MPI и переменные перезаписывают?

Я пытаюсь запустить распространяемое приложение, которое используется для расчета ключевого соглашения burmester desmedt .

Код, который делает это, следующий:

#include "mpi.h"
#include <stdio.h>

// Openssl
#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/err.h>

// Custom
#include "message.h"
#include "dh.h"

void cleanup(DH *secret);

void cleanup(DH *secret) {
  EVP_cleanup();
  CRYPTO_cleanup_all_ex_data();
  OPENSSL_free(secret);
  ERR_free_strings();
}

int main(int argc, char *argv[]) {
  int rank, size;


  MPI_Init( &argc, &argv );
  MPI_Comm_rank( MPI_COMM_WORLD, &rank );
  MPI_Comm_size( MPI_COMM_WORLD, &size );

  /* Load the human readable error strings for libcrypto */
  ERR_load_crypto_strings();
  /* Load all digest and cipher algorithms */
  OpenSSL_add_all_algorithms();
  /* Load config file, and other important initialisation */
  OPENSSL_config(NULL);

  DH *secret;

  printf("RANK %d, Generating Diffie Hellman Keys\n", rank);
  fflush(stdout);
  if(-1 == generateKeys(secret)) {
    cleanup(secret);
    fprintf(stderr, "RANK %d, Failed to intialize key\n",rank);
    fflush(stderr);
    return -1;
  }

  printf("RANK %d, Keys generated\n",rank);
  fflush(stdout);

  // Set up Barrier for cpommunications
  MPI_Barrier(MPI_COMM_WORLD);

  printf("RANK %d, Publishing Keys\n", rank);
  fflush(stdout);

  if(secret == NULL) {
    cleanup(secret);
    fprintf(stderr, "RANK %d, Error on Generating the Diffie Hellman\n",rank);
    fflush(stderr);
    return -1;
  }

  if(MPIbcastBigNum(secret->pub_key, rank, "Publishing Public Key") == -1){
   cleanup(secret);
   return -1;
  }

  /*Cleanup */
  cleanup(secret);
  MPI_Finalize();
  return 0;
}

И есть вспомогательные методы для инициализации DH и обмена сообщениями (для экономии места я публикую код по ссылкам):

• Диффи Хеллман: https://github.com/pc-magas/burmester-desmedt/blob/master/dh.c
• Обмен сообщениями: https://github.com/pc-magas/burmester-desmedt/blob/master/message.c

Также я компилирую его с помощью этого Makefile. Итак, я хочу знать, почему следующее выполнение превращается в segfault?

mpirun -np 3 ./builds/main
RANK 1, Generating Diffie Hellman Keys
RANK 2, Generating Diffie Hellman Keys
RANK 0, Generating Diffie Hellman Keys
RANK 1, Keys generated
RANK 2, Keys generated
RANK 0, Keys generated
RANK 2, Publishing Keys
[pcmagas-System-Product-Name:19304] *** Process received signal ***
[pcmagas-System-Product-Name:19304] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19304] Signal code:  (128)
[pcmagas-System-Product-Name:19304] Failing at address: (nil)
[pcmagas-System-Product-Name:19304] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f485819c390]
[pcmagas-System-Product-Name:19304] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7f485873acfd]
[pcmagas-System-Product-Name:19304] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19304] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19304] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f4857de1830]
[pcmagas-System-Product-Name:19304] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19304] *** End of error message ***
RANK 1, Publishing Keys
[pcmagas-System-Product-Name:19303] *** Process received signal ***
[pcmagas-System-Product-Name:19303] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19303] Signal code:  (128)
[pcmagas-System-Product-Name:19303] Failing at address: (nil)
[pcmagas-System-Product-Name:19303] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f2e56b90390]
[pcmagas-System-Product-Name:19303] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7f2e5712ecfd]
[pcmagas-System-Product-Name:19303] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19303] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19303] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f2e567d5830]
[pcmagas-System-Product-Name:19303] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19303] *** End of error message ***
RANK 0, Publishing Keys
[pcmagas-System-Product-Name:19302] *** Process received signal ***
[pcmagas-System-Product-Name:19302] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19302] Signal code:  (128)
[pcmagas-System-Product-Name:19302] Failing at address: (nil)
[pcmagas-System-Product-Name:19302] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fd967a55390]
[pcmagas-System-Product-Name:19302] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7fd967ff3cfd]
[pcmagas-System-Product-Name:19302] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19302] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19302] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fd96769a830]
[pcmagas-System-Product-Name:19302] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19302] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 19304 on node pcmagas-System-Product-Name exited on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
Makefile:16: recipe for target 'run' failed
make: *** [run] Error 139

Перезаписан ли объект DH (насколько я знаю, OpenSSL не безопасен для потоков и процессов, и я пытаюсь запустить его через отдельные процессы).