Help troubleshooting root cause for exceptions that seem to be raised in esp-wifi

[yanshay]

After my app is running for some time, the following exceptions happen, out of the blue (they are a bit different, in different runs).
I'm using ESP32S3.
From wifi perspective I'm listening to UDP packets and sometimes send UDP packets (exception happened when no packets were sent).
Wifi is running on the 2nd core, all that core is doing is processing wifi and passing the data through channels to the 1st core.

Anything I can learn from these exceptions to troubleshoot the cause?

Exception occured 'LoadProhibited'
Context
PC=0x40040b04       PS=0x00060a10
0x40040b04 - rom_rx_gain_force
    at ??:??
0x00060a10 - PS_WOE
    at ??:??
A0=0x8003f42d       A1=0x3fcaaf10       A2=0x3fcb8710       A3=0x42040250       A4=0x00000ffc
0x8003f42d - _rtc_fast_bss_end
    at ??:??
0x3fcaaf10 - _ZN8esp_wifi7preempt10TASK_STACK17hbb662d9af1528958E
    at ??:??
0x3fcb8710 - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
0x42040250 - _ZN8esp_wifi4wifi10os_adapter19task_yield_from_isr17h040b58cb3397e3e9E
    at ??:??
0x00000ffc - VECTORS_SIZE
    at ??:??
A5=0x3fcef858       A6=0xdeadbeef       A7=0x08880a9a       A8=0x08880964       A9=0x3fcb901c
0x3fcef858 - net80211_funcs
    at ??:??
0xdeadbeef - _rtc_fast_bss_end
    at ??:??
0x08880a9a - PS_WOE
    at ??:??
0x08880964 - PS_WOE
    at ??:??
0x3fcb901c - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
A10=0x00000008      A11=0x3fcb7e34      A12=0x00000008      A13=0x00000000      A14=0x3fcb7e94
0x00000008 - XT_STK_A0
    at ??:??
0x3fcb7e34 - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
0x00000008 - XT_STK_A0
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x3fcb7e94 - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
A15=0x3fcb7e04
0x3fcb7e04 - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
SAR=00000018
EXCCAUSE=0x0000001c EXCVADDR=0x08880a9a
0x0000001c - XT_STK_A5
    at ??:??
0x08880a9a - PS_WOE
    at ??:??
LBEG=0x40056f5c     LEND=0x40056f72     LCOUNT=0x00000000
0x40056f5c - rom_rx_gain_force
    at ??:??
0x40056f72 - rom_rx_gain_force
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
THREADPTR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
SCOMPARE1=0x00000001
0x00000001 - XT_STK_PC
    at ??:??
BR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
ACCLO=0x00000000    ACCHI=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
M0=0x00000000       M1=0x00000000       M2=0x00000000       M3=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F64R_LO=0xb1188534  F64R_HI=0xa69a5c6a  F64S=0xe660517e
0xb1188534 - _rtc_fast_bss_end
    at ??:??
0xa69a5c6a - _rtc_fast_bss_end
    at ??:??
0xe660517e - _rtc_fast_bss_end
    at ??:??
FCR=0x00000000      FSR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F0=0x00000000       F1=0x00000000       F2=0x00000000       F3=0x00000000       F4=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F5=0x00000000       F6=0x00000000       F7=0x00000000       F8=0x00000000       F9=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F10=0x00000000      F11=0x00000000      F12=0x00000000      F13=0x00000000      F14=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F15=0x00000000
0x00000000 - XT_STK_PC
    at ??:??

0x4037a5f9
0x4037a5f9 - ppTask
    at ??:??
0x420454d0
0x420454d0 - _ZN8esp_wifi6compat11task_runner10run_c_task17h97ae4d0ec4335bb2E
    at ??:??
0x40000000
0x40000000 - ets_rom_layout_p
    at ??:??

Exception occured 'LoadProhibited'
Context
PC=0x40040ae5       PS=0x00060f10
0x40040ae5 - rom_rx_gain_force
    at ??:??
0x00060f10 - PS_WOE
    at ??:??
A0=0x8003f42d       A1=0x3fcaaf00       A2=0x3fcb8708       A3=0x00000000       A4=0x00000000
0x8003f42d - _rtc_fast_bss_start
    at ??:??
0x3fcaaf00 - _ZN8esp_wifi7preempt10TASK_STACK17hbb662d9af1528958E
    at ??:??
0x3fcb8708 - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
A5=0x4037ad0c       A6=0x3fcc0270       A7=0x00000000       A8=0x00000000       A9=0x01000009
0x4037ad0c - sta_rx_cb
    at ??:??
0x3fcc0270 - s_fragment
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x01000009 - PS_WOE
    at ??:??
A10=0x00000008      A11=0x3fcb7e2c      A12=0x00000008      A13=0x00000000      A14=0x3fcb7e8c
0x00000008 - XT_STK_A0
    at ??:??
0x3fcb7e2c - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
0x00000008 - XT_STK_A0
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x3fcb7e8c - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
A15=0x3fcb7dfc
0x3fcb7dfc - _ZN8esp_wifi9HEAP_DATA17hac824954a1b00c0dE
    at ??:??
SAR=00000020
EXCCAUSE=0x0000001c EXCVADDR=0x00000000
0x0000001c - XT_STK_A5
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
LBEG=0x40056f5c     LEND=0x40056f72     LCOUNT=0x00000000
0x40056f5c - rom_rx_gain_force
    at ??:??
0x40056f72 - rom_rx_gain_force
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
THREADPTR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
SCOMPARE1=0x00000001
0x00000001 - XT_STK_PC
    at ??:??
BR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
ACCLO=0x00000000    ACCHI=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
M0=0x00000000       M1=0x00000000       M2=0x00000000       M3=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F64R_LO=0xb1188534  F64R_HI=0xa69a5c6a  F64S=0xe660517e
0xb1188534 - _rtc_fast_bss_start
    at ??:??
0xa69a5c6a - _rtc_fast_bss_start
    at ??:??
0xe660517e - _rtc_fast_bss_start
    at ??:??
FCR=0x00000000      FSR=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F0=0x00000000       F1=0x00000000       F2=0x00000000       F3=0x00000000       F4=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F5=0x00000000       F6=0x00000000       F7=0x00000000       F8=0x00000000       F9=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F10=0x00000000      F11=0x00000000      F12=0x00000000      F13=0x00000000      F14=0x00000000
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
0x00000000 - XT_STK_PC
    at ??:??
F15=0x00000000
0x00000000 - XT_STK_PC
    at ??:??

0x4037a5f9
0x4037a5f9 - ppTask
    at ??:??
0x420428c0
0x420428c0 - _ZN8esp_wifi6compat11task_runner10run_c_task17h97ae4d0ec4335bb2E
    at ??:??
0x40000000
0x40000000 - ets_rom_layout_p
    at ??:??

[bjoernQ]

The most probable reason might be a stack overflow - i.e. the stack grows into the .bss,.data or .rwtext segment.
The A1 register is the stack-pointer at the time of the exception. You can check if there is anything at that address with tools like readelf (to check segments) or nm (to check individual symbols)

[yanshay]

I increased the stack size and exceptions disappeared.