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| author | Chas Williams <3chas3@gmail.com> | 2015-08-19 19:14:20 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-23 15:56:12 -0700 |
| commit | 9a873c71e91cabf4c10fd9bbd8358c22deaf6c9e (patch) | |
| tree | 67675aa39ba853e69550a74fe96968510cb46d2e /drivers/net/xen-netfront.c | |
| parent | f5117ce4f6a16fa2a02ceff9c337cfffca8b75f2 (diff) | |
| download | linux-9a873c71e91cabf4c10fd9bbd8358c22deaf6c9e.tar.gz linux-9a873c71e91cabf4c10fd9bbd8358c22deaf6c9e.tar.bz2 linux-9a873c71e91cabf4c10fd9bbd8358c22deaf6c9e.zip | |
net/xen-netfront: only clean up queues if present
If you simply load and unload the module without starting the interfaces,
the queues are never created and you get a bad pointer dereference.
Signed-off-by: Chas Williams <3chas3@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
| -rw-r--r-- | drivers/net/xen-netfront.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index f948c46d5132..002062db2f1d 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1336,7 +1336,7 @@ static void xennet_disconnect_backend(struct netfront_info *info) netif_carrier_off(info->netdev); - for (i = 0; i < num_queues; ++i) { + for (i = 0; i < num_queues && info->queues; ++i) { struct netfront_queue *queue = &info->queues[i]; if (queue->tx_irq && (queue->tx_irq == queue->rx_irq)) @@ -2101,7 +2101,8 @@ static int xennet_remove(struct xenbus_device *dev) unregister_netdev(info->netdev); - xennet_destroy_queues(info); + if (info->queues) + xennet_destroy_queues(info); xennet_free_netdev(info->netdev); return 0; |