Crash while calling Aws::Iot::MqttClientConnectionConfigBuilder.build()

[Mortaza9]

hi all,

i am getting cross this problem when i try to create an mqtt connection with some key, certificate and an endpoint that i get from provisioning in a previous step, when the i call for Aws::Iot::MqttClientConnectionConfigBuilder.build() to create the connection config, the binary crashes with:

free(): invalid pointer
[INFO] [2022-07-13T08:25:48Z] [00007f7c560cc800] [event-loop] - id=0x555d59343da0: Initializing edge-triggered epoll
[INFO] [2022-07-13T08:25:48Z] [00007f7c560cc800] [event-loop] - id=0x555d59343da0: Using eventfd for cross-thread notifications.
[TRACE] [2022-07-13T08:25:48Z] [00007f7c560cc800] [event-loop] - id=0x555d59343da0: eventfd descriptor 5.
[INFO] [2022-07-13T08:25:48Z] [00007f7c560cc800] [event-loop] - id=0x555d59343da0: Starting event-loop thread.
[INFO] [2022-07-13T08:25:48Z] [00007f7c560cc800] [dns] - id=0x555d593642a0: Initializing default host resolver with 1 max host entries.
[INFO] [2022-07-13T08:25:48Z] [00007f7c560cc800] [channel-bootstrap] - id=0x555d59366550: Initializing client bootstrap with event-loop group 0x555d59365820
[DEBUG] [2022-07-13T08:25:48Z] [00007f7c560cc800] [mqtt-client] - client=0x555d593665c0: Initalizing MQTT client
[DEBUG] [2022-07-13T08:25:48Z] [00007f7c560cc800] [tls-handler] - ctx: Certificate and key have been set, setting them up now.
[INFO] [2022-07-13T08:25:48Z] [00007f7c558c8640] [event-loop] - id=0x555d59343da0: main loop started
[TRACE] [2022-07-13T08:25:48Z] [00007f7c558c8640] [event-loop] - id=0x555d59343da0: subscribing to events on fd 5
[INFO] [2022-07-13T08:25:48Z] [00007f7c558c8640] [event-loop] - id=0x555d59343da0: default timeout 100000, and max events to process per tick 100
[TRACE] [2022-07-13T08:25:48Z] [00007f7c558c8640] [event-loop] - id=0x555d59343da0: waiting for a maximum of 100000 ms
Aborted (core dumped)

after some debugging the binary crashes on :
https://github.com/aws/s2n-tls/blob/8314a96de0c33a426ae877856a8a1a431d354e0d/crypto/s2n_certificate.c#L310

i did not really understand why, more over i saw some double freeing in :
https://github.com/aws/s2n-tls/blob/8314a96de0c33a426ae877856a8a1a431d354e0d/crypto/s2n_certificate.c#L317
that could cause a crash (may be) :).

i am compiling the sdk for x86 architecture and using the following flags: -DOPENSSL_NO_ASM=TRUE -DBUILD_SHARED_LIBS=ON

may be i am missing some thing, any help would be appreciated on how can i solve that.
thank you

[bretambrose]

I would open an issue or discussion with https://github.com/aws/s2n-tls

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