From 012d64ff68f304df1c35ce5902f5023dc14b643f Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 25 Oct 2006 22:33:07 -0700 Subject: [PATCH] [SPARC64]: Fix memory corruption in pci_4u_free_consistent(). The second argument to free_npages() was being incorrectly calculated, which would thus access far past the end of the arena->map[] bitmap. Signed-off-by: David S. Miller --- arch/sparc64/kernel/pci_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c index 82e5455134c6..2e7f1427088a 100644 --- a/arch/sparc64/kernel/pci_iommu.c +++ b/arch/sparc64/kernel/pci_iommu.c @@ -281,7 +281,7 @@ static void pci_4u_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, spin_lock_irqsave(&iommu->lock, flags); - free_npages(iommu, dvma, npages); + free_npages(iommu, dvma - iommu->page_table_map_base, npages); spin_unlock_irqrestore(&iommu->lock, flags); -- 2.20.1