提交 0d68fc4f 编写于 作者: H Hangbin Liu 提交者: David S. Miller

infiniband: make sure the src net is infiniband when create new link

When we create a new infiniband link with uninfiniband device, e.g. `ip link
add link em1 type ipoib pkey 0x8001`. We will get a NULL pointer dereference
cause other dev like Ethernet don't have struct ib_device.

The code path is:
rtnl_newlink
  |-- ipoib_new_child_link
        |-- __ipoib_vlan_add
              |-- ipoib_set_dev_features
                    |-- ib_query_device

Fix this bug by make sure the src net is infiniband when create new link.
Signed-off-by: NHangbin Liu <liuhangbin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 7bda701e
......@@ -31,6 +31,7 @@
*/
#include <linux/netdevice.h>
#include <linux/if_arp.h> /* For ARPHRD_xxx */
#include <linux/module.h>
#include <net/rtnetlink.h>
#include "ipoib.h"
......@@ -103,7 +104,7 @@ static int ipoib_new_child_link(struct net *src_net, struct net_device *dev,
return -EINVAL;
pdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
if (!pdev)
if (!pdev || pdev->type != ARPHRD_INFINIBAND)
return -ENODEV;
ppriv = netdev_priv(pdev);
......
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