stutter_libFuzzer_and_AFL.c

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

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
    uint32_t *num = (uint32_t *)Data;
    if (Size < sizeof(uint32_t) * 2)
        return 0;
    //num[0] = 0x00621a27u; num[1] = 0x00c01752u;
    if (num[0] > 0x003e9ef4u && num[0] < 0x00649689u) {
        if (num[1] > 0x00b10797u && num[1] < 0x00f2deebu) {
            if ((num[0] * num[1]) == 0x00621a27u * 0x00c01752u) {
                *((volatile uint8_t *)0) = 0;
            }
        }
    }
    return 0;
}

__attribute__((weak))
int main(int argc, char **argv) {
    if (argc != 2) {
        printf("%s <test case path>\n", argv[0]);
        return -1;
    }
    FILE *fp = NULL;
    fp = fopen(argv[1], "r");
    if (fp == NULL) {
        printf("fopen %s failed\n", argv[1]);
        return -1;
    }
    if (fseek(fp, 0, SEEK_END) != 0) {
        printf("fseek failed\n");
        fclose(fp);
        return -1;
    }
    long size = ftell(fp);
    if (size < 0) {
        printf("ftell failed\n");
        fclose(fp);
        return -1;
    }
    rewind(fp);
    uint8_t *data = (uint8_t *)malloc(size);
    if (data == NULL) {
        printf("oom\n");
        fclose(fp);
        return -1;
    }
    if (fread(data, size, 1, fp) != 1) {
        printf("fread failed\n");
        free(data);
        fclose(fp);
        return -1;
    }
    fclose(fp);
    LLVMFuzzerTestOneInput(data, size);
    free(data);
    return 0;
}