efi_loader: GetNextMonotonicCount() check parameter
Do not write to address indicated by NULL pointer. UEFI SCT II 2.6 (2017), 3.6.5 GetNextMonotonicCount(), 5.1.5.5.1 Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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@ -1916,10 +1916,17 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
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static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
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{
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static uint64_t mono;
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efi_status_t ret;
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EFI_ENTRY("%p", count);
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if (!count) {
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ret = EFI_INVALID_PARAMETER;
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goto out;
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}
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*count = mono++;
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return EFI_EXIT(EFI_SUCCESS);
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ret = EFI_SUCCESS;
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out:
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return EFI_EXIT(ret);
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}
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/**
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