leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

intel-iommu: Fix use after release during device attach

Browse Source 
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>
Reviewed-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Jan Kiszka 2010-11-02 08:05:51 +01:00 committed by David Woodhouse
parent e78bf5e6cb
commit 7a6610139a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/intel-iommu.c
View File

@ -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--;
}