linux-kernel - [PATCH 1/5] x86/amd-iommu: Fix possible integer overflow

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Message-ID: <1264180693-27197-2-git-send-email-joerg.roedel@amd.com>
Date:	Fri, 22 Jan 2010 18:18:09 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	Ingo Molnar <mingo@...hat.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org,
	Joerg Roedel <joerg.roedel@....com>, stable@...nel.org
Subject: [PATCH 1/5] x86/amd-iommu: Fix possible integer overflow

The variable i in this function could be increased to over
2**32 which would result in an integer overflow when using
int. Fix it by changing i to unsigned long.

Cc: stable@...nel.org
Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kernel/amd_iommu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 23824fe..c2ccbd7 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -980,7 +980,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
 {
 	int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
 	struct amd_iommu *iommu;
-	int i;
+	unsigned long i;
 
 #ifdef CONFIG_IOMMU_STRESS
 	populate = false;
-- 
1.6.6


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