Re: kmemcheck detected possible information leak to userspace?

[Evgeniy Polyakov]

On Tue, Jul 01, 2008 at 12:52:53PM +0200, Vegard Nossum (vegard.nossum@xxxxxxxxx) wrote:
> The u means uninitialized. So it seems not to be just the end. But I
> am not sure where the end of the buffer is anyway.
> 
> But there is one thing I forgot: Is this memory initialized by DMA? If
> so, the warning is bogus and I will go hide in shame.

It depends on driver, but sufficiently new hardware (or better say any
non-crappy hardware) will do dma transafer just into skb->data.

To catch it you can put kmemcheck hooks into pci_map* and friend
functions.

-- 
	Evgeniy Polyakov
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