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efi_loader: check map_key in ExitBootServices

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The UEFI spec requires that the memory map key is checked in
ExitBootServices().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-07-02 12:53:55 +02:00 • committed by Alexander Graf
parent 8e835554b3
commit 1fcb7ea284
3 changed files with 14 additions and 1 deletions
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4
lib/efi_loader/efi_boottime.c
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@ -1854,6 +1854,10 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
EFI_ENTRY("%p, %ld", image_handle, map_key);
/* Check that the caller has read the current memory map */
if (map_key != efi_memory_map_key)
return EFI_INVALID_PARAMETER;
/* Make sure that notification functions are not called anymore */
efi_tpl = TPL_HIGH_LEVEL;