From: Andrei Borzenkov Subject: [PATCH] efi: really mark memory of unknown type as reserved 9be4c45dbe3c877d1f4856e99ee15133c6cd2261 added switch case between fall through cases, causing all memory regions of unknown type to be marked as available. Move default case into its own block and add explicit FALLTHROUGH annotation. Reported by Elliott, Robert (Persistent Memory) --- grub-core/mmap/efi/mmap.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/grub-core/mmap/efi/mmap.c b/grub-core/mmap/efi/mmap.c index a77efe8..6b5f5d8 100644 --- a/grub-core/mmap/efi/mmap.c +++ b/grub-core/mmap/efi/mmap.c @@ -73,6 +73,7 @@ grub_efi_mmap_iterate (grub_memory_hook_t hook, void *hook_data, GRUB_MEMORY_AVAILABLE, hook_data); break; } + /* FALLTHROUGH */ case GRUB_EFI_RUNTIME_SERVICES_CODE: hook (desc->physical_start, desc->num_pages * 4096, GRUB_MEMORY_CODE, hook_data); @@ -83,10 +84,6 @@ grub_efi_mmap_iterate (grub_memory_hook_t hook, void *hook_data, GRUB_MEMORY_BADRAM, hook_data); break; - default: - grub_printf ("Unknown memory type %d, considering reserved\n", - desc->type); - case GRUB_EFI_BOOT_SERVICES_DATA: if (!avoid_efi_boot_services) { @@ -94,6 +91,7 @@ grub_efi_mmap_iterate (grub_memory_hook_t hook, void *hook_data, GRUB_MEMORY_AVAILABLE, hook_data); break; } + /* FALLTHROUGH */ case GRUB_EFI_RESERVED_MEMORY_TYPE: case GRUB_EFI_RUNTIME_SERVICES_DATA: case GRUB_EFI_MEMORY_MAPPED_IO: @@ -119,6 +117,13 @@ grub_efi_mmap_iterate (grub_memory_hook_t hook, void *hook_data, hook (desc->physical_start, desc->num_pages * 4096, GRUB_MEMORY_NVS, hook_data); break; + default: + grub_printf ("Unknown memory type %d, considering reserved\n", + desc->type); + hook (desc->physical_start, desc->num_pages * 4096, + GRUB_MEMORY_RESERVED, hook_data); + break; + } } -- tg: (f9d1b44..) u/efi-unknown-memory-type (depends on: master)