[gnutls-devel] GnuTLS | gnutls-serv --echo exits when a message is received (#959)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Tue Mar 24 11:24:28 CET 2020

Anderson Sasaki created an issue: https://gitlab.com/gnutls/gnutls/-/issues/959

## Description of problem:
The bug was initially reported in https://bugzilla.redhat.com/show_bug.cgi?id=1816583

When ``gnutls-serv`` is executed with the ``--echo`` option, it exits when a message to be echoed is received. It outputs
Memory error

## Version of gnutls used:

## Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)
Fedora 32

## How reproducible:

Steps to Reproduce:
 * Generate server private key and certificate
 * Run the server with ``--echo`` option. For example:
$ gnutls-serv --echo --x509certfile=cert.pem --x509keyfile=key.pem -p 4433
 * Connect using a client and send a message to be echoed. For example, run:
$ gnutls-cli --insecure localhost:4433
Type the message to be echoed.

## Actual results:
Server closes connection and outputs:
Memory error

## Expected results:
Server sends a copy of the received message to the client without closing the connection.

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