xen-netfront: Remove BUGs on paged skb data which crosses a page boundary

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commit 8d609725d4 upstream.

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: f36c374782 ("xen/netfront: handle compound page fragments on transmit")
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Seth Forshee 2014-11-25 20:28:24 -06:00 • committed by Greg Kroah-Hartman

parent 867dc3a68f

commit aea356313d

1 changed files with 0 additions and 5 deletions

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drivers/net/xen-netfront.c

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