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xfrm: Fix NETDEV_DOWN with IPSec offload 

Upon NETDEV_DOWN event, all xfrm_state objects which are bound to
the device are flushed.

The condition for this is wrong, though, testing dev->hw_features
instead of dev->features. If a device has non-user-modifiable
NETIF_F_HW_ESP, then its xfrm_state objects are not flushed,
causing a crash later on after the device is deleted.

Check dev->features instead of dev->hw_features.

Fixes: d77e38e612 ("xfrm: Add an IPsec hardware offloading API")
Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Ilan Tayari 2017-05-08 10:30:18 +03:00 committed by Steffen Klassert
parent d90c902449
commit 2c1497bbc8
1 changed files with 1 additions and 1 deletions
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2
net/xfrm/xfrm_device.c
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@ -170,7 +170,7 @@ static int xfrm_dev_feat_change(struct net_device *dev)
static int xfrm_dev_down(struct net_device *dev) static int xfrm_dev_down(struct net_device *dev)
{ {
if (dev->hw_features & NETIF_F_HW_ESP) if (dev->features & NETIF_F_HW_ESP)
xfrm_dev_state_flush(dev_net(dev), dev, true); xfrm_dev_state_flush(dev_net(dev), dev, true);
xfrm_garbage_collect(dev_net(dev)); xfrm_garbage_collect(dev_net(dev));