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[PATCH] SPARC64: Fix memory corruption in pci_4u_free_consistent().

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
This commit is contained in:
David Miller
2006-10-25 23:51:07 -07:00
committed by Chris Wright
parent 59bf9f2fd5
commit 955ebc8df7
1 changed files with 1 additions and 1 deletions
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arch/sparc64/kernel/pci_iommu.c
+1 -1
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@@ -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);