Solved with Kernel 4.20.2-2
Kernel 4.20.2-1-ARCH #1
Device Odroid U2/U3
Since update to Kernel 4.20.2-1-ARCH #1:
$this->bbcode_second_pass_code('', '
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 66985670
[00000000] *pgd=00000000
Internal error: Oops: 5 [#3] PREEMPT SMP ARM
')
several times at boot.
Booting sometimes fails completely
Full dmesg at:
https://ptpb.pw/ok00
Downgrading Kernel 4.20.2-1 -> 4.19.6-1 solves problem for the moment.