From: David S. Miller Date: Fri, 9 Mar 2007 09:41:04 +0000 (+0100) Subject: SPARC64: Fix memory corruption in pci_4u_free_consistent() X-Git-Tag: v2.6.16.44-rc1~7 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ec333318b748e4f4ac3679a197620503b6d19d20;p=karo-tx-linux.git 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 Signed-off-by: Adrian Bunk --- diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c index f63f0653dd0e..df9a3648dbc9 100644 --- a/arch/sparc64/kernel/pci_iommu.c +++ b/arch/sparc64/kernel/pci_iommu.c @@ -282,7 +282,7 @@ void pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_ 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);