Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [102/106] From: intel-iommu: Fix use after release during device attach | Date | Tue, 26 Apr 2011 14:14:24 -0700 (PDT) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ Date: Tue, 2 Nov 2010 08:05:51 +0100 Subject: [PATCH] intel-iommu: Fix use after release during device attach
Obtain the new pgd pointer before releasing the page containing this value.
Cc: stable@kernel.org Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> --- drivers/pci/intel-iommu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
Index: linux-2.6.35.y/drivers/pci/intel-iommu.c =================================================================== --- linux-2.6.35.y.orig/drivers/pci/intel-iommu.c +++ linux-2.6.35.y/drivers/pci/intel-iommu.c @@ -3638,9 +3638,9 @@ 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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