commit: 7a6610139a1e1d9297dd1c5d178022eac36839cb From: Jan Kiszka <[email protected]> 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: [email protected] Signed-off-by: Jan Kiszka <[email protected]> Reviewed-by: Sheng Yang <[email protected]> Signed-off-by: David Woodhouse <[email protected]> --- drivers/pci/intel-iommu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 4789f8e..35463dd 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3627,9 +3627,9 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, 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--; } _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
