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efi_loader: AllocateAddress requires page address

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AllocatePages() can be called with Type=AllocateAddress. Such a call can
only succeed if *Memory points to the address of an unallocated page range.

A call with *Memory being an address that is not page aligned must not
succeed. The UEFI specification requires returning EFI_OUT_OF_RESOURCES
if the requested pages cannot be allocated.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-11-06 01:52:13 +01:00
parent 0b4cbeba59
commit 53def68df5
1 changed files with 2 additions and 0 deletions
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2
lib/efi_loader/efi_memory.c
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@ -483,6 +483,8 @@ efi_status_t efi_allocate_pages(enum efi_allocate_type type,
return EFI_OUT_OF_RESOURCES; return EFI_OUT_OF_RESOURCES;
break; break;
case EFI_ALLOCATE_ADDRESS: case EFI_ALLOCATE_ADDRESS:
if (*memory & EFI_PAGE_MASK)
return EFI_NOT_FOUND;
/* Exact address, reserve it. The addr is already in *memory. */ /* Exact address, reserve it. The addr is already in *memory. */
ret = efi_check_allocated(*memory, false); ret = efi_check_allocated(*memory, false);
if (ret != EFI_SUCCESS) if (ret != EFI_SUCCESS)