Re: [PATCH]: iommu fix potential overflow in alloc_iommu()

From: FUJITA Tomonori
Date: Mon Jul 21 2008 - 11:16:53 EST

On Mon, 21 Jul 2008 10:15:22 -0400
Prarit Bhargava <prarit@xxxxxxxxxx> wrote:

> (This didn't appear on LKML or any of the mirrors ... trying again)
> It is possible that alloc_iommu()'s boundary_size overflows as
> dma_get_seg_boundary can return 0xffffffff. In that case, further usage of
> boundary_size triggers a BUG_ON() in the iommu code.

Did you actually hit this? pci-gart_64.c is used only by X86_64.
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