Comment # 1 on bug 1225787 from Tamara Schmitz

On a Raspberry Pi 4 1GB I noticed that the option gpu_mem=32 on the boot.txt of
the FAT32 partition would cause me this and also sometimes result in kernel
panics complaining about being unable to handel a kernel paging request at a
certain virtual address.

My workaround was to add gpu_mem=64 into /boot/efi/extraconfig.txt (the FAT32
boot partition is mounted as /boot/efi).

Unsure if this applies here too.