large data trigger watchdog reset

[lable]

use following code：
if (pub.has_stream()) {
uint8_t buf[BUFFER_SIZE];
int read;

  while (read = pub.payload_stream()->read(buf, BUFFER_SIZE)) {
    Serial.write(buf, read);
  }
  pub.payload_stream()->stop();

Soft WDT reset

ctx: cont
sp: 3fff0340 end: 3fff0670 offset: 01b0

stack>>>
3fff04f0: 3ffef55c 00000165 00000165 4020bb50
3fff0500: 3ffef55c 0000015a 3ffef420 4020919a
3fff0510: 00000004 3ffef420 3ffef650 3ffef420
3fff0520: 00000004 00000005 4020b510 00000005
3fff0530: 00000004 3ffef420 3ffef420 402093f4
3fff0540: 0000004a 3ffef420 3fff1964 40209466
3fff0550: 00000030 3fff061c 00000000 00000001
3fff0560: 3ffef420 3fff05e0 00000001 40209551
3fff0570: 00000000 00000005 00000000 4020aaf7
3fff0580: 00000030 3fff061c 3fff0604 3ffef640
3fff0590: 3fff05e0 3ffef420 00000001 40209806
3fff05a0: 3ffeee00 3ffef4bc 3fff05e0 4020b448
3fff05b0: 3fffdad0 3ffef584 3fff061c 40208cdd
3fff05c0: 3ffe87d1 00000064 00000005 3ffef640
3fff05d0: 3fffdad0 3ffef584 00000005 402026d1
3fff05e0: 3ffe9008 00000003 0004f404 40202101
3fff05f0: 00000000 3ffeedd8 3ffef420 00000000
3fff0600: 4010527c 3fff17cc 0000001f 0000001e
3fff0610: 3fff1934 00000026 00000001 3fff1794
3fff0620: 0000002f 00000026 3fff176c 0000001f
3fff0630: 0000001e 00040410 00000001 3ffef640
3fff0640: 3fffdad0 00000000 3ffef638 4020272a
3fff0650: 3fffdad0 00000000 3ffef638 4020b55c
3fff0660: feefeffe feefeffe 3ffef650 40100718
<<<stack<<<

try:

if (pub.has_stream()) {
  uint8_t buf[BUFFER_SIZE];
  int read;

  /*
   * 尝试解决mqtt大数据包下,重启问题
   */
  //wifi_set_sleep_type(NONE_SLEEP_T);
  //cli(); //IRQ Disable
  //wdt_disable();


  while (read = pub.payload_stream()->read(buf, BUFFER_SIZE)) {
    //delay(1);
    yield();
    wdt_reset();
    while(!Serial.availableForWrite());
    {
      yield();
    }
    Serial.write(buf, read);

    //delay(1);


  }
  pub.payload_stream()->stop();

can't solve the problem。