diff options
Diffstat (limited to 'net/core/link_watch.c')
| -rw-r--r-- | net/core/link_watch.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/net/core/link_watch.c b/net/core/link_watch.c index ab150641142a..cb04ef2b9807 100644 --- a/net/core/link_watch.c +++ b/net/core/link_watch.c @@ -42,12 +42,21 @@ static unsigned int default_operstate(const struct net_device *dev) * first check whether lower is indeed the source of its down state. */ if (!netif_carrier_ok(dev)) { - int iflink = dev_get_iflink(dev); struct net_device *peer; + int iflink; + + /* If called from netdev_run_todo()/linkwatch_sync_dev(), + * dev_net(dev) can be already freed, and RTNL is not held. + */ + if (dev->reg_state <= NETREG_REGISTERED) + iflink = dev_get_iflink(dev); + else + iflink = dev->ifindex; if (iflink == dev->ifindex) return IF_OPER_DOWN; + ASSERT_RTNL(); peer = __dev_get_by_index(dev_net(dev), iflink); if (!peer) return IF_OPER_DOWN; |