Flash reading cause MCU reset

[pml1hc]

Hello all, I'm using RTOS_SDK.

I'm trying to read 1239 bytes from flash. But after read, MCU is reset.
So does anyone had facing with this problem.
I try to using both pointer and array but the same problem.

Please help me.

My code:

spi_flash_read(0x92000, &u32AtCertsLength, sizeof(uint32));
unsigned char *uint8AtCertbuf2 = (unsigned char*)malloc(u32AtCertsLength);
readATCertfromFlash(0x92000, uint8AtCertbuf2, u32AtCertsLength);

I'm using nodeMCU 32Mbit with memory layout was set 1024+1024 for allow OTA

[pml1hc]

Hello, Any help?