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efi_loader: fix BootOrder variable measurement handling

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UEFI specification does not require that BootOrder is defined.
In current implementation, boot variable measurement fails and
returns EFI_NOT_FOUND if BootOrder is not defined.

This commit correcly handles this case, skip the boot variable
measurement if BootOrder is not defined.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Masahisa Kojima 2021-11-09 18:44:54 +09:00 • committed by Heinrich Schuchardt
parent 6354913def
commit c9c1cdbda3
1 changed files with 2 additions and 2 deletions
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4
lib/efi_loader/efi_tcg2.c
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@ -1452,8 +1452,8 @@ static efi_status_t tcg2_measure_boot_variable(struct udevice *dev)
boot_order = efi_get_var(var_name, &efi_global_variable_guid,
&var_data_size);
if (!boot_order) {
ret = EFI_NOT_FOUND;
goto error;
/* If "BootOrder" is not defined, skip the boot variable measurement */
return EFI_SUCCESS;
}
ret = tcg2_measure_variable(dev, 1, EV_EFI_VARIABLE_BOOT2, var_name,