Re: [PATCH] xen-netfront: Remove BUGs on paged skb data which crosses a page boundary

From: David Miller
Date: Tue Dec 02 2014 - 22:21:43 EST

From: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
Date: Tue, 25 Nov 2014 20:28:24 -0600

> These BUGs can be erroneously triggered by frags which refer to
> tail pages within a compound page. The data in these pages may
> overrun the hardware page while still being contained within the
> compound page, but since compound_order() evaluates to 0 for tail
> pages the assertion fails. The code already iterates through
> subsequent pages correctly in this scenario, so the BUGs are
> unnecessary and can be removed.
> Fixes: f36c374782e4 ("xen/netfront: handle compound page fragments on transmit")
> Cc: <stable@xxxxxxxxxxxxxxx> # 3.7+
> Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>

Applied, thanks.
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