fread原因信号含义：分段故障

Question

我想读取文件中的二进制文件，一个struct store，所以当我运行blow代码时，会导致“segment fault”。

FILE *fp2;

Segment *head = (Segment *)malloc(sizeof(Segment));
if ((fp2 = fopen("/home/zhangchengfei/workspace/test/test/1.1428340272.ram", "rb")) == NULL) {
    fprintf(stderr,"error to open\n");
   }

head->segleter = (Seglet *)malloc(sizeof(Seglet));
head->segleter->objector = (Object *)malloc(sizeof(Object));

int total = (sizeof(Seglet) + sizeof(Object)) + sizeof(Segment);
if (fread(head, total, 1, fp2) == 0) {
}
fclose(fp2);

当我在Segment *head = (Segment *)malloc(sizeof(Segment));后面fopen()订购时，就像下面一样，它神奇地过去了。我试了几次，但我没理由？