When booting shim -> fallback -> shim -> grub -> linux the memory map is a bit larger than the size linux passes in on the first call. But in the EFI_BUFFER_TOO_SMALL case we were not passing back the updated size to linux so it would loop forever.
Signed-off-by: Rob Clark robdclark@gmail.com --- lib/efi_loader/efi_memory.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index f59e3ea327..9e079f1fa3 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -407,11 +407,11 @@ efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
map_size = map_entries * sizeof(struct efi_mem_desc);
+ *memory_map_size = map_size; + if (provided_map_size < map_size) return EFI_BUFFER_TOO_SMALL;
- *memory_map_size = map_size; - if (descriptor_size) *descriptor_size = sizeof(struct efi_mem_desc);