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Adjust the detection of Turbo Boost to prevent a theoretical array OOB access.

This commit is contained in:
jruoho 2011-03-02 06:23:17 +00:00
parent 5bfb3ade6b
commit 3c37c8c0bc
1 changed files with 4 additions and 3 deletions
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7
sys/arch/x86/acpi/acpi_cpu_md.c
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@ -1,4 +1,4 @@
/* $NetBSD: acpi_cpu_md.c,v 1.51 2011/03/02 06:17:09 jruoho Exp $ */
/* $NetBSD: acpi_cpu_md.c,v 1.52 2011/03/02 06:23:17 jruoho Exp $ */
/*-
* Copyright (c) 2010, 2011 Jukka Ruohonen <jruohonen@iki.fi>
@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.51 2011/03/02 06:17:09 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.52 2011/03/02 06:23:17 jruoho Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -541,7 +541,8 @@ acpicpu_md_pstate_pss(struct acpicpu_softc *sc)
* in Intel Core(tm) Microarchitectures (Nehalem)
* Based Processors. White Paper, November 2008.
*/
if ((sc->sc_flags & ACPICPU_FLAG_P_TURBO) != 0) {
if (sc->sc_pstate_count > 2 &&
(sc->sc_flags & ACPICPU_FLAG_P_TURBO) != 0) {
ps = &sc->sc_pstate[0];