Messages in this thread Patch in this message | | | Date | Fri, 29 Apr 2011 11:55:35 -0700 | From | Greg KH <> | Subject | [12/55] intel-iommu: Fix use after release during device attach |
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2.6.38-stable review patch. If anyone has any objections, please let us know.
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From: Jan Kiszka <jan.kiszka@siemens.com>
commit 7a6610139a1e1d9297dd1c5d178022eac36839cb upstream.
Obtain the new pgd pointer before releasing the page containing this value.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/pci/intel-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3627,9 +3627,9 @@ static int intel_iommu_attach_device(str pte = dmar_domain->pgd; if (dma_pte_present(pte)) { - free_pgtable_page(dmar_domain->pgd); dmar_domain->pgd = (struct dma_pte *) phys_to_virt(dma_pte_addr(pte)); + free_pgtable_page(pte); } dmar_domain->agaw--; }
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