memset large memory appear stack message

[lispread]

log message：
[UNISOC] [WRN] main: �[0;33mUnisoc fdl 0x11�[0m
do_download:enter
1 is 2 is 104720two is 104720three is 0four is 104720two is 108734three is 1four is 108734two is 10c748***** USAGE FAULT *****
Executing thread ID (thread): 0x00110c88
Faulting instruction address: 0x0
Illegal use of the EPSR
Fatal fault in essential thread! Spinning...

code ：
for (i = 0; i < PACKET_MAX_NUM; i++) {
printf("two is %x", &packet[i]);
memset (&packet[i], 0, sizeof (dl_packet_t));
printf("three is %x", i);
packet[i].next = &packet[i+1];
printf("four is %x", &packet[i]);
}
dl_packet_t size 16K

[bublover]

Enable CONFIG_INIT_STACKS=y
and then use the STACK_ANALYZE() macro to get the thread stack usage.