diff options
| author | Eric Dumazet <edumazet@google.com> | 2022-02-07 21:41:07 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-09 07:23:20 +0300 |
| commit | b2309a71c1f2fc841feb184195b2e46b2e139bf4 (patch) | |
| tree | 1b4e35003f3dfba1d8ff091a88411c0c462634f6 /net/core | |
| parent | 99f5a5f2b94840032e85f7616ef13301a962b96a (diff) | |
| download | linux-b2309a71c1f2fc841feb184195b2e46b2e139bf4.tar.xz | |
net: add dev->dev_registered_tracker
Convert one dev_hold()/dev_put() pair in register_netdevice()
and unregister_netdevice_many() to dev_hold_track()
and dev_put_track().
This would allow to detect a rogue dev_put() a bit earlier.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220207184107.1401096-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index f662c6a7d7b4..66556a21800a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -9683,8 +9683,10 @@ int register_netdevice(struct net_device *dev) linkwatch_init_dev(dev); dev_init_scheduler(dev); - dev_hold(dev); + + dev_hold_track(dev, &dev->dev_registered_tracker, GFP_KERNEL); list_netdevice(dev); + add_device_randomness(dev->dev_addr, dev->addr_len); /* If the device has permanent device address, driver should @@ -10449,7 +10451,7 @@ void unregister_netdevice_many(struct list_head *head) synchronize_net(); list_for_each_entry(dev, head, unreg_list) { - dev_put(dev); + dev_put_track(dev, &dev->dev_registered_tracker); net_set_todo(dev); } |