flash_img_buffered_write throws (load prohibited) when using CONFIG_IMG_ERASE_PROGRESSIVELY

[laurin]

I am using lwm2m to upload a firmware image to the flash of my esp32s3_devkitm, using the flash_img_buffered_write function.
The update works perfectly, but if I activate CONFIG_IMG_ERASE_PROGRESSIVELY, the following exception is thrown when the program starts to write the image to the flash.

E:  ** FATAL EXCEPTION
E:  ** CPU 0 EXCCAUSE 28 (load prohibited)
E:  **  PC 0x42024c3f VADDR 0x8
0x42024c3f: flash_img_buffered_write at ~/zephyrproject/zephyr/subsys/dfu/img_util/flash_img.c:57

E:  **  PS 0x60720
E:  **    (INTLEVEL:0 EXCM: 0 UM:1 RING:0 WOE:1 OWB:7 CALLINC:2)
E:  **  A0 0x8202328d  SP 0x3fca1770  A2 0x3fc954dc  A3 0
E:  **  A4 0  A5 0x1  A6 0x3fc954e0  A7 0x8
E:  **  A8 0x82024c36  A9 0x3fca1740 A10 0 A11 0x200
E:  ** A12 0x200 A13 0x1 A14 0 A15 0x400
E:  ** LBEG 0x40056fc5 LEND 0x40056fe7 LCOUNT 0xffffffff
E:  ** SAR 0x8
E: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
E: Current thread: 0x3fc8ee68 (lwm2m-sock-recv)
E: Halting system

The line 57 in flash_img.c is executing the call to the boot_get_trailer_status_offset function.
Does someone know what the problem might be here?

---

initializing flash image context

#define SLOT1_PARTITION slot1_partition
#define SLOT1_PARTITION_ID FIXED_PARTITION_ID(SLOT1_PARTITION)

struct flash_img_context fwu_flash_img_ctx;

int fwu_init()
{
    int ret = flash_img_init_id(&fwu_flash_img_ctx, SLOT1_PARTITION_ID);
    if (ret)
    {
        LOG_ERR("flash img init failed (%d)", ret);
        return ret;
    }

    LOG_INF("initialized fwu img context");
    return 0;
}

writing to image

void fwu_write_block(const uint8_t *data, size_t len)
{
    int ret = flash_img_buffered_write(&fwu_flash_img_ctx, data, len, true);
    if (ret)
    {
        LOG_ERR("img write block failed (%d)", ret);
    }
}