The IOAPIC hotplug lookup parses both MADT and _MAT records directly.
The MADT walk previously used a subtable's declared length to advance
the cursor after only locating a generic header. The _MAT path likewise
passed a generic header to the IOAPIC helper.
Validate that a current record has a complete generic header, that its
declared length is contained in the available record range, and that a
typed IOAPIC record contains the full fixed IOAPIC body before reading
its fields. Use the same relation for both MADT and _MAT provider
paths.
Fixes: ecf5636dcd ("ACPI: Add interfaces to parse IOAPIC ID for IOAPIC hotplug")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260715083253.22831-1-pengpeng@iscas.ac.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2c50ffdc73