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bridge: Partially disable netpoll support

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The new netpoll code in bridging contains use-after-free bugs
that are non-trivial to fix.

This patch fixes this by removing the code that uses skbs after
they're freed.

As a consequence, this means that we can no longer call bridge
from the netpoll path, so this patch also removes the controller
function in order to disable netpoll.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Thanks,
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2010-07-19 19:26:45 +00:00 • committed by David S. Miller
parent 45e77d3145
commit 573201f36f
2 changed files with 1 additions and 31 deletions
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9
net/bridge/br_device.c
View file

@ -217,14 +217,6 @@ static bool br_devices_support_netpoll(struct net_bridge *br)
return count != 0 && ret;
}
static void br_poll_controller(struct net_device *br_dev)
{
struct netpoll *np = br_dev->npinfo->netpoll;
if (np->real_dev != br_dev)
netpoll_poll_dev(np->real_dev);
}
void br_netpoll_cleanup(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
@ -295,7 +287,6 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_do_ioctl = br_dev_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_netpoll_cleanup = br_netpoll_cleanup,
.ndo_poll_controller = br_poll_controller,
#endif
};