Re: [PATCH] Fix fencepost error in x86_64 IOMMU (2.4)

[Andi Kleen]

On Tue, 17 Feb 2004 16:14:46 -0500
Jim Paradis <jparadis@xxxxxxxxxx> wrote:

> There's a fencepost error in the GART IOMMU handling on x86_64
> in the unmap path.  When testing to see if the bus address is
> within the IOMMU window and needs to be unmapped, the start of
> the first page *beyond* the window also passes the test.  This
> can cause the first doubleword of the next page beyond the gatt
> table to be smashed to zero, with unpredictable results depending
> on what that page is used for.
> 
> Patch attached for 2.4.  The same problem also exists in 2.6,
> for which I'll send a separate patch.

Thanks. I will add it to my tree.

-Andi
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