Tests: lib: gui: lvgl: test causes a Stack Overflow on stm32f746g_disco

[ajarmouni-st]

Describe the bug Tests/lib/gui/lvgl test does not run on stm32f746g_disco, & possibly other platforms as well, & causes a Stack Overflow.

• target platform: tested on stm32f746g_disco
• Attempted workaround: update LittleFS to 2.8.1 using PR 65414
• Still don't know if it's a regression

To Reproduce Steps to reproduce the behavior:

1. cd ~/zephyrproject/zephyr
2. west build -p always -b stm32f746g_disco tests/lib/gui/lvgl
3. west flash

Expected behavior Random noise on the screen

Impact Cannot run test

Logs and console output

I: Reading SFDP
I: qspi-nor-flash@0: SFDP v 1.5 AP ff with 2 PH
I: PH0: ff00 rev 1.5: 16 DW @ 30
I: Reading SFDP
I: qspi-nor-flash@0: 16 MiBy flash
I: PH1: ff03 rev 1.0: 2 DW @ 100
* Booting Zephyr OS build zephyr-v3.5.0-4181-g4204ca9bcb3f *
Running TESTSUITE lvgl_fs
===================================================================
I: LittleFS version 2.5, disk version 2.0
I: FS at qspi-nor-flash@0:0xa0000 is 3840 0x1000-byte blocks with 512 cycle
I: sizes: rd 16 ; pr 16 ; ca 64 ; la 32
E: * MPU FAULT *
E:   Stacking error (context area might be not valid)
E:   Data Access Violation
E:   MMFAR Address: 0x2001da38
E: r0/a1:  0x00000002  r1/a2:  0x2001da5c  r2/a3:  0x2001da5c
E: r3/a4:  0x00000000 r12/ip:  0x00000000 r14/lr:  0x2001da70
E:  xpsr:  0x00000000
E: Faulting instruction address (r15/pc): 0x2001da70
E: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
E: Current thread: 0x200146f0 (main)
E: Halting system

Environment:

• OS: Linux
• Toolchain: Zephyr SDK 0.16.3
• Commit SHA: main branch, 4204ca9bcb3f675a0e63f647931ffe2c4b515729

Additional context None for now

[simontheu]

Do you have enough stack size? I had this on my Sam_e70 derived project, I put "CONFIG_MAIN_STACK_SIZE=8192" in the prj.conf to solve.

[ajarmouni-st]

Do you have enough stack size? I had this on my Sam_e70 derived project, I put "CONFIG_MAIN_STACK_SIZE=8192" in the prj.conf to solve.

@simontheu No it does not solve the problem.

[de-nordic]

Check stacks. Maybe ISR stack. This ain't LittleFS. Play with all available stack settings and then narrow down.

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