Debian's arm64 UEFI Secure Boot shim makes the EFI variable store run out of space while mirroring its MOK database to variables. This can be observed in QEMU like so:
$ tools/buildman/buildman -o build/qemu_arm64 --boards=qemu_arm64 -w $ cd build/qemu_arm64 $ curl -L -o debian.iso \ https://cdimage.debian.org/debian-cd/current/arm64/iso-cd/debian-12.0.0-arm6... $ qemu-system-aarch64 \ -nographic -bios u-boot.bin \ -machine virt -cpu cortex-a53 -m 1G -smp 2 \ -drive if=virtio,file=debian.iso,index=0,format=raw,readonly=on,media=cdrom [...] => # interrupt autoboot => env set -e -bs -nv -rt -guid 605dab50-e046-4300-abb6-3dd810dd8b23 SHIM_VERBOSE 1 => boot [...] mok.c:296:mirror_one_esl() SetVariable("MokListXRT43", ... varsz=0x4C) = Out of Resources mok.c:452:mirror_mok_db() esd:0x7DB92D20 adj:0x30 Failed to set MokListXRT: Out of Resources mok.c:767:mirror_one_mok_variable() mirror_mok_db("MokListXRT", datasz=17328) returned Out of Resources mok.c:812:mirror_one_mok_variable() returning Out of Resources Could not create MokListXRT: Out of Resources [...] Welcome to GRUB!
This would normally be fine as shim would continue to run grubaa64.efi, but shim's error handling code for this case has a bug [1] that causes a synchronous abort on at least chromebook_kevin (but apparently not on QEMU arm64).
Double the default variable store size so the variables fit. There is a note about this value matching PcdFlashNvStorageVariableSize when EFI_MM_COMM_TEE is enabled, so keep the old default in that case.
[1] https://github.com/rhboot/shim/pull/577
Signed-off-by: Alper Nebi Yasak alpernebiyasak@gmail.com --- I'm not very familiar with EFI things, apologies if this default should not be changed (consider this a bug report in that case).
lib/efi_loader/Kconfig | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig index c5835e6ef61a..0660d1174902 100644 --- a/lib/efi_loader/Kconfig +++ b/lib/efi_loader/Kconfig @@ -96,7 +96,8 @@ endif
config EFI_VAR_BUF_SIZE int "Memory size of the UEFI variable store" - default 16384 + default 16384 if EFI_MM_COMM_TEE + default 32768 range 4096 2147483647 help This defines the size in bytes of the memory area reserved for keeping @@ -106,7 +107,7 @@ config EFI_VAR_BUF_SIZE match the value of PcdFlashNvStorageVariableSize used to compile the StandAloneMM module.
- Minimum 4096, default 16384. + Minimum 4096, default 32768, or 16384 when using StandAloneMM.
config EFI_GET_TIME bool "GetTime() runtime service"