Kernel crash on Manjaro ARM

[mfashby]

Hi! I run manjaro ARM on my pinebook pro. After the latest `pamac upgrade`, I've started to get regular lockups. Checking `journalctl` I have this kernel error in there:

https://pastebin.com/dw1T8x1z

Relevant error messsage seems to be 'Unable to handle kernel NULL pointer dereference', and the call stack looks like this

Jul 06 21:24:57 pinebook kernel: Call trace:
Jul 06 21:24:57 pinebook kernel: drm_ioctl+0x280/0x44c [drm]
Jul 06 21:24:57 pinebook kernel: __arm64_sys_ioctl+0xa8/0xec
Jul 06 21:24:57 pinebook kernel: invoke_syscall+0x48/0x114
Jul 06 21:24:57 pinebook kernel: el0_svc_common.constprop.0+0xbc/0xcc
Jul 06 21:24:57 pinebook kernel: do_el0_svc+0x24/0x90
Jul 06 21:24:57 pinebook kernel: el0_svc+0x2c/0x54
Jul 06 21:24:57 pinebook kernel: el0_sync_handler+0x1a4/0x1b0
Jul 06 21:24:57 pinebook kernel: el0_sync+0x198/0x1c0
Jul 06 21:24:57 pinebook kernel: Code: 35000575 a94573fb 17ffff79 f9401a80 (b940e800)
Jul 06 21:24:57 pinebook kernel: ---[ end trace fe4cd6ccb18f59e7 ]---


It seems the kernel is now version 5.13.0-1, I might try downgrading that.

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hmm, `downgrade linux` starts downloading x86 version, that's not gonna work.