Having malloc(): corrupted top size issue - c

Question

I am trying to write code to test the speed of lz4 compression instead of using -b code in terminal.
I am using ubuntu Ubuntu 20.04.2 LTS. And visual studio ide.
Here is my code, it has some trouble when running the second time of the for loop in main.
This line:
fread(src,16384,1,fc);
When i = 1, it works as I expected. However, when i = 2, the malloc() problem just pop up.
//The split file function works perfectly.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "lz4.h"
int splitFile(char* fileIn, size_t maxSize);
#include "lz4.c"
int main()
{
time_t start,end;
int compress, decompress;
int64_t num_f=0;
int64_t i;
char* src=malloc(16384);
int srcSize= 16385;//(int)(strlen(src) + 1);
int dstCapacity=0;
int compressed_data_size=0;
char* compressed_data = malloc((size_t)dstCapacity);
char buff[200];
FILE * fc;
num_f = splitFile("/home/ziruo/research/1stpro/test.txt",16384);
printf("num_f=%ld\n",num_f);
start = time(NULL);
for( i = 1; i <= num_f; i++)
{
sprintf(buff,"/home/ziruo/research/1stpro/test.txt.%03d",i);
printf("buff %s\n",&buff);
if (compressed_data == NULL)
{
printf("faild to generae storage\n");
}
fc = fopen(buff,"r");
printf("fc is: %d\n",fc);
fread(src,16384,1,fc);
srcSize=(int)(strlen(src) + 1);
dstCapacity= LZ4_compressBound(srcSize)
compressed_data_size = LZ4_compress_default(src,compressed_data,srcSize,dstCapacity);
LZ4_compress_default(src,compressed_data,srcSize,dstCapacity);
printf("data size ratio %.2f\n", (float)compressed_data_size/srcSize);
}
end = time(NULL);
printf("time used(s): %f\n",difftime(end,start));
return 0;
}
int splitFile(char* fileIn, size_t maxSize)
{
int result = 0;
FILE* fIn;
FILE* fOut;
char buffer[1024 * 16];
size_t size;
size_t read;
size_t written;
if ((fileIn != NULL) && (maxSize > 0))
{
fIn = fopen(fileIn, "rb");
if (fIn != NULL)
{
fOut = NULL;
result = 1; // we have at least one part
while (!feof(fIn))
{
// initialize (next) output file if no output file opened
if (fOut == NULL)
{
sprintf(buffer, "%s.%03d", fileIn, result);
fOut = fopen(buffer, "wb");
if (fOut == NULL)
{
result = -1;
break;
}
size = 0;
}
// calculate size of data to be read from input file in order to not exceed maxSize
read = sizeof(buffer);
if ((size + read) > maxSize)
{
read = maxSize - size;
}
// read data from input file
read = fread(buffer, 1, read, fIn);
if (read == 0)
{
result = -1;
break;
}
// write data to output file
written = fwrite(buffer, 1, read, fOut);
if (written != read)
{
result = -1;
break;
}
// update size counter of current output file
size += written;
if (size >= maxSize) // next split?
{
fclose(fOut);
fOut = NULL;
result++;
}
}
// clean up
if (fOut != NULL)
{
fclose(fOut);
}
fclose(fIn);
}
}
return (result);
}
And here is the picture of error
enter image description here