decode_ssl_received_bytes: Conditional jump or move depends on uninitialised value

[alepez]

Hi,
I've just hit this error. I'm using valgrind to debug memory access. I'm using https://github.com/Azure/azure-event-hubs-c that depends on this project (https://github.com/Azure/azure-uamqp-).

Valgrind finds an error: "Conditional jump or move depends on uninitialised value(s) ". This is the backtrace:

==29644== Conditional jump or move depends on uninitialised value(s)
==29644==    at 0x4C2AB2D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==29644==    by 0x49A07D: frame_codec_receive_bytes (in _omitted_binary_name_)
==29644==    by 0x496BF1: connection_byte_received (in _omitted_binary_name_)
==29644==    by 0x496CA3: connection_on_bytes_received (in _omitted_binary_name_)
==29644==    by 0x4A3512: on_underlying_io_bytes_received (in _omitted_binary_name_)
==29644==    by 0x4BB1CD: decode_ssl_received_bytes (in _omitted_binary_name_)
==29644==    by 0x4BB28A: on_underlying_io_bytes_received (in _omitted_binary_name_)
==29644==    by 0x4C0957: socketio_dowork (in _omitted_binary_name_)
==29644==    by 0x4B2689: xio_dowork (in _omitted_binary_name_)
==29644==    by 0x4BC521: tlsio_openssl_dowork (in _omitted_binary_name_)
==29644==    by 0x4B2689: xio_dowork (in _omitted_binary_name_)
==29644==    by 0x4A4F42: saslclientio_dowork (in _omitted_binary_name_)
==29644==    by 0x4B2689: xio_dowork (in _omitted_binary_name_)
==29644==    by 0x4990B0: connection_dowork (in _omitted_binary_name_)
==29644==    by 0x470B01: EventHubClient_LL_DoWork (in _omitted_binary_name_)
==29644==    by 0x46B9FC: EventhubClientThread (in _omitted_binary_name_)
==29644==    by 0x4B9134: ThreadWrapper (in _omitted_binary_name_)
==29644==    by 0x567F183: start_thread (pthread_create.c:312)
==29644==    by 0x6630FFC: clone (clone.S:111)
==29644==  Uninitialised value was created by a stack allocation
==29644==    at 0x531EF77: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)

At this point I don't know if this is actually an issue. But it may be.

[dcristoloveanu]

Hi @alepez

Thanks for reporting this and sorry for the delay, I was out of office for the past days.
Which sample from the event hubs C SDK have you run, so that I make sure I repro the same?

At the moment I will assume it is the send sample and will try to repro with that.

Thanks,
/Dan