[SPARC64]: Fix memory corruption in pci_4u_free_consistent().
David S. Miller [Thu, 26 Oct 2006 05:33:07 +0000 (22:33 -0700)]
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 <davem@davemloft.net>

arch/sparc64/kernel/pci_iommu.c

index 82e5455..2e7f142 100644 (file)
@@ -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);