From: Joerg Roedel <joerg.roedel@amd.com>
Date: Fri, 22 Jan 2010 15:40:20 +0000 (+0100)
Subject: x86/amd-iommu: Fix possible integer overflow
X-Git-Tag: v2.6.33-rc7~53^2~4^2~4
X-Git-Url: http://bbs.cooldavid.org/git/?a=commitdiff_plain;h=d91afd15b041f27d34859c79afa9e172018a86f4;p=net-next-2.6.git

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@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 23824fef789..c2ccbd7b862 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;