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ACPICA: Add validation for node in acpi_ns_build_normalized_path()

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Add validation for node in acpi_ns_build_normalized_path()
to prevent use-after-free vulnerabilities.

Link: https://github.com/acpica/acpica/commit/b35adf49e89a
Signed-off-by: ikaros <void0red@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/118666237.nniJfEyVGO@rafael.j.wysocki
This commit is contained in:
ikaros
2026-05-27 20:04:06 +02:00
committed by Rafael J. Wysocki
parent c5296da2d5
commit 96b2b61687
1 changed files with 6 additions and 0 deletions
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6
drivers/acpi/acpica/nsnames.c
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@@ -222,6 +222,12 @@ acpi_ns_build_normalized_path(struct acpi_namespace_node *node,
goto build_trailing_null;
}
/* Validate the Node to avoid use-after-free vulnerabilities */
if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
goto build_trailing_null;
}
next_node = node;
while (next_node && next_node != acpi_gbl_root_node) {
if (next_node != node) {