Il 01/03/2014 13:30, Alexey Kardashevskiy ha scritto:
>
> Corrupted DMA buffer is 0x e00000 -- 0x7f15c313f000.
> The e1000 packet is at 0x12ffac2 -- 0x7f15c313eac2.
>
> (0x7f15c313f000 - 0x7f15c313eac2) = 0x53e which is less than 0x5aa and
> (0x5aa - 0x53e) = 0x6c bytes get corrupted.
>
> I see here buffer overrun from e1000 and I suspect that your patch just
> hides this problem. What did I miss?
Ping, anyone?
You missed that this is a Xen-specific problem. Xen maps things a page
at a time, so address_space_map/unmap/rw can operate only on a small
part of the requested [address, address+length) range.
So there is no overrun in e1000. The patch is incomplete, because it
fixes only address_space_rw, but the problem is indeed in exec.c.
Paolo
