mem_free: illegal memory: non-linked: double free" failed at line 661 in /Third_Party/LwIP/src/core/mem.c

leadercxn

想请教下我的程序产生这样的内存出错。语义上是说我释放了两次内存，但是我是alloc的方式申请内存的。所以，不jie...

leadercxn

自己来结贴吧：
#define TCP_MSS                         636
增大这个参数就行

leadercxn

struct pbuf * p = NULL;

    uint8_t buff_ack[12] = {0};
    int buff_index = 0;

    memset(&buff_ack, 0, sizeof(buff_ack));

    // 填充TX_ACK 头
    buff_ack[buff_index++] = PROTOCOL_VERSION;
    uint16_encode(token, buff_ack + buff_index);
    buff_index += 2;
    buff_ack[buff_index++] = PKT_TX_ACK;
    memcpy(buff_ack + buff_index, p_param->eui, 8);
    buff_index += 8;

    trace_infoln("pull_rack %d, %04X", p_param->port, token);

    p = pbuf_alloc(PBUF_TRANSPORT, buff_index, PBUF_POOL);
    if(p == NULL)
    {
        trace_errorln("pbuf_alloc error");
        return ERR_MEM;
    }

    pbuf_take(p, (char *)buff_ack, buff_index);
    udp_send(p_param->upcb_down, p);
    pbuf_free(p);

正点原子

帮顶

阿侑kevin

还有一句不解，memset(&buff_ack, 0, sizeof(buff_ack));，这句没问题？