Re: [PREEMPT] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted

[Shrikanth Hegde]

Hi Christian.

On 11/6/26 10:37 AM, Christian Zigotzky wrote:
> Hi all,
>
> Ever since we enabled PREEMPT on our Nemo boards [1], we have been experiencing occasional problems with the kernel stack.
>
> Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: srcu_gp_start_if_needed+0x534/0x538
> Rebooting in 180 seconds..

We had one known issue which michal had brought up.
Do you have tracing enabled or running a bpf/bcc program?

This is the fix already in upstream. Do you have this patch?
https://lore.kernel.org/all/20260921072151.35531-1-sshegde@xxxxxxxxxxxxx/#t
 
> We are using the following patches: [2] [3]
>
> We have disabled PREEMPT with a patch [4] again, and since then our Nemo boards have been running perfectly once more.
>
> As the problem with the kernel stack only occurs sporadically, bisection is impossible.
>
> I hope you can fix the kernel stack issue.
>
> Thanks,
> Christian
>
> [1] https://en.wikipedia.org/wiki/AmigaOne_X1000
>
> [2] https://raw.githubusercontent.com/chzigotzky/kernels/refs/heads/main/patches/X1000/preempt_v1.patch
>
> [3] https://raw.githubusercontent.com/chzigotzky/kernels/refs/heads/main/patches/X1000/kvm_powerpc.patch
>
> [4] https://raw.githubusercontent.com/chzigotzky/kernels/refs/heads/main/patches/X1000/Kconfig.preempt.patch
>
> [5] Kernel config: https://raw.githubusercontent.com/chzigotzky/kernels/31c064092e3aab0875c47d44838443c9515b2970/configs/x1000_defconfig