Creating a three dimensional struct array on the heap in c - c

Question

I am trying to create a three dimensional struct array using malloc in c on MSVC. It compiles without error but when i debug it it gives an error after initializing some elements.
declaration:
typedef struct table_info
{
unsigned long size;
char code[33];
char path[300];
}table_info;
table is a global variable and is defined as:
struct table_info ***table=NULL;
malloc and initialize table:
char garb[33] = { '\0' };
char garb_path[300] = { '\0' };
table = (table_info***)malloc(ROWS* sizeof(**table));
for (int m = 0; m < ROWS; m++)
{
table[m] = (table_info**)malloc(COLS* sizeof(*table[m]));
for (int j = 0; j < COLS; ++j)
{
table[m][j] = (table_info*)malloc(DEPTH * sizeof(table[m][j]));
for (int k = 0; k < DEPTH; ++k)
{
table[m][j][k].size = 0;
strcpy_s(table[m][j][k].code, sizeof(table[m][j][k].code), garb);
memcpy(table[m][j][k].path, garb_path, sizeof(garb_path));
}
}
}
Am I initializing it correctly? or what should I correct to make it work?

Answer 1

The size passed to malloc is incorrect in the following line:
table[m][j] = (table_info*)malloc(DEPTH * sizeof(table[m][j]));
sizeof(table[m][j]) is just sizeof(**table), which is sizeof(table_info *). It should be sizeof(table_info), or alternatively sizeof(*table_info[m][j]) or sizeof(***table_info).
You also don't need to cast the result of malloc, which is generally frowned upon today (at least in C). See this post for more info.
So the following should work (in C):
table[m][j] = malloc(DEPTH * sizeof(*table[m][j]));