When i run below code, I got realloc error and process got aborted. I am trying to understand memory reallocation by expanding size at every iteration. Somehow it got failed and clueless how to resolve this issue. Need help in proceeding further.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct
{
    char **vector;
    int num_entries;
} str_vector_t;

void frame_objs(str_vector_t *sv)
{
    int max_objs = 5;
    int i_idx = 0;
    char path[40] = "Device.DeviceInfo.Process.";
    char obj[45] = {0};
    printf("sv:%p, sv->num_entries=%dn", sv, sv->num_entries);
    sv->vector = calloc(max_objs, sizeof(char *));
    sv->num_entries = max_objs;
    for (i_idx = 0; i_idx < max_objs; i_idx++) {
        memset(&obj, 0, sizeof(obj));
        snprintf(obj, sizeof(obj), "%s%d", path, i_idx+1);
        sv->vector[i_idx] = strdup(obj);
    }
}

int main()
{
    // Single pointer str vector as array
    str_vector_t *sv = NULL;
    int vendor_idx = 4;
    int idx = 0;

    //4 sets
    for (idx = 0; idx < vendor_idx; idx++) {
        sv = realloc(sv, idx+1 * sizeof(str_vector_t));
        if (sv) {
            memset(&sv[idx], 0, sizeof(str_vector_t));
            printf("idx:%d, sv:%pn", idx, sv);
            frame_objs(&sv[idx]);
        }
    }

    return 0;
}

Output:

$ ./a.out
idx:0, sv:0x55e1b29b02a0
sv:0x55e1b29b02a0, sv->num_entries=0
idx:1, sv:0x55e1b29b02a0
sv:0x55e1b29b02b0, sv->num_entries=0
realloc(): invalid next size
Aborted (core dumped)