <= read record

W (42705) mbedtls: ssl_tls.c:8476 received handshake message

I (42715) mbedtls: ssl_tls.c:5358 => send alert message

I (42725) mbedtls: ssl_tls.c:3445 => write record

I (42725) mbedtls: ssl_tls.c:1446 => encrypt buf

Guru Meditation Error: Core 0 panic'ed (StoreProhibited). Exception was unhandled.

Core 0 register dump:
PC : 0x4000c2e4 PS : 0x00060230 A0 : 0x801083fd A1 : 0x3ffdc4d0
A2 : 0x00000000 A3 : 0x3ffe8d84 A4 : 0x00000010 A5 : 0x00000000
A6 : 0x1f8d8194 A7 : 0xe0852eec A8 : 0x00000000 A9 : 0x3ffdc450
A10 : 0x00000000 A11 : 0x607faa5d A12 : 0x607faa5d A13 : 0x3ffbfeac
A14 : 0x00000000 A15 : 0x3ffddcec SAR : 0x00000010 EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000

Backtrace:0x4000c2e1:0x3ffdc4d0 0x401083fa:0x3ffdc4e0 0x40109514:0x3ffdc580 0x4010afff:0x3ffdc5b0 0x4010b570:0x3ffdc5d0 0x400ff815:0x3ffdc5f0 0x40123590:0x3ffdc610 0x4013b967:0x3ffdc630 0x401002e0:0x3ffdc650 0x400dca9d:0x3ffdc670