From 96b2b616870e46e2bc04efec03879683a0036e66 Mon Sep 17 00:00:00 2001 From: ikaros Date: Wed, 27 May 2026 20:04:06 +0200 Subject: [PATCH] ACPICA: Add validation for node in acpi_ns_build_normalized_path() 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 Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/118666237.nniJfEyVGO@rafael.j.wysocki --- drivers/acpi/acpica/nsnames.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c index 22aeeeb56cff..19802da865c5 100644 --- a/drivers/acpi/acpica/nsnames.c +++ b/drivers/acpi/acpica/nsnames.c @@ -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) {