linux-kernel - [PATCH] iommu: exynos: Fix out of bound array access

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Date:	Thu, 28 Mar 2013 14:19:10 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Kukjin Kim <kgene.kim@...sung.com>
Cc:	Joerg Roedel <joerg.roedel@....com>,
	KyongHo Cho <pullip.cho@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] iommu: exynos: Fix out of bound array access

In the case of no-match in "for (i = 0; i < (pdev->num_resources / 2); i++)",
i is "pdev->num_resources / 2". Fix the boundary checking to avoid the out of
bound array access for data->sfrbases[i].

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/iommu/exynos-iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 238a3ca..de04e6a 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -357,7 +357,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id)
 			break;
 	}
 
-	if (i == pdev->num_resources) {
+	if (i == pdev->num_resources / 2) {
 		itype = SYSMMU_FAULT_UNKNOWN;
 	} else {
 		itype = (enum exynos_sysmmu_inttype)
-- 
1.7.10.4



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