重新分配错误：释放对象的校验和不正确

size_t bufSize = 1024;
unsigned char *msg = NULL;
size_t msgBytes = 0;
size_t inputMsgBufCount = 0;
unsigned char inputBuffer[bufSize];
size_t bytesRead = 0;
unsigned char *tmp = NULL;

if ((msg = (unsigned char *)malloc(sizeof(unsigned char) * bufSize)) == NULL)
    exit(EXIT_FAILURE);
bytesRead = fread(msg, sizeof(unsigned char) * bufSize, 1, stdin);
inputMsgBufCount++;

while (bytesRead) {
    printf(\"iteration: %lu\\n\", inputMsgBufCount);
    if ( (tmp = (unsigned char *)realloc(msg, (inputMsgBufCount * bufSize) + bufSize)) != NULL ) {
         printf(\"reallocated\\n\");
        msg = tmp;
        inputMsgBufCount++;
    }
    else {
        printf(\"Ran out of memory\\n\");
        free(msg);
    }
    bytesRead = fread(inputBuffer, sizeof(unsigned char) * bufSize, 1, stdin);
    memmove((msg + (inputMsgBufCount * bufSize)), inputBuffer, bufSize);
}

free(msg);

msgBytes = (inputMsgBufCount * bufSize);

gettimeofday(&end, NULL);
printf(\"%10.6lf [MB/s]\\n\", (msgBytes / (1<<20)) / ( (end.tv_sec - start.tv_sec) + (end.tv_usec - start.tv_usec) * 1.0e-6f ));