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net: add net device refcount tracker to dev_ifsioc()

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Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-04 20:22:01 -08:00 committed by Jakub Kicinski
parent 5ae2195088
commit 14ed029b5e
1 changed files with 3 additions and 2 deletions
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5
net/core/dev_ioctl.c
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@ -313,6 +313,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data,
int err;
struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
const struct net_device_ops *ops;
netdevice_tracker dev_tracker;
if (!dev)
return -ENODEV;
@ -381,10 +382,10 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data,
return -ENODEV;
if (!netif_is_bridge_master(dev))
return -EOPNOTSUPP;
dev_hold(dev);
dev_hold_track(dev, &dev_tracker, GFP_KERNEL);
rtnl_unlock();
err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL);
dev_put(dev);
dev_put_track(dev, &dev_tracker);
rtnl_lock();
return err;