Esp-idf: A stack overflow in task sys_evt has been detected (IDFGH-2977)

Created on 27 Mar 2020  路  4Comments  路  Source: espressif/esp-idf

Environment

  • Development Kit: [ESP32-Wrover-Kit|
  • Kit version (for WroverKit/): [v4]
  • Module or chip used: [|ESP32-WROVER-B|
  • IDF version :: v4.2-dev-701-g0ae960f2f
  • Build System: [|CMake & idf.py]
  • Compiler version xtensa-esp32-elf-gcc (crosstool-NG esp-2019r2) 8.2.0

  • Operating System: [|Linux|]

  • Using an IDE?: [|Yes eclipse & idf.py from command line

  • Power Supply: [USB|

Problem Description

Ive using the existing event loops
Im publishing some test data to a mqtt broker
when the WIFI connection disconnets then the MQTT broker should shutdown and restart
also the task which is created should also shutdown.

The program crashes

Expected Behavior

The list of all the running tasks are shown

Actual Behavior

Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x1e (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4
load:0x3fff0034,len:6884
load:0x40078000,len:13720
load:0x40080400,len:3920
entry 0x40080680
I (29) boot: ESP-IDF v4.2-dev-701-g0ae960f2f 2nd stage bootloader
I (29) boot: compile time 13:29:11
I (29) boot: chip revision: 1
I (33) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (40) boot.esp32: SPI Speed      : 40MHz
I (45) boot.esp32: SPI Mode       : DIO
I (50) boot.esp32: SPI Flash Size : 4MB
I (54) boot: Enabling RNG early entropy source...
I (60) boot: Partition Table:
I (63) boot: ## Label            Usage          Type ST Offset   Length
I (70) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (78) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (85) boot:  2 factory          factory app      00 00 00010000 00100000
I (93) boot: End of partition table
I (97) boot_comm: chip revision: 1, min. application chip revision: 0
I (104) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x1e134 (123188) map
I (160) esp_image: segment 1: paddr=0x0002e15c vaddr=0x3ffb0000 size=0x01ebc (  7868) load
I (163) esp_image: segment 2: paddr=0x00030020 vaddr=0x400d0020 size=0x8c0ec (573676) map
I (383) esp_image: segment 3: paddr=0x000bc114 vaddr=0x3ffb1ebc size=0x01a50 (  6736) load
I (386) esp_image: segment 4: paddr=0x000bdb6c vaddr=0x40080000 size=0x00400 (  1024) load
I (390) esp_image: segment 5: paddr=0x000bdf74 vaddr=0x40080400 size=0x14f5c ( 85852) load
I (447) boot: Loaded app from partition at offset 0x10000
I (447) boot: Disabling RNG early entropy source...
I (448) cpu_start: Pro cpu up.
I (451) cpu_start: Application information:
I (456) cpu_start: Project name:     wifi_station
I (461) cpu_start: App version:      1
I (466) cpu_start: Compile time:     Mar 27 2020 13:29:10
I (472) cpu_start: ELF file SHA256:  43cbe0faf4facc14...
I (478) cpu_start: ESP-IDF:          v4.2-dev-701-g0ae960f2f
I (484) cpu_start: Starting app cpu, entry point is 0x400811b0
I (477) cpu_start: App cpu up.
I (495) heap_init: Initializing. RAM available for dynamic allocation:
I (502) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (508) heap_init: At 3FFB94E0 len 00026B20 (154 KiB): DRAM
I (514) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (520) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (527) heap_init: At 4009535C len 0000ACA4 (43 KiB): IRAM
I (533) cpu_start: Pro cpu start user code
I (551) spi_flash: detected chip: generic
I (552) spi_flash: flash io: dio
I (552) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (560) wifi station: [APP] Startup..
I (560) wifi station: [APP] Free memory: 261344 bytes
I (570) wifi station: [APP] IDF version: v4.2-dev-701-g0ae960f2f
I (610) wifi station: ESP_WIFI_MODE_STA
I (620) wifi:wifi driver task: 3ffd7300, prio:23, stack:3584, core=0
I (620) system_api: Base MAC address is not set
I (620) system_api: read default base MAC address from EFUSE
I (640) wifi:wifi firmware version: d76a2dd
I (640) wifi:config NVS flash: enabled
I (640) wifi:config nano formating: disabled
I (650) wifi:Init dynamic tx buffer num: 32
I (650) wifi:Init data frame dynamic rx buffer num: 32
I (650) wifi:Init management frame dynamic rx buffer num: 32
I (660) wifi:Init management short buffer num: 32
I (660) wifi:Init static rx buffer size: 1600
I (670) wifi:Init static rx buffer num: 10
I (670) wifi:Init dynamic rx buffer num: 32
I (770) phy: phy_version: 4180, cb3948e, Sep 12 2019, 16:39:13, 0, 0
I (770) wifi:mode : sta (bc:dd:c2:d1:c0:88)
I (770) wifi station: wifi_init_sta finished***ERROR*** A stack overflow in task sys_evt has been detected.
abort() was called at PC 0x4008fbb4 on core 0

ELF file SHA256: 43cbe0faf4facc1452c5f2ac9a26d6d0ceb5423569e8689f77bed0299aa6fc62

Backtrace: 0x4008f809:0x3ffd1120 0x4008fb9d:0x3ffd1140 0x4008fbb4:0x3ffd1160 0x400933aa:0x3ffd1180 0x40094e94:0x3ffd11a0 0x40094e4a:0xe0a718ac |<-CORRUPTED

Rebooting...
ets Jun  8 2016 00:22:57

Steps to reproduce

Run the code in the zip
station.zip

picture rebeliousconformist

Most helpful comment

Hi @rebeliousconformist

Please note that the handlers registered for WiFi and network (WIFI_EVENT, IP_EVENT) are called from system_event task, which has a limited stack size. Seems like your code trying to use most of that stack for local variables:

static void event_handler(void* arg, esp_event_base_t event_base,
                                int32_t event_id, void* event_data)
{
       ...
        char stats_buffer[16384];
        vTaskList(stats_buffer);
        printf("%s\n", stats_buffer);
     ...
}

while the sdkconfig in your project says CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=16384 .
In that setup the stack overflow in task sys_evt is expected.

You can use either static or dynamic allocation to address the issue, possibly prefixing the buffer definition with static should fix the issue.

picture david-cermak on 31 Mar 2020
👍3

All 4 comments

@rebeliousconformist Thanks for reporting, we will look into.

Alvin1Zhang picture Alvin1Zhang on 30 Mar 2020

Hi @rebeliousconformist

Please note that the handlers registered for WiFi and network (WIFI_EVENT, IP_EVENT) are called from system_event task, which has a limited stack size. Seems like your code trying to use most of that stack for local variables:

static void event_handler(void* arg, esp_event_base_t event_base,
                                int32_t event_id, void* event_data)
{
       ...
        char stats_buffer[16384];
        vTaskList(stats_buffer);
        printf("%s\n", stats_buffer);
     ...
}

while the sdkconfig in your project says CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=16384 .
In that setup the stack overflow in task sys_evt is expected.

You can use either static or dynamic allocation to address the issue, possibly prefixing the buffer definition with static should fix the issue.

david-cermak picture david-cermak on 31 Mar 2020
👍3

@rebeliousconformist Thanks for reporting. Would you please help share if any updates or details for this issue? Thanks.

Alvin1Zhang picture Alvin1Zhang on 21 May 2020

@david-cermak understood makes sense. would like to close it

rebeliousconformist picture rebeliousconformist on 17 Jun 2020
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