[src/trunk]: src/usr.sbin/acpitools/acpidump Check DSDT signature in acpi_han...

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4463b51ee956
branches:  trunk
changeset: 355864:4463b51ee956
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Fri Aug 18 09:49:24 2017 +0000

description:
Check DSDT signature in acpi_handle_fadt() for broken ACPI table.

diffstat:

 usr.sbin/acpitools/acpidump/acpi.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 0a82114ebb35 -r 4463b51ee956 usr.sbin/acpitools/acpidump/acpi.c
--- a/usr.sbin/acpitools/acpidump/acpi.c        Fri Aug 18 04:07:51 2017 +0000
+++ b/usr.sbin/acpitools/acpidump/acpi.c        Fri Aug 18 09:49:24 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi.c,v 1.16 2017/08/04 06:30:36 msaitoh Exp $ */
+/* $NetBSD: acpi.c,v 1.17 2017/08/18 09:49:24 msaitoh Exp $ */
 
 /*-
  * Copyright (c) 1998 Doug Rabson
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: acpi.c,v 1.16 2017/08/04 06:30:36 msaitoh Exp $");
+__RCSID("$NetBSD: acpi.c,v 1.17 2017/08/18 09:49:24 msaitoh Exp $");
 
 #include <sys/param.h>
 #include <sys/endian.h>
@@ -775,6 +775,8 @@
                dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->Dsdt);
        else
                dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->XDsdt);
+       if (memcmp(dsdp->Signature, ACPI_SIG_DSDT, 4) != 0)
+               errx(EXIT_FAILURE, "DSDT signature mismatch");
        if (acpi_checksum(dsdp, dsdp->Length))
                errx(EXIT_FAILURE, "DSDT is corrupt");
        acpi_print_dsdt(dsdp);