OTA Image load crash - Guru meditation error

ivan.khikhol
Posts: 2
Joined: Tue Oct 06, 2020 7:04 am

OTA Image load crash - Guru meditation error

Postby ivan.khikhol » Tue Oct 06, 2020 7:15 am

Hi there,
Looks like I face a bug in Bluetooth interrupt handlers. It happens when OTA task is writing chunks of downloaded image to the flash and at the same time BLE GATT server gets some read/write requests from the client

So based on my investigation, the root causes of the issue could be related to the Bluetooth interrupt handlers. At the same time as OTA code is writing something to the FLASH memory, a Bluetooth interrupt handler called and trying to execute the code from the same FLASH memory. As a result, it causes ESP32 exception.

There is the log:

Code: Select all

I (183741) Ota.c: Written image length 786432
Guru Meditation Error: Core  0 panic'ed (Cache disabled but cached memory region accessed)
Core 0 register dump:
PC      : 0x4012a11c  PS      : 0x00060634  A0      : 0x80044715  A1      : 0x3ffbe220
0x4012a11c: chnl_map_check at ??:?
A2      : 0x00000000  A3      : 0x00000006  A4      : 0x00000001  A5      : 0x3ffb2c7a
A6      : 0x000000ce  A7      : 0x00000000  A8      : 0x80088aa2  A9      : 0x3ffbe200
A10     : 0x3ffb2c7b  A11     : 0x0000000a  A12     : 0x00060021  A13     : 0x00000021
A14     : 0x00000078  A15     : 0x3ffbe990  SAR     : 0x0000001d  EXCCAUSE: 0x00000007
EXCVADDR: 0x00000000  LBEG    : 0x4000c2e0  LEND    : 0x4000c2f6  LCOUNT  : 0xffffffff
Core 0 was running in ISR context:
EPC1    : 0x40095df7  EPC2    : 0x4000bff0  EPC3    : 0x00000000  EPC4    : 0x4012a11c
0x40095df7: portENTER_CRITICAL_NESTED at C:/esp/esp-idf/components/freertos/include/freertos/portmacro.h:330
 (inlined by) xPortInIsrContext at C:/esp/esp-idf/components/freertos/port.c:338
0x4012a11c: chnl_map_check at ??:?
ELF file SHA256: 07362c11fa02e6aa
Backtrace: 0x4012a119:0x3ffbe220 0x40044712:0x3ffbe240 0x4008a563:0x3ffbe270 0x400893ad:0x3ffbe2a0 0x40089141:0x3ffbe2c0 0x4008ae2a:0x3ffbe2e0 0x4008bd53:0x3ffbe300 0x40085dd5:0x3ffbe320 0x4008cc5a:0x3ffb7d90 0x400853ef:0x3ffb7db0 0x40095cf1:0x3ffb7dd0
0x4012a119: llm_update_duplicate_scan_exceptional_list at ??:?
0x4008a563: r_lld_pdu_rx_handler at ??:?
0x400893ad: r_lld_evt_end at ??:?
0x40089141: r_lld_evt_end_isr at ??:?
0x4008ae2a: r_rwble_isr at ??:?
0x4008bd53: r_rwbtdm_isr_wrapper at intc.c:?
0x40085dd5: _xt_lowint1 at C:/esp/esp-idf/components/freertos/xtensa_vectors.S:1153
0x4008cc5a: spi_flash_op_block_func at C:/esp/esp-idf/components/spi_flash/cache_utils.c:81
0x400853ef: ipc_task at C:/esp/esp-idf/components/esp_common/src/ipc.c:62
0x40095cf1: vPortTaskWrapper at C:/esp/esp-idf/components/freertos/port.c:143
CPU halted.
Could someone help me with that?

ivan.khikhol
Posts: 2
Joined: Tue Oct 06, 2020 7:04 am

Re: OTA Image load crash - Guru meditation error

Postby ivan.khikhol » Tue Oct 06, 2020 1:18 pm

This one looks like the same issue: https://github.com/espressif/esp-idf/issues/2687
It mentioned as closed, but actually, it doesn't
So I'm using ESP-IDF release v4.0 with all the latest updates and can face it again...

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