disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/acpi/acpica/nswalk.c
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@@ -3,7 +3,7 @@
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  *
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  * Module Name: nswalk - Functions for walking the ACPI namespace
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  *
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- * Copyright (C) 2000 - 2018, Intel Corp.
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+ * Copyright (C) 2000 - 2020, Intel Corp.
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  *
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  *****************************************************************************/
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@@ -169,6 +169,9 @@
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 	if (start_node == ACPI_ROOT_OBJECT) {
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 		start_node = acpi_gbl_root_node;
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+		if (!start_node) {
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+			return_ACPI_STATUS(AE_NO_NAMESPACE);
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+		}
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 	}
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 	/* Null child means "get first node" */