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: v2.6.32.8~34
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=253f887cc8d719087f8de403cfe1a60b5e56b454;p=thirdparty%2Fkernel%2Fstable.git

x86/amd-iommu: Fix possible integer overflow

commit d91afd15b041f27d34859c79afa9e172018a86f4 upstream.

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.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 90b9b559e7a4c..e3f85feaae2ee 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -540,7 +540,7 @@ static void flush_all_devices_for_iommu(struct amd_iommu *iommu)
 static void flush_devices_by_domain(struct protection_domain *domain)
 {
 	struct amd_iommu *iommu;
-	int i;
+	unsigned long i;
 
 	for (i = 0; i <= amd_iommu_last_bdf; ++i) {
 		if ((domain == NULL && amd_iommu_pd_table[i] == NULL) ||