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From e7c3f6b4365f3162f8e25d58f76410aca28719a2 Mon Sep 17 00:00:00 2001
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From: Stefan Weil <sw@weilnetz.de>
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Date: Tue, 4 Sep 2012 07:35:57 +0200
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Subject: [PATCH] target-arm: Fix potential buffer overflow
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Report from smatch:
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target-arm/helper.c:651 arm946_prbs_read(6) error:
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buffer overflow 'env->cp15.c6_region' 8 <= 8
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target-arm/helper.c:661 arm946_prbs_write(6) error:
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buffer overflow 'env->cp15.c6_region' 8 <= 8
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c7_region is an array with 8 elements, so the index must be less than 8.
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Signed-off-by: Stefan Weil <sw@weilnetz.de>
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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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---
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target-arm/helper.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/target-arm/helper.c b/target-arm/helper.c
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index dceaa95..e27df96 100644
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--- a/target-arm/helper.c
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+++ b/target-arm/helper.c
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@@ -645,7 +645,7 @@ static int pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri,
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static int arm946_prbs_read(CPUARMState *env, const ARMCPRegInfo *ri,
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uint64_t *value)
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{
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- if (ri->crm > 8) {
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+ if (ri->crm >= 8) {
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return EXCP_UDEF;
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}
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*value = env->cp15.c6_region[ri->crm];
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@@ -655,7 +655,7 @@ static int arm946_prbs_read(CPUARMState *env, const ARMCPRegInfo *ri,
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static int arm946_prbs_write(CPUARMState *env, const ARMCPRegInfo *ri,
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uint64_t value)
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{
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- if (ri->crm > 8) {
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+ if (ri->crm >= 8) {
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return EXCP_UDEF;
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}
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env->cp15.c6_region[ri->crm] = value;
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--
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1.7.12.1
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